NDC 69076-105 Tenofovir Disoproxil Fumarate

Tenofovir Disoproxil Fumarate

NDC Product Code 69076-105

NDC Code: 69076-105

Proprietary Name: Tenofovir Disoproxil Fumarate What is the Proprietary Name?
The proprietary name also known as the trade name is the name of the product chosen by the medication labeler for marketing purposes.

Non-Proprietary Name: Tenofovir Disoproxil Fumarate What is the Non-Proprietary Name?
The non-proprietary name is sometimes called the generic name. The generic name usually includes the active ingredient(s) of the product.

Product Characteristics

Color(s):
BLUE (C48333)
Shape: FREEFORM (C48340)
Size(s):
17 MM
Imprint(s):
32
Score: 1

NDC Code Structure

  • 69076 - Quinn Pharmaceuticals, Llc

NDC 69076-105-03

Package Description: 30 TABLET, COATED in 1 BOTTLE, PLASTIC

NDC Product Information

Tenofovir Disoproxil Fumarate with NDC 69076-105 is a a human prescription drug product labeled by Quinn Pharmaceuticals, Llc. The generic name of Tenofovir Disoproxil Fumarate is tenofovir disoproxil fumarate. The product's dosage form is tablet, coated and is administered via oral form.

Labeler Name: Quinn Pharmaceuticals, Llc

Dosage Form: Tablet, Coated - A solid dosage form that contains medicinal substances with or without suitable diluents and is covered with a designated coating.

Product Type: Human Prescription Drug What kind of product is this?
Indicates the type of product, such as Human Prescription Drug or Human Over the Counter Drug. This data element matches the “Document Type” field of the Structured Product Listing.

Tenofovir Disoproxil Fumarate Active Ingredient(s)

What is the Active Ingredient(s) List?
This is the active ingredient list. Each ingredient name is the preferred term of the UNII code submitted.

  • TENOFOVIR DISOPROXIL FUMARATE 300 mg/1

Inactive Ingredient(s)

About the Inactive Ingredient(s)
The inactive ingredients are all the component of a medicinal product OTHER than the active ingredient(s). The acronym "UNII" stands for “Unique Ingredient Identifier” and is used to identify each inactive ingredient present in a product.

  • STARCH, CORN (UNII: O8232NY3SJ)
  • CROSCARMELLOSE SODIUM (UNII: M28OL1HH48)
  • LACTOSE MONOHYDRATE (UNII: EWQ57Q8I5X)
  • CELLULOSE, MICROCRYSTALLINE (UNII: OP1R32D61U)
  • MAGNESIUM STEARATE (UNII: 70097M6I30)
  • FD&C BLUE NO. 2 (UNII: L06K8R7DQK)
  • TITANIUM DIOXIDE (UNII: 15FIX9V2JP)
  • TRIACETIN (UNII: XHX3C3X673)
  • HYPROMELLOSE 2910 (15 MPA.S) (UNII: 36SFW2JZ0W)

Administration Route(s)

What are the Administration Route(s)?
The translation of the route code submitted by the firm, indicating route of administration.

  • Oral - Administration to or by way of the mouth.

Pharmacological Class(es)

What is a Pharmacological Class?
These are the reported pharmacological class categories corresponding to the SubstanceNames listed above.

  • Hepatitis B Virus Nucleoside Analog Reverse Transcriptase Inhibitor - [EPC] (Established Pharmacologic Class)
  • Nucleoside Analog - [EXT]
  • Nucleoside Reverse Transcriptase Inhibitors - [MoA] (Mechanism of Action)
  • Human Immunodeficiency Virus Nucleoside Analog Reverse Transcriptase Inhibitor - [EPC] (Established Pharmacologic Class)

Product Labeler Information

What is the Labeler Name?
Name of Company corresponding to the labeler code segment of the Product NDC.

Labeler Name: Quinn Pharmaceuticals, Llc
Labeler Code: 69076
FDA Application Number: ANDA209498 What is the FDA Application Number?
This corresponds to the NDA, ANDA, or BLA number reported by the labeler for products which have the corresponding Marketing Category designated. If the designated Marketing Category is OTC Monograph Final or OTC Monograph Not Final, then the Application number will be the CFR citation corresponding to the appropriate Monograph (e.g. “part 341”). For unapproved drugs, this field will be null.

Marketing Category: ANDA - A product marketed under an approved Abbreviated New Drug Application. What is the Marketing Category?
Product types are broken down into several potential Marketing Categories, such as NDA/ANDA/BLA, OTC Monograph, or Unapproved Drug. One and only one Marketing Category may be chosen for a product, not all marketing categories are available to all product types. Currently, only final marketed product categories are included. The complete list of codes and translations can be found at www.fda.gov/edrls under Structured Product Labeling Resources.

Start Marketing Date: 09-13-2019 What is the Start Marketing Date?
This is the date that the labeler indicates was the start of its marketing of the drug product.

Listing Expiration Date: 12-31-2020 What is the Listing Expiration Date?
This is the date when the listing record will expire if not updated or certified by the product labeler.

Exclude Flag: N What is the NDC Exclude Flag?
This field indicates whether the product has been removed/excluded from the NDC Directory for failure to respond to FDA’s requests for correction to deficient or non-compliant submissions. Values = ‘Y’ or ‘N’.

* Please review the disclaimer below.

Information for Patients

Tenofovir

Tenofovir is pronounced as (te noe' fo veer)

Why is tenofovir medication prescribed?
Tenofovir is used along with other medications to treat human immunodeficiency virus (HIV) infection in adults and children 2 years of age and older. Tenofovir is also us...
[Read More]

* Please review the disclaimer below.

Tenofovir Disoproxil Fumarate Product Label Images

Tenofovir Disoproxil Fumarate Product Labeling Information

The product labeling information includes all published material associated to a drug. Product labeling documents include information like generic names, active ingredients, ingredient strength dosage, routes of administration, appearance, usage, warnings, inactive ingredients, etc.

Product Labeling Index

Warning: Posttreatment Exacerbation Of Hepatitis

Severe acute exacerbations of hepatitis have been reported in HBV-infected patients who have discontinued anti-hepatitis B therapy, including tenofovir disoproxil fumarate tablets. Hepatic function should be monitored closely with both clinical and laboratory follow-up for at least several months in patients who discontinue anti-hepatitis B therapy, including tenofovir disoproxil fumarate. If appropriate, resumption of anti-hepatitis B therapy may be warranted








[See








Warnings and Precautions (5.1)]








.

1.1 Hiv-1 Infection

  • Tenofovir disoproxil fumarate tablets are indicated in combination with other antiretroviral agents for the treatment of HIV-1 infection in adults and pediatric patients 2 years of age and older.Tenofovir disoproxil fumarate tablets are indicated in combination with other antiretroviral agents for the treatment of HIV-1 infection in adults and pediatric patients 2 years of age and older.The following points should be considered when initiating therapy with tenofovir disoproxil fumarate tablets for the treatment of HIV-1 infection:The following points should be considered when initiating therapy with tenofovir disoproxil fumarate tablets for the treatment of HIV-1 infection:Tenofovir disoproxil fumarate tablets should not be used in combination with ATRIPLA
  • ®, BIKTARVY
  • ®, COMPLERA
  • ®, DESCOVY
  • ®, GENVOYA
  • ®, ODEFSEY
  • ®, STRIBILD
  • ®, TRUVADA
  • ®, or VEMLIDY
  • ® [
  • See
  • Warnings and Precautions (5.4)] .
  • Tenofovir disoproxil fumarate tablets should not be used in combination with ATRIPLA
  • ®, BIKTARVY
  • ®, COMPLERA
  • ®, DESCOVY
  • ®, GENVOYA
  • ®, ODEFSEY
  • ®, STRIBILD
  • ®, TRUVADA
  • ®, or VEMLIDY
  • ® [
  • See
  • Warnings and Precautions (5.4)] .

1.2 Chronic Hepatitis B

  • Tenofovir disoproxil fumarate tablets are indicated for the treatment of chronic hepatitis B in adults and pediatric patients 12 years of age and older
  • . The following points should be considered when initiating therapy with tenofovir disoproxil fumarate tablets for the treatment of chronic hepatitis B infection:The indication in adults is based on safety and efficacy data from treatment of subjects who were nucleoside-treatment-naïve and subjects who were treatment-experienced with documented resistance to lamivudine. Subjects were adults with HBeAg-positive and HBeAg-negative chronic hepatitis B with compensated liver disease
  • [See
  • Clinical Studies (14.2)].
  • Tenofovir disoproxil fumarate tablets were evaluated in a limited number of subjects with chronic hepatitis B and decompensated liver disease
  • [See
  • Adverse Reactions (6.1),
  • Clinical Studies (14.2)]
  • .
  • The numbers of subjects in clinical trials who had adefovir resistance-associated substitutions at baseline were too small to reach conclusions of efficacy
  • [See
  • Microbiology (12.4),
  • Clinical Studies (14.2)].

2.1 Recommended Dose In Adults And Pediatric Patients 12 Years Of Age And Older (35 Kg Or More)

For the treatment of HIV-1 or chronic hepatitis B: The dose is one 300 mg tenofovir disoproxil fumarate tablet once daily taken orally, without regard to food.In the treatment of chronic hepatitis B, the optimal duration of treatment is unknown. Safety and efficacy in pediatric patients with chronic hepatitis B weighing less than 35 kg have not been established.

Other

HIV-1 InfectionFor the treatment of HIV-1 in pediatric patients 2 years of age and older, the recommended oral dose of tenofovir disoproxil fumarate tablets is 8 mg of tenofovir disoproxil fumarate (tenofovir DF) per kilogram of body weight (up to a maximum of 300 mg) once daily administered as tablets.Tenofovir disoproxil fumarate tablets are available as tablets in 300 mg strength for pediatric patients who weigh greater than or equal to 35 kg and who are able to reliably swallow intact tablets. The dose is one tablet once daily taken orally, without regard to food.Table 2 contains dosing recommendations for tenofovir disoproxil fumarate tablets based on body weight. Weight should be monitored periodically and the tenofovir disoproxil fumarate tablets dose adjusted accordingly.Table 2 Dosing Recommendations for Pediatric Patients 2 Years of Age and Older and Weighing At Least 35 kg Using Tenofovir Disoproxil Fumarate tabletsBody Weight


Kilogram (kg)


Tablets Once Daily35 or greater300 mg

Chronic Hepatitis BSafety and efficacy of tenofovir disoproxil fumarate tablets in patients younger than 12 years of age have not been established.

Bone Mineral Density:In clinical trials in HIV-1 infected adults, tenofovir disoproxil fumarate tablets were associated with slightly greater decreases in bone mineral density (BMD) and increases in biochemical markers of bone metabolism, suggesting increased bone turnover relative to comparators. Serum parathyroid hormone levels and 1,25 Vitamin D levels were also higher in subjects receiving tenofovir disoproxil fumarate tablets








[See








Adverse Reactions (6.1)]








.








Clinical trials evaluating tenofovir disoproxil fumarate tablets in pediatric and adolescent subjects were conducted. Under normal circumstances, BMD increases rapidly in pediatric patients. In HIV-1 infected subjects aged 2 years to less than 18 years, bone effects were similar to those observed in adult subjects and suggest increased bone turnover. Total body BMD gain was less in the tenofovir disoproxil fumarate tablets-treated HIV-1 infected pediatric subjects as compared to the control groups. Similar trends were observed in chronic hepatitis B infected adolescent subjects aged 12 years to less than 18 years. In all pediatric trials, skeletal growth (height) appeared to be unaffected








[See








Adverse Reactions (6.1)]








.








The effects of tenofovir disoproxil fumarate tablets-associated changes in BMD and biochemical markers on long-term bone health and future fracture risk are unknown. Assessment of BMD should be considered for adults and pediatric patients who have a history of pathologic bone fracture or other risk factors for osteoporosis or bone loss. Although the effect of supplementation with calcium and vitamin D was not studied, such supplementation may be beneficial for all patients. If bone abnormalities are suspected then appropriate consultation should be obtained.

Mineralization Defects:Cases of osteomalacia associated with proximal renal tubulopathy, manifested as bone pain or pain in extremities and which may contribute to fractures, have been reported in association with the use of tenofovir disoproxil fumarate tablets








[See








Adverse Reactions (6.2)]








. Arthralgias and muscle pain or weakness have also been reported in cases of proximal renal tubulopathy. Hypophosphatemia and osteomalacia secondary to proximal renal tubulopathy should be considered in patients at risk of renal dysfunction who present with persistent or worsening bone or muscle symptoms while receiving products containing tenofovir DF








[See








Warnings and Precautions (5.2)]








.

Treatment-Naïve Patients

Study 903 - Treatment-Emergent Adverse Reactions: The most common adverse reactions seen in a double-blind comparative controlled trial in which 600 treatment-naïve subjects received tenofovir disoproxil fumarate tablets (N=299) or stavudine (N=301) in combination with lamivudine and efavirenz for 144 weeks (Study 903) were mild to moderate gastrointestinal events and dizziness.








Mild adverse reactions (Grade 1) were common with a similar incidence in both arms, and included dizziness, diarrhea, and nausea. Selected treatment-emergent moderate to severe adverse reactions are summarized in Table 4.Table 4 Selected Treatment-Emergent Adverse Reactions








Frequencies of adverse reactions are based on all treatment-emergent adverse events, regardless of relationship to study drug. (Grades 2-4) Reported in ≥5% in Any Treatment Group in Study 903 (0-144 Weeks)








Tenofovir Disoproxil Fumarate Tablets + 3TC + EFVd4T + 3TC + EFVN=299N=301Body as a Whole  Headache14%17%  Pain13%12%  Fever8%7%  Abdominal pain7%12%  Back pain9%8%  Asthenia6%7%Digestive System  Diarrhea11%13%  Nausea8%9%  Dyspepsia4%5%  Vomiting5%9%Metabolic Disorders  Lipodystrophy








Lipodystrophy represents a variety of investigator-described adverse events not a protocol-defined syndrome.1%8%Musculoskeletal  Arthralgia5%7%  Myalgia3%5%Nervous System  Depression11%10%  Insomnia5%8%  Dizziness3%6%  Peripheral neuropathy








Peripheral neuropathy includes peripheral neuritis and neuropathy.1%5%  Anxiety6%6%Respiratory  Pneumonia5%5%Skin and Appendages  Rash event








Rash event includes rash, pruritus, maculopapular rash, urticaria, vesiculobullous rash, and pustular rash.18%12%

Laboratory Abnormalities: With the exception of fasting cholesterol and fasting triglyceride elevations that were more common in the stavudine group (40% and 9%) compared with tenofovir disoproxil fumarate tablets (19% and 1%), respectively, laboratory abnormalities observed in this trial occurred with similar frequency in the tenofovir disoproxil fumarate tablets and stavudine treatment arms. A summary of Grades 3–4 laboratory abnormalities is provided in Table 5.








Table 5 Grades 3–4 Laboratory Abnormalities Reported in ≥1% of tenofovir disoproxil fumarate tablets-Treated Subjects in Study 903 (0-144 Weeks)Tenofovir Disoproxil Fumarate Tablets + 3TC + EFVd4T + 3TC + EFVN=299N=301Any ≥ Grade 3 Laboratory Abnormality36%42%Fasting Cholesterol (>240 mg/dL)19%40%Creatine Kinase (M: >990 U/L; F: >845 U/L)12%12%Serum Amylase (>175 U/L)9%8%AST (M: >180 U/L; F: >170 U/L)5%7%ALT (M: >215 U/L; F: >170 U/L)4%5%Hematuria (>100 RBC/HPF)7%7%Neutrophils (<750/mm








3)








3%1%Fasting Triglycerides (>750 mg/dL)1%9%

Study 934 – Treatment-Emergent Adverse Reactions: In Study 934, 511 antiretroviral-naïve subjects received either tenofovir disoproxil fumarate tablets + EMTRIVA








® administered in combination with efavirenz (N=257) or zidovudine/lamivudine administered in combination with efavirenz (N=254). Adverse reactions observed in this trial were generally consistent with those seen in previous studies in treatment-experienced or treatment-naïve subjects (Table 6).

Changes in Bone Mineral Density In HIV-1 infected adult subjects in Study 903, there was a significantly greater mean percentage decrease from baseline in BMD at the lumbar spine in subjects receiving tenofovir disoproxil fumarate tablets + lamivudine + efavirenz (-2.2% ± 3.9) compared with subjects receiving stavudine + lamivudine + efavirenz (-1.0% ± 4.6) through 144 weeks. Changes in BMD at the hip were similar between the two treatment groups (-2.8% ± 3.5 in the tenofovir disoproxil fumarate tablets group vs. -2.4% ± 4.5 in the stavudine group). In both groups, the majority of the reduction in BMD occurred in the first 24-48 weeks of the trial and this reduction was sustained through Week 144. Twenty-eight percent of tenofovir disoproxil fumarate tablets-treated subjects vs. 21% of the stavudine-treated subjects lost at least 5% of BMD at the spine or 7% of BMD at the hip. Clinically relevant fractures (excluding fingers and toes) were reported in 4 subjects in the tenofovir disoproxil fumarate tablets group and 6 subjects in the stavudine group. In addition, there were significant increases in biochemical markers of bone metabolism (serum bone-specific alkaline phosphatase, serum osteocalcin, serum C telopeptide, and urinary N telopeptide) and higher serum parathyroid hormone levels and 1,25 Vitamin D levels in the tenofovir disoproxil fumarate tablets group relative to the stavudine group; however, except for bone-specific alkaline phosphatase, these changes resulted in values that remained within the normal range








[See








Warnings and Precautions (5.6)]








.








Table 6 Selected Treatment-Emergent Adverse Reactions








Frequencies of adverse reactions are based on all treatment-emergent adverse events, regardless of relationship to study drug. (Grades 2-4) Reported in ≥5% in Any Treatment Group in Study 934 (0-144 Weeks)








Tenofovir Disoproxil Fumarate Tablets








From Weeks 96 to 144 of the trial, subjects received TRUVADA with efavirenz in place of tenofovir disoproxil fumarate tablets + EMTRIVA with efavirenz. + FTC + EFV








AZT/3TC + EFVN=257N=254Gastrointestinal Disorder  Diarrhea9%5%  Nausea9%7%  Vomiting2%5%General Disorders and Administration Site Condition  Fatigue9%8%Infections and Infestations  Sinusitis8%4%  Upper respiratory tract infections8%5%  Nasopharyngitis5%3%Nervous System Disorders  Headache6%5%  Dizziness8%7%Psychiatric Disorders  Depression9%7%  Insomnia5%7%Skin and Subcutaneous Tissue Disorders  Rash event








Rash event includes rash, exfoliative rash, rash generalized, rash macular, rash maculopapular, rash pruritic, and rash vesicular.7%9%

Laboratory Abnormalities: Laboratory abnormalities observed in this trial were generally consistent with those seen in previous trials (Table 7).








Table 7 Significant Laboratory Abnormalities Reported in ≥1% of Subjects in Any Treatment Group in Study 934 (0-144 Weeks)Tenofovir Disoproxil Fumarate Tablets








From Weeks 96 to 144 of the trial, subjects received TRUVADA with efavirenz in place of tenofovir disoproxil fumarate tablets + EMTRIVA with efavirenz. + FTC + EFV








AZT/3TC + EFVN=257N=254Any ≥ Grade 3 Laboratory Abnormality30%26%Fasting Cholesterol (>240 mg/dL)22%24%Creatine Kinase (M: >990 U/L; F: >845 U/L)9%7%Serum Amylase (>175 U/L)8%4%Alkaline Phosphatase (>550 U/L)1%0%AST (M: >180 U/L; F: >170 U/L)3%3%ALT (M: >215 U/L; F: >170 U/L)2%3%Hemoglobin (<8.0 mg/dL)0%4%Hyperglycemia (>250 mg/dL)2%1%Hematuria (>75 RBC/HPF)3%2%Glycosuria (≥3+)<1%1%Neutrophils (<750/mm








3)








3%5%Fasting Triglycerides (>750 mg/dL)4%2%

Treatment-Experienced Patients

Treatment-Emergent Adverse Reactions: The adverse reactions seen in treatment-experienced subjects were generally consistent with those seen in treatment-naïve subjects including mild to moderate gastrointestinal events, such as nausea, diarrhea, vomiting, and flatulence. Less than 1% of subjects discontinued participation in the clinical trials due to gastrointestinal adverse reactions (Study 907).








A summary of moderate to severe treatment-emergent adverse reactions that occurred during the first 48 weeks of Study 907 is provided in Table 8.Table 8 Selected Treatment-Emergent Adverse Reactions








Frequencies of adverse reactions are based on all treatment-emergent adverse events, regardless of relationship to study drug. (Grades 2-4) Reported in ≥3% in Any Treatment Group in Study 907 (0-48 Weeks)








Tenofovir Disoproxil Fumarate Tablets








(N=368)








(Week 0-24)








Placebo








(N=182)








(Week 0-24)








Tenofovir Disoproxil Fumarate Tablets








(N=368)








(Week 0-48)








Placebo Crossover to Tenofovir Disoproxil Fumarate Tablets








(N=170)








(Week 24-48)








Body as a Whole  Asthenia7%6%11%1%  Pain7%7%12%4%  Headache5%5%8%2%  Abdominal pain4%3%7%6%  Back pain3%3%4%2%  Chest pain3%1%3%2%  Fever2%2%4%2%Digestive System  Diarrhea11%10%16%11%  Nausea8%5%11%7%  Vomiting4%1%7%5%  Anorexia3%2%4%1%  Dyspepsia3%2%4%2%  Flatulence3%1%4%1%Respiratory  Pneumonia2%0%3%2%Nervous System  Depression4%3%8%4%  Insomnia3%2%4%4%  Peripheral neuropathy








Peripheral neuropathy includes peripheral neuritis and neuropathy.3%3%5%2%  Dizziness1%3%3%1%Skin and Appendage  Rash event








Rash event includes rash, pruritus, maculopapular rash, urticaria, vesiculobullous rash, and pustular rash.5%4%7%1%  Sweating3%2%3%1%Musculoskeletal  Myalgia3%3%4%1%Metabolic  Weight loss2%1%4%2%

Laboratory Abnormalities: Laboratory abnormalities observed in this trial occurred with similar frequency in the tenofovir disoproxil fumarate tablets and placebo-treated groups. A summary of Grades 3–4 laboratory abnormalities is provided in Table 9.








Table 9 Grades 3–4 Laboratory Abnormalities Reported in ≥1% of Tenofovir Disoproxil Fumarate Tablets-Treated Subjects in Study 907 (0–48 Weeks)Tenofovir Disoproxil Fumarate Tablets








(N=368)








(Week 0–24)








Placebo








(N=182)








(Week 0–24)








Tenofovir Disoproxil Fumarate Tablets








(N=368)








(Week 0–48)








Placebo Crossover to Tenofovir Disoproxil Fumarate Tablets








(N=170)








(Week 24–48)








Any ≥ Grade 3 Laboratory Abnormality25%38%35%34%Triglycerides (>750 mg/dL)8%13%11%9%Creatine Kinase








(M: >990 U/L; F: >845 U/L)








7%14%12%12%Serum Amylase (>175 U/L)6%7%7%6%Glycosuria (≥3+)3%3%3%2%AST (M: >180 U/L; F: >170 U/L)3%3%4%5%ALT (M: >215 U/L; F: >170 U/L)2%2%4%5%Serum Glucose (>250 U/L)2%4%3%3%Neutrophils (<750/mm








3)








1%1%2%1%

Clinical Trials in Pediatric Subjects 2 Years of Age and Older with HIV-1 InfectionAssessment of adverse reactions is based on two randomized trials (Studies 352 and 321) in 184 HIV-1 infected pediatric subjects (2 to less than 18 years of age) who received treatment with tenofovir disoproxil fumarate tablets (N=93) or placebo/active comparator (N=91) in combination with other antiretroviral agents for 48 weeks. The adverse reactions observed in subjects who received treatment with tenofovir disoproxil fumarate tablets were consistent with those observed in clinical trials in adults. Eighty-nine pediatric subjects (2 to less than 12 years of age) received tenofovir disoproxil fumarate tablets in Study 352 for a median exposure of 104 weeks. Of these, 4 subjects discontinued from the trial due to adverse reactions consistent with proximal renal tubulopathy. Three of these 4 subjects presented with hypophosphatemia and also had decreases in total body or spine BMD Z score








[See








Warnings and Precautions (5.6)]








.

Changes in Bone Mineral Density:Clinical trials in HIV-1 infected children and adolescents evaluated BMD changes. In Study 321 (12 to less than 18 years), the mean rate of BMD gain at Week 48 was less in the tenofovir disoproxil fumarate tablets compared to the placebo treatment group. Six tenofovir disoproxil fumarate tablets-treated subjects and one placebo-treated subject had significant (greater than 4%) lumbar spine BMD loss at Week 48. Changes from baseline BMD Z-scores were –0.341 for lumbar spine and –0.458 for total body in the 28 subjects who were treated with tenofovir disoproxil fumarate tablets for 96 weeks. In Study 352 (2 to less than 12 years), the mean rate of BMD gain in lumbar spine at Week 48 was similar between the tenofovir disoproxil fumarate tablets and the d4T or AZT treatment groups. Total body BMD gain was less in the tenofovir disoproxil fumarate tablets compared to the d4T or AZT treatment groups. One tenofovir disoproxil fumarate tablets-treated subject and none of the d4T- or AZT-treated subjects experienced significant (greater than 4%) lumbar spine BMD loss at Week 48. Changes from baseline in BMD Z scores were –0.012 for lumbar spine and –0.338 for total body in the 64 subjects who were treated with tenofovir disoproxil fumarate tablets for 96 weeks. In both trials, skeletal growth (height) appeared to be unaffected


[See


Warnings and Precautions (5.6)]


.

Treatment-Emergent Adverse Reactions: In controlled clinical trials in 641 subjects with chronic hepatitis B (0102 and 0103), more subjects treated with tenofovir disoproxil fumarate tablets during the 48-week double-blind period experienced nausea: 9% with tenofovir disoproxil fumarate tablets versus 2% with HEPSERA. Other treatment-emergent adverse reactions reported in more than 5% of subjects treated with tenofovir disoproxil fumarate tablets included: abdominal pain, diarrhea, headache, dizziness, fatigue, nasopharyngitis, back pain, and skin rash.








During the open-label phase of treatment with tenofovir disoproxil fumarate tablets (weeks 48–384) in Studies 0102 and 0103, 2% of subjects (13/585) experienced a confirmed increase in serum creatinine of 0.5 mg/dL from baseline. No significant change in the tolerability profile was observed with continued treatment for up to 384 weeks.

Clinical Trials in Adult Subjects with Chronic Hepatitis B and Decompensated Liver DiseaseIn a small randomized, double-blind, active-controlled trial (0108), subjects with CHB and decompensated liver disease received treatment with tenofovir disoproxil fumarate tablets or other antiviral drugs for up to 48 weeks








[See








Clinical Studies (14.2)]








. Among the 45 subjects receiving tenofovir disoproxil fumarate tablets, the most frequently reported treatment-emergent adverse reactions of any severity were abdominal pain (22%), nausea (20%), insomnia (18%), pruritus (16%), vomiting (13%), dizziness (13%), and pyrexia (11%). Two of 45 (4%) subjects died through Week 48 of the trial due to progression of liver disease. Three of 45 (7%) subjects discontinued treatment due to an adverse event. Four of 45 (9%) subjects experienced a confirmed increase in serum creatinine of 0.5 mg/dL (1 subject also had a confirmed serum phosphorus less than 2 mg/dL through Week 48). Three of these subjects (each of whom had a Child-Pugh score greater than or equal to 10 and MELD score greater than or equal to 14 at entry) developed renal failure. Because both tenofovir disoproxil fumarate tablets and decompensated liver disease may have an impact on renal function, the contribution of tenofovir disoproxil fumarate tablets to renal impairment in this population is difficult to ascertain.








One of 45 subjects experienced an on-treatment hepatic flare during the 48-week trial.

Clinical Trials in Pediatric Subjects 12 Years of Age and Older with Chronic Hepatitis BAssessment of adverse reactions is based on one randomized study (Study GS-US-174-0115) in 106 pediatric subjects (12 to less than 18 years of age) infected with chronic hepatitis B receiving treatment with tenofovir disoproxil fumarate tablets (N = 52) or placebo (N = 54) for 72 weeks. The adverse reactions observed in pediatric subjects who received treatment with tenofovir disoproxil fumarate tablets were consistent with those observed in clinical trials of tenofovir disoproxil fumarate tablets in adults.In this study, both the tenofovir disoproxil fumarate tablets and placebo treatment arms experienced an overall increase in mean lumbar spine BMD over 72 weeks, as expected for an adolescent population. The BMD gains from baseline to Week 72 in lumbar spine and total body BMD in tenofovir disoproxil fumarate tablets-treated subjects (+5% and +3%, respectively) were less than the BMD gains observed in placebo-treated subjects (+8% and +5%, respectively). Three subjects in the tenofovir disoproxil fumarate tablets group and two subjects in the placebo group had significant (greater than 4%) lumbar spine BMD loss at Week 72. At baseline, mean BMD Z-scores in subjects randomized to tenofovir disoproxil fumarate tablets were −0.43 for lumbar spine and −0.20 for total body, and mean BMD Z-scores in subjects randomized to placebo were −0.28 for lumbar spine and −0.26 for total body. In subjects receiving tenofovir disoproxil fumarate tablets for 72 weeks, the mean change in BMD Z-score was −0.05 for lumbar spine and −0.15 for total body compared to +0.07 and +0.06, respectively, in subjects receiving placebo. As observed in pediatric studies of HIV-infected patients, skeletal growth (height) appeared to be unaffected








[See








Warnings and Precautions (5.6)]








.

Antiretroviral Pregnancy Registry: To monitor fetal outcomes of pregnant women exposed to tenofovir disoproxil fumarate tablets, an Antiretroviral Pregnancy Registry has been established. Healthcare providers are encouraged to register patients by calling 1-800-258-4263.

Risk Summary

Pediatric Patients 2 Years of Age and Older with HIV-1 infectionThe safety of tenofovir disoproxil fumarate tablets in pediatric patients aged 2 to less than 18 years is supported by data from two randomized trials in which tenofovir disoproxil fumarate tablets were administered to HIV-1 infected treatment-experienced subjects. In addition, the pharmacokinetic profile of tenofovir in patients 2 to less than 18 years of age at the recommended doses was similar to that found to be safe and effective in adult clinical trials








[See








Clinical Pharmacology (12.3)]








.








In Study 352, 92 treatment-experienced subjects 2 to less than 12 years of age with stable, virologic suppression on stavudine- or zidovudine-containing regimen were randomized to either replace stavudine or zidovudine with tenofovir disoproxil fumarate tablets (N = 44) or continue their original regimen (N = 48) for 48 weeks. Five additional subjects over the age of 12 were enrolled and randomized (tenofovir disoproxil fumarate tablets N=4, original regimen N=1) but are not included in the efficacy analysis. After 48 weeks, all eligible subjects were allowed to continue in the study receiving open-label tenofovir disoproxil fumarate tablets. At Week 48, 89% of subjects in the tenofovir disoproxil fumarate tablets treatment group and 90% of subjects in the stavudine or zidovudine treatment group had HIV-1 RNA concentrations less than 400 copies/mL. During the 48 week randomized phase of the study, 1 subject in the tenofovir disoproxil fumarate tablets group discontinued the study prematurely because of virologic failure/lack of efficacy and 3 subjects (2 subjects in the tenofovir disoproxil fumarate tablets group and 1 subject in the stavudine or zidovudine group) discontinued for other reasons.In Study 321, 87 treatment-experienced subjects 12 to less than 18 years of age were treated with tenofovir disoproxil fumarate tablets (N=45) or placebo (N=42) in combination with an optimized background regimen (OBR) for 48 weeks. The mean baseline CD4 cell count was 374 cells/mm








3 and the mean baseline plasma HIV-1 RNA was 4.6 log








10 copies/mL. At baseline, 90% of subjects harbored NRTI resistance-associated substitutions in their HIV-1 isolates. Overall, the trial failed to show a difference in virologic response between the tenofovir disoproxil fumarate tablets and placebo treatment groups. Subgroup analyses suggest the lack of difference in virologic response may be attributable to imbalances between treatment arms in baseline viral susceptibility to tenofovir disoproxil fumarate tablets and OBR.








Although changes in HIV-1 RNA in these highly treatment-experienced subjects were less than anticipated, the comparability of the pharmacokinetic and safety data to that observed in adults supports the use of tenofovir disoproxil fumarate tablets in pediatric patients 12 years of age and older who weigh greater than or equal to 35 kg and whose HIV-1 isolate is expected to be sensitive to tenofovir disoproxil fumarate tablets.








[See








Warnings and Precautions (5.6),








Adverse Reactions (6.1), and








Clinical Pharmacology (12.3)].








Safety and effectiveness of tenofovir disoproxil fumarate tablets in pediatric patients younger than 2 years of age with HIV-1 infection have not been established.

Pediatric Patients 12 Years of Age and Older with Chronic Hepatitis BIn Study 115, 106 HBeAg negative (9%) and positive (91%) subjects aged 12 to less than 18 years with chronic HBV infection were randomized to receive blinded treatment with tenofovir disoproxil fumarate tablets 300 mg (N = 52) or placebo (N = 54) for 72 weeks. At study entry, the mean HBV DNA was 8.1 log








10 copies/mL and mean ALT was 101 U/L. Of 52 subjects treated with tenofovir disoproxil fumarate tablets, 20 subjects were nucleos(t)ide-naïve and 32 subjects were nucleos(t)ide-experienced. Thirty-one of the 32 nucleos(t)ide-experienced subjects had prior lamivudine experience. At Week 72, 88% (46/52) of subjects in the tenofovir disoproxil fumarate tablets group and 0% (0/54) of subjects in the placebo group had HBV DNA <400 copies/mL (69 IU/mL). Among subjects with abnormal ALT at baseline, 74% (26/35) of subjects receiving tenofovir disoproxil fumarate tablets had normalized ALT at Week 72 compared to 31% (13/42) in the placebo group. One tenofovir disoproxil fumarate tablets-treated subject experienced sustained HBsAg-loss and seroconversion to anti-HBs during the first 72 weeks of study participation.








Safety and effectiveness of tenofovir disoproxil fumarate tablets in pediatric patients younger than 12 years of age or less than 35 kg with chronic hepatitis B have not been established.

AbsorptionTenofovir disoproxil fumarate tablets are a water soluble diester prodrug of the active ingredient tenofovir. The oral bioavailability of tenofovir from tenofovir disoproxil fumarate tablets in fasted subjects is approximately 25%. Following oral administration of a single dose of tenofovir disoproxil fumarate tablets 300 mg to HIV-1 infected subjects in the fasted state, maximum serum concentrations (C








max) are achieved in 1.0 ± 0.4 hrs. C








max and AUC values are 0.30 ± 0.09 µg/mL and 2.29 ± 0.69 µg








∙hr/mL, respectively.








The pharmacokinetics of tenofovir are dose proportional over a tenofovir disoproxil fumarate tablets dose range of 75 to 600 mg and are not affected by repeated dosing.

DistributionIn vitro binding of tenofovir to human plasma or serum proteins is less than 0.7 and 7.2%, respectively, over the tenofovir concentration range 0.01 to 25 µg/mL. The volume of distribution at steady-state is 1.3 ± 0.6 L/kg and 1.2 ± 0.4 L/kg, following intravenous administration of tenofovir 1.0 mg/kg and 3.0 mg/kg.

Metabolism and EliminationIn vitro studies indicate that neither tenofovir disoproxil nor tenofovir are substrates of CYP enzymes.Following IV administration of tenofovir, approximately 70–80% of the dose is recovered in the urine as unchanged tenofovir within 72 hours of dosing. Following single dose, oral administration of tenofovir disoproxil fumarate tablets, the terminal elimination half-life of tenofovir is approximately 17 hours. After multiple oral doses of tenofovir disoproxil fumarate tablets 300 mg once daily (under fed conditions), 32 ± 10% of the administered dose is recovered in urine over 24 hours.Tenofovir is eliminated by a combination of glomerular filtration and active tubular secretion. There may be competition for elimination with other compounds that are also renally eliminated.

Effects of Food on Oral AbsorptionAdministration of tenofovir disoproxil fumarate tablets 300 mg tablets following a high-fat meal (~700 to 1000 kcal containing 40 to 50% fat) increases the oral bioavailability, with an increase in tenofovir AUC








0–∞ of approximately 40% and an increase in C








max of approximately 14%. However, administration of tenofovir disoproxil fumarate tablets with a light meal did not have a significant effect on the pharmacokinetics of tenofovir when compared to fasted administration of the drug. Food delays the time to tenofovir C








max by approximately 1 hour. C








max and AUC of tenofovir are 0.33 ± 0.12 µg/mL and 3.32 ± 1.37 µg








∙hr/mL following multiple doses of tenofovir disoproxil fumarate tablets 300 mg once daily in the fed state, when meal content was not controlled.

Special Populations

Race: There were insufficient numbers from racial and ethnic groups other than Caucasian to adequately determine potential pharmacokinetic differences among these populations.

Gender: Tenofovir pharmacokinetics are similar in male and female subjects.

Pediatric Patients 2 Years of Age and Older: Steady-state pharmacokinetics of tenofovir were evaluated in 31 HIV-1 infected pediatric subjects 2 to less than 18 years (Table 12). Tenofovir exposure achieved in these pediatric subjects receiving oral once daily doses of tenofovir disoproxil fumarate tablets 300 mg was similar to exposures achieved in adults receiving once-daily doses of tenofovir disoproxil fumarate tablets 300 mg.


Table 12 Mean (± SD) Tenofovir Pharmacokinetic Parameters by Age Groups for HIV-1-infected Pediatric Patients Dose and Formulation   300 mg Tablet 12 to <18 Years (N=8) C


max (µg/mL)


 0.38 ± 0.13 AUC


tau (µg∙hr/mL)


 3.39 ± 1.22Tenofovir exposures in 52 HBV-infected pediatric subjects (12 to less than 18 years of age) receiving oral once-daily doses of tenofovir disoproxil fumarate tablets 300 mg tablet were comparable to exposures achieved in HIV-1 infected adults and adolescents receiving once-daily doses of 300 mg.

Geriatric Patients: Pharmacokinetic trials have not been performed in the elderly (65 years and older).

Patients with Impaired Renal Function: The pharmacokinetics of tenofovir are altered in subjects with renal impairment


[See


Warnings and Precautions (5.2)]


. In subjects with creatinine clearance below 50 mL/min or with end-stage renal disease (ESRD) requiring dialysis, C


max, and AUC


0-∞ of tenofovir were increased (Table 13). It is recommended that the dosing interval for tenofovir disoproxil fumarate tablets be modified in patients with estimated creatinine clearance below 50 mL/min or in patients with ESRD who require dialysis


[See


Dosage and Administration (2.3)]


.


Table 13 Pharmacokinetic Parameters (Mean ± SD) of Tenofovir


300 mg, single dose of tenofovir disoproxil fumarate tablets in Subjects with Varying Degrees of Renal Function


Baseline Creatinine Clearance (mL/min)>80


(N=3)


50-80


(N=10)


30-49


(N=8)


12-29


(N=11)


C


max (µg/mL)


0.34 ± 0.030.33 ± 0.060.37 ± 0.160.60 ± 0.19AUC


0-∞ (µg


∙hr/mL)


2.18 ± 0.263.06 ± 0.936.01 ± 2.5015.98 ± 7.22CL/F (mL/min)1043.7 ± 115.4807.7 ± 279.2444.4 ± 209.8177.0 ± 97.1CL


renal (mL/min)


243.5 ± 33.3168.6 ± 27.5100.6 ± 27.543.0 ± 31.2Tenofovir is efficiently removed by hemodialysis with an extraction coefficient of approximately 54%. Following a single 300 mg dose of tenofovir disoproxil fumarate tablets, a four-hour hemodialysis session removed approximately 10% of the administered tenofovir dose.

Patients with Hepatic Impairment: The pharmacokinetics of tenofovir following a 300 mg single dose of tenofovir disoproxil fumarate tablets have been studied in non-HIV infected subjects with moderate to severe hepatic impairment. There were no substantial alterations in tenofovir pharmacokinetics in subjects with hepatic impairment compared with unimpaired subjects. No change in tenofovir disoproxil fumarate tablets dosing is required in patients with hepatic impairment.

Assessment of Drug InteractionsAt concentrations substantially higher (~300-fold) than those observed in vivo, tenofovir did not inhibit in vitro drug metabolism mediated by any of the following human CYP isoforms: CYP3A4, CYP2D6, CYP2C9, or CYP2E1. However, a small (6%) but statistically significant reduction in metabolism of CYP1A substrate was observed. Based on the results of in vitro experiments and the known elimination pathway of tenofovir, the potential for CYP-mediated interactions involving tenofovir with other medicinal products is low.Tenofovir disoproxil fumarate tablets have been evaluated in healthy volunteers in combination with other antiretroviral and potential concomitant drugs. Tables 14 and 15 summarize pharmacokinetic effects of coadministered drug on tenofovir pharmacokinetics and effects of tenofovir disoproxil fumarate tablets on the pharmacokinetics of coadministered drug. TDF is a substrate of P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP) transporters. When TDF is coadministered with an inhibitor of these transporters, an increase in absorption may be observed.No clinically significant drug interactions have been observed between tenofovir disoproxil fumarate tablets and efavirenz, methadone, nelfinavir, oral contraceptives, ribavirin, or sofosbuvir.Table 14 Drug Interactions: Changes in Pharmacokinetic Parameters for Tenofovir


Subjects received tenofovir disoproxil fumarate tablets 300 mg once daily. in the Presence of the Coadministered Drug


Coadministered DrugDose of Coadministered Drug (mg)N% Change of Tenofovir Pharmacokinetic Parameters


Increase = ↑; Decrease = ↓; No Effect = ⇔ (90% CI)


C


maxAUCC


minAtazanavir


Reyataz Prescribing Information.400 once daily × 14 days33↑ 14


(↑ 8 to ↑ 20)


↑ 24


(↑ 21 to ↑ 28)


↑ 22


(↑ 15 to ↑ 30)


Atazanavir/


Ritonavir


300/100 once daily12↑ 34


(↑ 20 to ↑ 51)


↑ 37


(↑ 30 to ↑ 45)


↑ 29


(↑ 21 to ↑ 36)


Darunavir/


Ritonavir


d. Prezista Prescribing Information.300/100 twice daily12↑ 24


(↑ 8 to ↑ 42)


↑ 22


(↑ 10 to ↑ 35)


↑ 37


(↑ 19 to ↑ 57)


Indinavir800 three times daily × 7 days13↑ 14


(↓ 3 to ↑ 33)


⇔⇔Ledipasvir/


Sofosbuvir


e. Data generated from simultaneous dosing with HARVONI (ledipasvir/sofosbuvir). Staggered administration (12 hours apart) provided similar results.,Comparison based on exposures when administered as atazanavir/ritonavir + emtricitabine/tenofovir DF.90/400 once daily × 10 days24↑ 47


(↑ 37 to ↑ 58)


↑ 35


(↑ 29 to ↑ 42 )


↑ 47


(↑ 38 to ↑ 57)


Ledipasvir/


Sofosbuvir


,Comparison based on exposures when administered as darunavir/ritonavir + emtricitabine/tenofovir DF. 23↑ 64


(↑ 54 to ↑ 74)


↑ 50


(↑ 42 to ↑ 59)


↑ 59


(↑ 49 to ↑ 70)


Ledipasvir/


Sofosbuvir


Study conducted with ATRIPLA (efavirenz/emtricitabine/tenofovir DF) coadministered with HARVONI; coadministration with HARVONI also results in comparable increases in tenofovir exposure when TDF is administered as COMPLERA, or TRUVADA + dolutegravir.90/400 once daily × 14 days15↑ 79


(↑ 56 to ↑ 104)


↑ 98


(↑ 77 to ↑ 123)


↑ 163


(↑ 132 to↑197)


Lopinavir/


Ritonavir


400/100 twice daily × 14 days24⇔↑ 32


(↑ 25 to ↑ 38)


↑ 51


(↑ 37 to ↑ 66)


Saquinavir/


Ritonavir


1000/100 twice daily × 14 days35⇔⇔↑ 23


(↑ 16 to ↑ 30)


Sofosbuvir


Study conducted with ATRIPLA coadministered with SOVALDI
® (sofosbuvir).
400 single dose16↑ 25


(↑ 8 to ↑ 45)


⇔⇔Sofosbuvir/


Velpatasvir


Study conducted with COMPLERA coadministered with EPCLUSA; coadministration with EPCLUSA also results in comparable increases in tenofovir exposures when TDF is administered as ATRIPLA, STRIBILD, TRUVADA + atazanavir/ritonavir, or TRUVADA + darunavir/ritonavir.400/100 once daily24↑ 44


(↑ 33 to ↑ 55)


↑ 40


(↑ 34 to ↑ 46)


↑ 84


(↑ 76 to ↑ 92)


Sofosbuvir/


Velpatasvir


Administered as raltegravir + emtricitabine/tenofovir DF.400/100 once daily30↑ 46


(↑ 39 to ↑ 54)


↑ 40


(↑ 34 to ↑ 45)


↑ 70


(↑ 61 to ↑ 79)


Sofosbuvir/


Velpatasvir/


Voxilaprevir


l. Comparison based on exposures when administered as darunavir + ritonavir + emtricitabine/tenofovir DF.400/100/100 + Voxilaprevir


Study conducted with additional voxilaprevir 100 mg to achieve voxilaprevir exposures expected in HCV-infected patients. 100 once daily


29↑ 48


(↑ 36 to ↑ 61)


↑ 39


(↑ 32 to↑ 46)


↑ 47


(↑ 38 to ↑ 56)


Tacrolimus0.05 mg/kg twice daily × 7 days21↑ 13


(↑ 1 to ↑ 27)


⇔⇔Tipranavir/


Ritonavir


Aptivus Prescribing Information.500/100 twice daily22↓ 23


(↓ 32 to ↓ 13)


↓ 2


(↓ 9 to ↑ 5)


↑ 7


(↓ 2 to ↑ 17)


750/200 twice daily (23 doses)20↓ 38


(↓ 46 to ↓ 29)


↑ 2


(↓ 6 to ↑ 10)


↑ 14


(↑ 1 to ↑ 27)


No effect on the pharmacokinetic parameters of the following coadministered drugs was observed with tenofovir disoproxil fumarate tablets: abacavir, didanosine (buffered tablets), emtricitabine, entecavir, and lamivudine.Table 15 Drug Interactions: Changes in Pharmacokinetic Parameters for Coadministered Drug in the Presence of Tenofovir Disoproxil Fumarate Tablets Coadministered DrugDose of Coadministered Drug (mg)N% Change of Coadministered Drug Pharmacokinetic Parameters


Increase = ↑; Decrease = ↓; No Effect = ⇔; NA = Not Applicable (90% CI)


C


maxAUCC


minAbacavir300 once8↑ 12


(↓ 1 to ↑ 26)


⇔NAAtazanavir


Reyataz Prescribing Information.400 once daily × 14 days34↓ 21


(↓ 27 to ↓ 14)


↓ 25


(↓ 30 to ↓ 19)


↓ 40


(↓ 48 to ↓ 32)


Atazanavir


Atazanavir/ Ritonavir 300/100 once daily × 42 days10↓ 28


(↓ 50 to ↑ 5)


↓ 25


In HIV-infected subjects, addition of tenofovir DF to atazanavir 300 mg plus ritonavir 100 mg, resulted in AUC and C
min values of atazanavir that were 2.3- and 4-fold higher than the respective values observed for atazanavir 400 mg when given alone.
(↓ 42 to ↓ 3)


↓ 23


(↓ 46 to ↑ 10)


Darunavir


Prezista Prescribing Information.Darunavir/Ritonavir 300/100 once daily12↑ 16


(↓ 6 to ↑ 42)


↑ 21


(↓ 5 to ↑ 54)


↑ 24


(↓ 10 to ↑ 69)


Didanosine


Videx EC Prescribing Information. Subjects received didanosine enteric-coated capsules.250 once, simultaneously with tenofovir disoproxil fumarate tablets and a light meal


373 kcal, 8.2 g fat33↓ 20


Compared with didanosine (enteric-coated) 400 mg administered alone under fasting conditions.(↓ 32 to ↓ 7)





NAEmtricitabine200 once daily × 7 days17⇔⇔↑ 20


(↑ 12 to ↑ 29)


Entecavir1 mg once daily × 10 days28⇔↑ 13


(↑ 11 to ↑ 15)


⇔Indinavir800 three times daily × 7 days12 ↓ 11


(↓ 30 to ↑ 12)


⇔⇔Lamivudine150 twice daily × 7 days15↓ 24


(↓ 34 to ↓ 12)


⇔⇔LopinavirLopinavir/Ritonavir 400/100 twice daily × 14 days24⇔⇔⇔Ritonavir⇔⇔⇔SaquinavirSaquinavir/Ritonavir 1000/100 twice daily × 14 days32↑ 22


(↑ 6 to ↑ 41)


↑ 29


Increases in AUC and C
min are not expected to be clinically relevant; hence no dose adjustments are required when tenofovir DF and ritonavir-boosted saquinavir are coadministered.
(↑ 12 to ↑ 48)


↑ 47


(↑ 23 to ↑ 76)


Ritonavir⇔⇔↑ 23


(↑ 3 to ↑ 46)


Tacrolimus0.05 mg/kg twice daily × 7 days21⇔⇔⇔Tipranavir


Aptivus Prescribing Information.Tipranavir/Ritonavir 500/100 twice daily22↓ 17


(↓ 26 to ↓ 6)


↓ 18


(↓ 25 to ↓ 9)


↓ 21


(↓ 30 to ↓ 10)


Tipranavir/Ritonavir 750/200 twice daily (23 doses)20↓ 11


(↓ 16 to ↓ 4)


↓ 9


(↓ 15 to ↓ 3)


↓ 12


(↓ 22 to 0)

Mechanism of ActionTenofovir DF is an acyclic nucleoside phosphonate diester analog of adenosine monophosphate. Tenofovir DF requires initial diester hydrolysis for conversion to tenofovir and subsequent phosphorylations by cellular enzymes to form tenofovir diphosphate, an obligate chain terminator. Tenofovir diphosphate inhibits the activity of HIV-1 reverse transcriptase and HBV reverse transcriptase by competing with the natural substrate deoxyadenosine 5'-triphosphate and, after incorporation into DNA, by DNA chain termination. Tenofovir diphosphate is a weak inhibitor of mammalian DNA polymerases α, β, and mitochondrial DNA polymerase γ.

Antiviral ActivityThe antiviral activity of tenofovir against laboratory and clinical isolates of HIV-1 was assessed in lymphoblastoid cell lines, primary monocyte/macrophage cells and peripheral blood lymphocytes. The EC








50 (50% effective concentration) values for tenofovir were in the range of 0.04 µM to 8.5 µM. In drug combination studies, tenofovir was not antagonistic with nucleoside reverse transcriptase inhibitors (abacavir, didanosine, lamivudine, stavudine, zalcitabine, zidovudine), non-nucleoside reverse transcriptase inhibitors (delavirdine, efavirenz, nevirapine), and protease inhibitors (amprenavir, indinavir, nelfinavir, ritonavir, saquinavir). Tenofovir displayed antiviral activity in cell culture against HIV-1 clades A, B, C, D, E, F, G, and O (EC








50 values ranged from 0.5 µM to 2.2 µM) and strain-specific activity against HIV-2 (EC








50 values ranged from 1.6 µM to 5.5 µM).

ResistanceHIV-1 isolates with reduced susceptibility to tenofovir have been selected in cell culture. These viruses expressed a K65R substitution in reverse transcriptase and showed a 2- to 4- fold reduction in susceptibility to tenofovir. In addition, a K70E substitution in HIV-1 reverse transcriptase has been selected by tenofovir and results in low-level reduced susceptibility to tenofovir.In Study 903 of treatment-naïve subjects (tenofovir disoproxil fumarate tablets + lamivudine + efavirenz versus stavudine + lamivudine + efavirenz)








[See








Clinical Studies (14.1)]








, genotypic analyses of isolates from subjects with virologic failure through Week 144 showed development of efavirenz and lamivudine resistance-associated substitutions to occur most frequently and with no difference between the treatment arms. The K65R substitution occurred in 8/47 (17%) of analyzed patient isolates in the tenofovir disoproxil fumarate tablets arm and in 2/49 (4%) of analyzed patient isolates in the stavudine arm. Of the 8 subjects whose virus developed K65R in the tenofovir disoproxil fumarate tablets arm through 144 weeks, 7 occurred in the first 48 weeks of treatment and one at Week 96. One patient in the tenofovir disoproxil fumarate tablets arm developed the K70E substitution in the virus. Other substitutions resulting in resistance to tenofovir disoproxil fumarate tablets were not identified in this trial.








In Study 934 of treatment-naïve subjects (Tenofovir disoproxil fumarate tablets + EMTRIVA + efavirenz versus zidovudine (AZT)/lamivudine (3TC) + efavirenz)








[See








Clinical Studies (14.1)]








, genotypic analysis performed on HIV-1 isolates from all confirmed virologic failure subjects with greater than 400 copies/mL of HIV-1 RNA at Week 144 or early discontinuation showed development of efavirenz resistance-associated substitutions occurred most frequently and was similar between the two treatment arms. The M184V substitution, associated with resistance to EMTRIVA and lamivudine, was observed in 2/19 of analyzed subject isolates in the tenofovir disoproxil fumarate tablets + EMTRIVA group and in 10/29 of analyzed subject isolates in the zidovudine/lamivudine group. Through 144 weeks of Study 934, no subjects have developed a detectable K65R substitution in their HIV-1 as analyzed through standard genotypic analysis.

Cross ResistanceCross resistance among certain reverse transcriptase inhibitors has been recognized. The K65R and K70E substitutions selected by tenofovir are also selected in some HIV-1 infected subjects treated with abacavir or didanosine. HIV-1 isolates with this substitution also show reduced susceptibility to emtricitabine and lamivudine. Therefore, cross-resistance among these drugs may occur in patients whose virus harbors the K65R or K70E substitution. HIV-1 isolates from subjects (N=20) whose HIV-1 expressed a mean of three zidovudine-associated reverse transcriptase substitutions (M41L, D67N, K70R, L210W, T215Y/F, or K219Q/E/N), showed a 3.1-fold decrease in the susceptibility to tenofovir.In Studies 902 and 907 conducted in treatment-experienced subjects (Tenofovir disoproxil fumarate tablets + Standard Background Therapy (SBT) compared to placebo + SBT)


[See


Clinical Studies (14.1)]


, 14/304 (5%) of the tenofovir disoproxil fumarate tablets-treated subjects with virologic failure through Week 96 had greater than 1.4-fold (median 2.7-fold) reduced susceptibility to tenofovir. Genotypic analysis of the baseline and failure isolates showed the development of the K65R substitution in the HIV-1 reverse transcriptase gene.


The virologic response to tenofovir disoproxil fumarate tablets therapy has been evaluated with respect to baseline viral genotype (N=222) in treatment-experienced subjects participating in Studies 902 and 907. In these clinical trials, 94% of the participants evaluated had baseline HIV-1 isolates expressing at least one NRTI substitution. Virologic responses for subjects in the genotype substudy were similar to the overall trial results.Several exploratory analyses were conducted to evaluate the effect of specific substitutions and substitutional patterns on virologic outcome. Because of the large number of potential comparisons, statistical testing was not conducted. Varying degrees of cross resistance of tenofovir disoproxil fumarate tablets to pre-existing zidovudine resistance-associated substitutions (M41L, D67N, K70R, L210W, T215Y/F, or K219Q/E/N) were observed and appeared to depend on the type and number of specific substitutions. Tenofovir disoproxil fumarate tablets-treated subjects whose HIV-1 expressed 3 or more zidovudine resistance-associated substitutions that included either the M41L or L210W reverse transcriptase substitution showed reduced responses to tenofovir disoproxil fumarate tablets therapy; however, these responses were still improved compared with placebo. The presence of the D67N, K70R, T215Y/F, or K219Q/E/N substitution did not appear to affect responses to tenofovir disoproxil fumarate tablets therapy. Subjects whose virus expressed an L74V substitution without zidovudine resistance associated substitutions (N=8) had reduced response to tenofovir disoproxil fumarate tablets. Limited data are available for subjects whose virus expressed a Y115F substitution (N=3), Q151M substitution (N=2), or T69 insertion (N=4), all of whom had a reduced response.In the protocol defined analyses, virologic response to tenofovir disoproxil fumarate tablets was not reduced in subjects with HIV-1 that expressed the abacavir/emtricitabine/lamivudine resistance-associated M184V substitution. HIV-1 RNA responses among these subjects were durable through Week 48.

Studies 902 and 907 Phenotypic AnalysesPhenotypic analysis of baseline HIV-1 from treatment-experienced subjects (N=100) demonstrated a correlation between baseline susceptibility to tenofovir disoproxil fumarate tablets and response to tenofovir disoproxil fumarate tablets therapy. Table 16 summarizes the HIV-1 RNA response by baseline tenofovir disoproxil fumarate tablets susceptibility.Table 16 HIV-1 RNA Response at Week 24 by Baseline Tenofovir Disoproxil Fumarate Tablets Susceptibility (Intent-To-Treat)


Tenofovir susceptibility was determined by recombinant phenotypic Antivirogram assay (Virco).Baseline Tenofovir Disoproxil Fumarate Tablets Susceptibility


Fold change in susceptibility from wild-type.Change in HIV-1 RNA


Average HIV-1 RNA change from baseline through Week 24 (DAVG 24) in log 10 copies/mL. (N)


<1-0.74 (35)>1 and ≤3-0.56 (49)>3 and ≤4-0.3 (7)>4-0.12 (9)

Activity against HBV

Antiviral ActivityThe antiviral activity of tenofovir against HBV was assessed in the HepG2 2.2.15 cell line. The EC








50 values for tenofovir ranged from 0.14 to 1.5 µM, with CC








50 (50% cytotoxicity concentration) values greater than 100 µM. In cell culture combination antiviral activity studies of tenofovir with the nucleoside HBV reverse transcriptase inhibitors entecavir, lamivudine, and telbivudine, and with the nucleoside HIV-1 reverse transcriptase inhibitor emtricitabine, no antagonistic activity was observed.

ResistanceCumulative tenofovir disoproxil fumarate tablets genotypic resistance has been evaluated annually for up to 384 weeks in Studies 0102, 0103, 0106, 0108, and 0121 with the paired HBV reverse transcriptase amino acid sequences of the pretreatment and on-treatment isolates from subjects who received at least 24 weeks of tenofovir disoproxil fumarate tablets monotherapy and remained viremic with HBV DNA greater than or equal to 400 copies/mL (69 IU/mL) at the end of each study year (or at discontinuation of tenofovir disoproxil fumarate tablets monotherapy) using an as-treated analysis. In the nucleotide-naïve population from Studies 0102 and 0103, HBeAg-positive subjects had a higher baseline viral load than HBeAg-negative subjects and a significantly higher proportion of the subjects remained viremic at their last time point on tenofovir disoproxil fumarate tablets monotherapy (15% versus 5%, respectively).HBV isolates from these subjects who remained viremic showed treatment-emergent substitutions (Table 17); however, no specific substitutions occurred at a sufficient frequency to be associated with resistance to tenofovir disoproxil fumarate tablets (genotypic and phenotypic analyses).Table 17 Amino Acid Substitutions in Viremic Subjects Across HBV Trials of Tenofovir Disoproxil Fumarate TabletsCompensated Liver DiseaseDecompensated Liver Disease (N=39)


Subjects with decompensated liver disease from Study 0108 (N=39) receiving up to 48 weeks of treatment with tenofovir disoproxil fumarate tablets.Nucleotide-Naïve (N=417)


Nucleotide-naïve subjects from Studies 0102 (N=246) and 0103 (N=171) receiving up to 384 weeks of treatment with tenofovir disoproxil fumarate tablets.HEPSERA-Experienced (N=247)


HEPSERA-experienced subjects from Studies 0102/0103 (N=195) and 0106 (N=52) receiving up to 336 weeks of treatment with tenofovir disoproxil fumarate tablets after switching to tenofovir disoproxil fumarate tablets from HEPSERA. Study 0106, a randomized, double-blind, 168-week Phase 2 trial, has been completed.Lamivudine- Resistant (N=136)


Lamivudine-resistant subjects from Study 0121 (N=136) receiving up to 96 weeks of treatment with tenofovir disoproxil fumarate tablets after switching to tenofovir disoproxil fumarate tablets from lamivudine.Viremic at Last Time Point on Tenofovir Disoproxil Fumarate Tablets38/417 (9%)37/247 (15%)9/136 (7%)7/39 (18%)Treatment-Emergent Amino Acid Substitutions


Denominator includes those subjects who were viremic at last time point on tenofovir disoproxil fumarate tablets monotherapy and had evaluable paired genotypic data.18


Of the 18 subjects with treatment-emergent amino acid substitutions during Studies 0102 and 0103, 5 subjects had substitutions at conserved sites and 13 subjects had substitutions only at polymorphic sites, and 8 subjects had only transient substitutions that were not detected at the last time point on tenofovir disoproxil fumarate tablets./32 (56%)


11


Of the 11 HEPSERA-experienced subjects with treatment-emergent amino acid substitutions, 2 subjects had substitutions at conserved sites and 9 had substitutions only at polymorphic sites./31 (35%)


6


Of the 6 lamivudine-resistant subjects with treatment-emergent substitutions during Study 0121, 3 subjects had substitutions at conserved sites and 3 had substitutions only at polymorphic sites./8 (75%)


3/5 (60%)

Cross Resistance Cross resistance has been observed between HBV nucleoside/nucleotide analogue reverse transcriptase inhibitors.In cell based assays, HBV strains expressing the rtV173L, rtL180M, and rtM204I/V substitutions associated with resistance to lamivudine and telbivudine showed a susceptibility to tenofovir ranging from 0.7- to 3.4-fold that of wild type virus. The rtL180M and rtM204I/V double substitutions conferred 3.4-fold reduced susceptibility to tenofovir.HBV strains expressing the rtL180M, rtT184G, rtS202G/I, rtM204V, and rtM250V substitutions associated with resistance to entecavir showed a susceptibility to tenofovir ranging from 0.6- to 6.9-fold that of wild type virus.HBV strains expressing the adefovir resistance-associated substitutions rtA181V and/or rtN236T showed reductions in susceptibility to tenofovir ranging from 2.9- to 10-fold that of wild type virus. Strains containing the rtA181T substitution showed changes in susceptibility to tenofovir ranging from 0.9- to 1.5-fold that of wild type virus.One hundred fifty-two subjects initiating tenofovir disoproxil fumarate tablets therapy in Studies 0102, 0103, 0106, 0108, and 0121 harbored HBV with known resistance substitutions to HBV nucleos(t)ide analogue reverse transcriptase inhibitors: 14 with adefovir resistance-associated substitutions (rtA181S/T/V and/or rtN236T), 135 with lamivudine resistance-associated substitutions (rtM204I/V), and 3 with both adefovir and lamivudine resistance-associated substitutions. Following up to 384 weeks of tenofovir disoproxil fumarate tablets treatment, 10 of the 14 subjects with adefovir-resistant HBV, 124 of the 135 subjects with lamivudine-resistant HBV, and 2 of the 3 subjects with both adefovir- and lamivudine-resistant HBV achieved and maintained virologic suppression (HBV DNA less than 400 copies/mL [69 IU/mL]). Three of the 5 subjects whose virus harbored both the rtA181T/V and rtN236T substitutions remained viremic.

Study 903Data through 144 weeks are reported for Study 903, a double-blind, active-controlled multicenter trial comparing tenofovir disoproxil fumarate tablets (300 mg once daily) administered in combination with lamivudine and efavirenz versus stavudine (d4T), lamivudine, and efavirenz in 600 antiretroviral-naïve subjects. Subjects had a mean age of 36 years (range 18-64); 74% were male, 64% were Caucasian, and 20% were Black. The mean baseline CD4+cell count was 279 cells/mm


3 (range 3-956) and median baseline plasma HIV-1 RNA was 77,600 copies/mL (range 417-5,130,000). Subjects were stratified by baseline HIV-1 RNA and CD4+ cell count. Forty-three percent of subjects had baseline viral loads >100,000 copies/mL and 39% had CD4+ cell counts <200 cells/mm


3. Treatment outcomes through 48 and 144 weeks are presented in Table 18.


Table 18 Outcomes of Randomized Treatment at Week 48 and 144 (Study 903)At Week 48At Week 144OutcomesTenofovir Disoproxil Fumarate Tablets+3TC


+EFV


(N=299)


d4T+3TC


+EFV


(N=301)


Tenofovir Disoproxil Fumarate Tablets+3TC


+EFV


(N=299)


d4T+3TC


+EFV


(N=301)


Responder


Subjects achieved and maintained confirmed HIV-1 RNA <400 copies/mL through Week 48 and 144.79%82%68%62%Virologic failure


Includes confirmed viral rebound and failure to achieve confirmed <400 copies/mL through Week 48 and 144.6%4%10%8%  Rebound5%3%8%7%  Never suppressed0%1%0%0%  Added an antiretroviral agent1%1%2%1%Death<1%1%<1%2%Discontinued due to adverse event6%6%8%13%Discontinued for other reasons


Includes lost to follow-up, subject's withdrawal, noncompliance, protocol violation and other reasons.8%7%14%15%Achievement of plasma HIV-1 RNA concentrations of less than 400 copies/mL at Week 144 was similar between the two treatment groups for the population stratified at baseline on the basis of HIV-1 RNA concentration (> or ≤100,000 copies/mL) and CD4+cell count (< or ≥200 cells/mm


3). Through 144 weeks of therapy, 62% and 58% of subjects in the tenofovir disoproxil fumarate tablets and stavudine arms, respectively, achieved and maintained confirmed HIV-1 RNA <50 copies/mL. The mean increase from baseline in CD4+ cell count was 263 cells/mm


3 for the tenofovir disoproxil fumarate tablets arm and 283 cells/mm


3 for the stavudine arm.


Through 144 weeks, 11 subjects in the tenofovir disoproxil fumarate tablets group and 9 subjects in the stavudine group experienced a new CDC Class C event.

Study 934Data through 144 weeks are reported for Study 934, a randomized, open-label, active-controlled multicenter trial comparing emtricitabine + tenofovir disoproxil fumarate tablets administered in combination with efavirenz versus zidovudine/lamivudine fixed-dose combination administered in combination with efavirenz in 511 antiretroviral-naïve subjects. From Weeks 96 to 144 of the trial, subjects received a fixed-dose combination of emtricitabine and tenofovir DF with efavirenz in place of emtricitabine + tenofovir disoproxil fumarate tablets with efavirenz. Subjects had a mean age of 38 years (range 18-80); 86% were male, 59% were Caucasian, and 23% were Black. The mean baseline CD4+cell count was 245 cells/mm


3 (range 2-1191) and median baseline plasma HIV-1 RNA was 5.01 log


10 copies/mL (range 3.56-6.54). Subjects were stratified by baseline CD4+cell count (< or ≥200 cells/mm


3); 41% had CD4+cell counts <200 cells/mm


3 and 51% of subjects had baseline viral loads >100,000 copies/mL. Treatment outcomes through 48 and 144 weeks for those subjects who did not have efavirenz resistance at baseline are presented in Table 19.


Table 19 Outcomes of Randomized Treatment at Week 48 and 144 (Study 934)OutcomesAt Week 48At Week 144FTC


+Tenofovir Disoproxil Fumarate Tablets


+EFV


(N=244)


AZT/3TC


+EFV


(N=243)


FTC


+Tenofovir Disoproxil Fumarate Tablets


+EFV


(N=227)


Subjects who were responders at Week 48 or Week 96 (HIV-1 RNA <400 copies/mL) but did not consent to continue the trial after Week 48 or Week 96 were excluded from analysis.AZT/3TC


+EFV


(N=229)


Responder


Subjects achieved and maintained confirmed HIV-1 RNA <400 copies/mL through Weeks 48 and 144.84%73%71%58%Virologic failure


Includes confirmed viral rebound and failure to achieve confirmed <400 copies/mL through Weeks 48 and 144.2%4%3%6%  Rebound1%3%2%5%  Never suppressed0%0%0%0%  Change in antiretroviral regimen1%1%1%1%Death<1%1%1%1%Discontinued due to adverse event4%9%5%12%Discontinued for other reasons


Includes lost to follow-up, subject withdrawal, noncompliance, protocol violation and other reasons.10%14%20%22%Through Week 48, 84% and 73% of subjects in the emtricitabine + tenofovir disoproxil fumarate tablets group and the zidovudine/lamivudine group, respectively, achieved and maintained HIV-1 RNA <400 copies/mL (71% and 58% through Week 144). The difference in the proportion of subjects who achieved and maintained HIV-1 RNA <400 copies/mL through 48 weeks largely results from the higher number of discontinuations due to adverse events and other reasons in the zidovudine/lamivudine group in this open-label trial. In addition, 80% and 70% of subjects in the emtricitabine + tenofovir disoproxil fumarate tablets group and the zidovudine/lamivudine group, respectively, achieved and maintained HIV-1 RNA <50 copies/mL through Week 48 (64% and 56% through Week 144). The mean increase from baseline in CD4+cell count was 190 cells/mm


3 in the EMTRIVA + tenofovir disoproxil fumarate tablets group and 158 cells/mm


3 in the zidovudine/lamivudine group at Week 48 (312 and 271 cells/mm


3 at Week 144).


Through 48 weeks, 7 subjects in the emtricitabine + tenofovir disoproxil fumarate tablets group and 5 subjects in the zidovudine/lamivudine group experienced a new CDC Class C event (10 and 6 subjects through 144 weeks).

Study 907Study 907 was a 24-week, double-blind, placebo-controlled multicenter trial of tenofovir disoproxil fumarate tablets added to a stable background regimen of antiretroviral agents in 550 treatment-experienced subjects. After 24 weeks of blinded trial treatment, all subjects continuing on trial were offered open-label tenofovir disoproxil fumarate tablets for an additional 24 weeks. Subjects had a mean baseline CD4+cell count of 427 cells/mm


3 (range 23-1385), median baseline plasma HIV-1 RNA of 2340 (range 50-75,000) copies/mL, and mean duration of prior HIV-1 treatment was 5.4 years. Mean age of the subjects was 42 years; 85% were male, 69% Caucasian, 17% Black, and 12% Hispanic.


The percent of subjects with HIV-1 RNA <400 copies/mL and outcomes of subjects through 48 weeks are summarized in Table 20.Table 20 Outcomes of Randomized Treatment (Study 907)Outcomes0-24 weeks0-48 weeks24-48 weeksTenofovir Disoproxil Fumarate Tablets


(N=368)


Placebo


(N=182)


Tenofovir Disoproxil Fumarate Tablets


(N=368)


Placebo Crossover


to Tenofovir Disoproxil Fumarate Tablets


(N=170)


HIV-1 RNA <400 copies/mL


Subjects with HIV-1 RNA <400 copies/mL and no prior study drug discontinuation at Week 24 and 48, respectively.40%11%28%30%Virologic failure


Subjects with HIV-1 RNA ≥400 copies/mL efficacy failure or missing HIV-1 RNA at Week 24 and 48 respectively.53%84%61%64%Discontinued due to adverse event3%3%5%5%Discontinued for other reasons


Includes lost to follow-up, subject withdrawal, noncompliance, protocol violation and other reasons.3%3%5%1%At 24 weeks of therapy, there was a higher proportion of subjects in the tenofovir disoproxil fumarate tablets arm compared to the placebo arm with HIV-1 RNA <50 copies/mL (19% and 1%, respectively). Mean change in absolute CD4+cell counts by Week 24 was +11 cells/mm


3 for the tenofovir disoproxil fumarate tablets group and -5 cells/mm


3 for the placebo group. Mean change in absolute CD4+ cell counts by Week 48 was +4 cells/mm


3 for the tenofovir disoproxil fumarate tablets group.


Through Week 24, one subject in the tenofovir disoproxil fumarate tablets group and no subjects in the placebo arm experienced a new CDC Class C event.

Treatment Beyond 48 WeeksIn Studies 0102 (HBeAg-negative) and 0103 (HBeAg-positive), subjects who completed double-blind treatment (389 and 196 subjects who were originally randomized to tenofovir disoproxil fumarate tablets and HEPSERA, respectively) were eligible to roll over to open-label tenofovir disoproxil fumarate tablets with no interruption in treatment.In Study 0102, 266 of 347 subjects who entered the open-label period (77%) continued in the study through Week 384. Among subjects randomized to tenofovir disoproxil fumarate tablets followed by open-label treatment with tenofovir disoproxil fumarate tablets, 73% had HBV DNA <400 copies/ml (69 IU/ml), and 63% had ALT normalization at Week 384. Among subjects randomized to HEPSERA followed by open-label treatment with tenofovir disoproxil fumarate tablets, 80% had HBV DNA <400 copies/mL (69 IU/mL) and 70% had ALT normalization through Week 384. At Week 384, both HBsAg loss and seroconversion were approximately 1% in both treatment groups.In Study 0103, 146 of 238 subjects who entered the open-label period (61%) continued in the study through Week 384. Among subjects randomized to tenofovir disoproxil fumarate tablets, 49% had HBV DNA <400 copies/mL (69 IU/mL), 42% had ALT normalization, and 20% had HBeAg loss (13% seroconversion to anti-HBe antibody) through Week 384. Among subjects randomized to HEPSERA followed by open-label treatment with tenofovir disoproxil fumarate tablets, 56% had HBV DNA <400 copies/mL (69 IU/mL), 50% had ALT normalization, and 28% had HBeAg loss (19% seroconversion to anti-HBe antibody) through Week 384. At Week 384, HBsAg loss and seroconversion were 11% and 8%, respectively, in subjects initially randomized to tenofovir disoproxil fumarate tablets and 12% and 10%, respectively, in subjects initially randomized to HEPSERA.Of the originally randomized and treated 641 subjects in the two studies, liver biopsy data from 328 subjects who received continuing open-label treatment with tenofovir disoproxil fumarate tablets monotherapy were available for analysis at baseline, Week 48, and Week 240. There were no apparent differences between the subset of subjects who had liver biopsy data at Week 240 and those subjects remaining on open-label tenofovir disoproxil fumarate tablets without biopsy data that would be expected to affect histological outcomes at Week 240. Among the 328 subjects evaluated, the observed histological response rates were 80% and 88% at Week 48 and Week 240, respectively. In the subjects without cirrhosis at baseline (Ishak fibrosis score 0-4), 92% (216/235) and 95% (223/235) had either improvement or no change in Ishak fibrosis score at Week 48 and Week 240, respectively. In subjects with cirrhosis at baseline (Ishak fibrosis score 5-6), 97% (90/93) and 99% (92/93) had either improvement or no change in Ishak fibrosis score at Week 48 and Week 240, respectively. Twenty-nine percent (27/93) and 72% (67/93) of subjects with cirrhosis at baseline experienced regression of cirrhosis by Week 48 and Week 240, respectively, with a reduction in Ishak fibrosis score of at least 2 points. No definitive conclusions can be established about the remaining study population who were not part of this subset analysis.

Patients with Lamivudine-Resistant Chronic Hepatitis BStudy 121 was a randomized, double-blind, active-controlled trial evaluating the safety and efficacy of tenofovir disoproxil fumarate tablets compared to an unapproved antiviral regimen in subjects with chronic hepatitis B, persistent viremia (HBV DNA ≥ 1,000 IU/mL), and genotypic evidence of lamivudine resistance (rtM204I/V +/- rtL180M). One hundred forty-one adult subjects were randomized to the tenofovir disoproxil fumarate tablets treatment arm. The mean age of subjects randomized to tenofovir disoproxil fumarate tablets was 47 years (range 18–73); 74% were male, 59% were Caucasian, and 37% were Asian. At baseline, 54% of subjects were HBeAg-negative, 46% were HBeAg-positive, and 56% had abnormal ALT. Subjects had a mean HBV DNA of 6.4 log








10 copies/mL and mean serum ALT of 71 U/L at baseline.








After 96 weeks of treatment, 126 of 141 subjects (89%) randomized to tenofovir disoproxil fumarate tablets had HBV DNA < 400 copies/mL (69 IU/mL), and 49 of 79 subjects (62%) with abnormal ALT at baseline had ALT normalization. Among the HBeAg-positive subjects randomized to tenofovir disoproxil fumarate tablets, 10 of 65 subjects (15%) experienced HBeAg loss and 7 of 65 subjects (11%) experienced anti-HBe seroconversion through Week 96. The proportion of subjects with HBV DNA concentrations below 400 copies/mL (69 IU/mL) at Week 96 was similar between the tenofovir disoproxil fumarate tablets monotherapy and the comparator arms.Across the combined chronic hepatitis B treatment trials, the number of subjects with adefovir-resistance associated substitutions at baseline was too small to establish efficacy in this subgroup.

Tenofovir disoproxil fumarate tablets, 300 mg, are almond-shaped, blue, film-coated tablets containing 300 mg of tenofovir DF, which is equivalent to 245 mg of tenofovir disoproxil, and are debossed with "32" on one side. Each bottle contains 30 tablets and a desiccant (silica gel canister or sachet), and is closed with a child-resistant closure (NDC 69076-105-03).

2.3 Dose Adjustment For Renal Impairment In Adults

Significantly increased drug exposures occurred when tenofovir disoproxil fumarate tablets were administered to subjects with moderate to severe renal impairment


[See


Clinical Pharmacology (12.3)]


. Therefore, the dosing interval of tenofovir disoproxil fumarate tablets 300 mg should be adjusted in patients with baseline creatinine clearance below 50 mL/min using the recommendations in Table 3. These dosing interval recommendations are based on modeling of single-dose pharmacokinetic data in non-HIV and non-HBV infected subjects with varying degrees of renal impairment, including end-stage renal disease requiring hemodialysis. The safety and effectiveness of these dosing interval adjustment recommendations have not been clinically evaluated in patients with moderate or severe renal impairment; therefore, clinical response to treatment and renal function should be closely monitored in these patients


[See


Warnings and Precautions (5.2)]





No dose adjustment of tenofovir disoproxil fumarate tablets 300 mg is necessary for patients with mild renal impairment (creatinine clearance 50-80 mL/min). Routine monitoring of estimated creatinine clearance, serum phosphorus, urine glucose, and urine protein should be performed in patients with mild renal impairment


[See


Warnings and Precautions (5.2)]


.


Table 3 Dosage Adjustment for Patients with Altered Creatinine ClearanceCreatinine Clearance


(mL/min)


Calculated using ideal (lean) body weight.50 or greater30-4910-29Hemodialysis PatientsRecommended 300 mg Dosing IntervalEvery 24 hoursEvery 48 hoursEvery 72 to 96 hoursEvery 7 days or after a total of approximately 12 hours of dialysis


Generally once weekly assuming three hemodialysis sessions a week of approximately 4 hours duration. Tenofovir disoproxil fumarate tablets should be administered following completion of dialysis.The pharmacokinetics of tenofovir have not been evaluated in non-hemodialysis patients with creatinine clearance below 10 mL/min; therefore, no dosing recommendation is available for these patients.No data are available to make dose recommendations in pediatric patients with renal impairment.

3 Dosage Forms And Strengths

Tenofovir disoproxil fumarate is available as tablets.Tenofovir disoproxil fumarate tablets 300 mg contain 300 mg of tenofovir DF, which is equivalent to 245 mg of tenofovir disoproxil. The tablets are almond-shaped, blue, film-coated, and debossed with "32" on one side.

4 Contraindications

None.

5.1 Exacerbation Of Hepatitis After Discontinuation Of Treatment

Discontinuation of anti-HBV therapy, including tenofovir disoproxil fumarate tablets, may be associated with severe acute exacerbations of hepatitis. Patients infected with HBV who discontinue tenofovir disoproxil fumarate tablets should be closely monitored with both clinical and laboratory follow-up for at least several months after stopping treatment. If appropriate, resumption of anti-hepatitis B therapy may be warranted.

5.2 New Onset Or Worsening Renal Impairment

Tenofovir is principally eliminated by the kidney. Renal impairment, including cases of acute renal failure and Fanconi syndrome (renal tubular injury with severe hypophosphatemia), has been reported with the use of tenofovir disoproxil fumarate tablets


[See


Adverse Reactions (6.2)]


.


It is recommended that estimated creatinine clearance be assessed in all patients prior to initiating therapy and as clinically appropriate during therapy with tenofovir disoproxil fumarate tablets. In patients at risk of renal dysfunction, including patients who have previously experienced renal events while receiving HEPSERA


®, it is recommended that estimated creatinine clearance, serum phosphorus, urine glucose, and urine protein be assessed prior to initiation of tenofovir disoproxil fumarate tablets, and periodically during tenofovir disoproxil fumarate tablets therapy.


Dosing interval adjustment of tenofovir disoproxil fumarate tablets and close monitoring of renal function are recommended in all patients with creatinine clearance below 50 mL/min


[See


Dosage and Administration (2.3)]


. No safety or efficacy data are available in patients with renal impairment who received tenofovir disoproxil fumarate tablets using these dosing guidelines, so the potential benefit of tenofovir disoproxil fumarate tablets therapy should be assessed against the potential risk of renal toxicity.


Tenofovir disoproxil fumarate tablets should be avoided with concurrent or recent use of a nephrotoxic agent (e.g., high-dose or multiple non-steroidal anti-inflammatory drugs (NSAIDs))


[See Drug Interactions (7.1)]


. Cases of acute renal failure after initiation of high dose or multiple NSAIDs have been reported in HIV-infected patients with risk factors for renal dysfunction who appeared stable on tenofovir DF. Some patients required hospitalization and renal replacement therapy. Alternatives to NSAIDs should be considered, if needed, in patients at risk for renal dysfunction.


Persistent or worsening bone pain, pain in extremities, fractures and/or muscular pain or weakness may be manifestations of proximal renal tubulopathy and should prompt an evaluation of renal function in at-risk patients.

5.3 Lactic Acidosis/Severe Hepatomegaly With Steatosis

Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported with the use of nucleoside analogs, including Tenofovir DF, alone or in combination with other antiretrovirals. Treatment with tenofovir disoproxil fumarate tablets should be suspended in any patient who develops clinical or laboratory findings suggestive of lactic acidosis or pronounced hepatotoxicity (which may include hepatomegaly and steatosis even in the absence of marked transaminase elevations).

5.4 Coadministration With Other Products

Tenofovir disoproxil fumarate tablets should not be used in combination with other drugs containing tenofovir DF or tenofovir alafenamide, including ATRIPLA, BIKTARVY, COMPLERA, DESCOVY, GENVOYA, ODEFSEY, STRIBILD, TRUVADA, or VEMLIDY. Tenofovir disoproxil fumarate tablets should not be administered in combination with HEPSERA (adefovir dipivoxil)


[See


Drug Interactions (7.2)]


.

5.5 Patients Coinfected With Hiv-1 And Hbv

Due to the risk of development of HIV-1 resistance, tenofovir disoproxil fumarate tablets should only be used in HIV-1 and HBV coinfected patients as part of an appropriate antiretroviral combination regimen.HIV-1 antibody testing should be offered to all HBV-infected patients before initiating therapy with tenofovir disoproxil fumarate tablets. It is also recommended that all patients with HIV-1 be tested for the presence of chronic hepatitis B before initiating treatment with tenofovir disoproxil fumarate tablets.

5.7 Immune Reconstitution Syndrome

Immune reconstitution syndrome has been reported in HIV-infected patients treated with combination antiretroviral therapy, including tenofovir disoproxil fumarate tablets. During the initial phase of combination antiretroviral treatment, patients whose immune system responds may develop an inflammatory response to indolent or residual opportunistic infections (such as








Mycobacterium avium infection, cytomegalovirus,








Pneumocystis jirovecii pneumonia [PCP], or tuberculosis), which may necessitate further evaluation and treatment.








Autoimmune disorders (such as Graves' disease, polymyositis, and Guillain-Barré syndrome) have also been reported to occur in the setting of immune reconstitution; however, the time to onset is more variable, and can occur many months after initiation of treatment.

5.8 Early Virologic Failure

Clinical trials in HIV-infected subjects have demonstrated that certain regimens that only contain three nucleoside reverse transcriptase inhibitors (NRTI) are generally less effective than triple drug regimens containing two NRTIs in combination with either a non-nucleoside reverse transcriptase inhibitor or a HIV-1 protease inhibitor. In particular, early virological failure and high rates of resistance substitutions have been reported. Triple nucleoside regimens should therefore be used with caution. Patients on a therapy utilizing a triple nucleoside-only regimen should be carefully monitored and considered for treatment modification.

6 Adverse Reactions

  • The following adverse reactions are discussed in other sections of the labeling:Severe Acute Exacerbation of Hepatitis
  • [See
  • Boxed Warning,
  • Warnings and Precautions (5.1)]
  • .
  • New Onset or Worsening Renal Impairment
  • [See
  • Warnings and Precautions (5.2)]
  • .
  • Lactic Acidosis/Severe Hepatomegaly with Steatosis
  • [See
  • Warnings and Precautions (5.3)].
  • Bone Effects
  • [See
  • Warnings and Precautions (5.6)]
  • .
  • Immune Reconstitution Syndrome
  • [See
  • Warnings and Precautions (5.7)]
  • .

6.1 Adverse Reactions From Clinical Trials Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.

6.2 Postmarketing Experience

The following adverse reactions have been identified during postapproval use of tenofovir disoproxil fumarate tablets. Because postmarketing reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.Immune System Disordersallergic reaction, including angioedema








Metabolism and Nutrition Disorderslactic acidosis, hypokalemia, hypophosphatemia








Respiratory, Thoracic,








and Mediastinal Disordersdyspnea








Gastrointestinal Disorderspancreatitis, increased amylase, abdominal pain








Hepatobiliary Disordershepatic steatosis, hepatitis, increased liver enzymes (most commonly AST, ALT gamma GT)








Skin and Subcutaneous Tissue Disordersrash








Musculoskeletal and Connective Tissue Disordersrhabdomyolysis, osteomalacia (manifested as bone pain and which may contribute to fractures), muscular weakness, myopathy








Renal and Urinary Disordersacute renal failure, renal failure, acute tubular necrosis, Fanconi syndrome, proximal renal tubulopathy, interstitial nephritis (including acute cases), nephrogenic diabetes insipidus, renal insufficiency, increased creatinine, proteinuria, polyuria








General Disorders and Administration Site Conditionsasthenia








The following adverse reactions, listed under the body system headings above, may occur as a consequence of proximal renal tubulopathy: rhabdomyolysis, osteomalacia, hypokalemia, muscular weakness, myopathy, hypophosphatemia.

7.1 Drugs Affecting Renal Function

Tenofovir is primarily eliminated by the kidneys


[see


Clinical Pharmacology (12.3)].


Coadministration of tenofovir disoproxil fumarate tablets with drugs that are eliminated by active tubular secretion may increase concentrations of tenofovir and/or the coadministered drug. Some examples include, but are not limited to, acyclovir, cidofovir, ganciclovir, valacyclovir, valganciclovir, aminoglycosides (e.g., gentamicin), and high-dose or multiple NSAIDs


[see


Warnings and Precautions (5.2)].


Drugs that decrease renal function may increase concentrations of tenofovir.


In the treatment of chronic hepatitis B, tenofovir disoproxil fumarate tablets should not be administered in combination with HEPSERA (adefovir dipivoxil).

7.2 Established And Significant Interactions

Table 11 provides a listing of established or clinically significant drug interactions. The drug interactions described are based on studies conducted with tenofovir DF


[see


Clinical Pharmacology (12.3)].


Table 11 Established and Significant


This table is not all inclusive. Drug Interactions: Alteration in Dose or Regimen May Be Recommended Based on Drug Interaction Trials


Concomitant Drug Class: Drug NameEffect on Concentration


↑=Increase, ↓=DecreaseClinical CommentNRTI: didanosine


↑ didanosinePatients receiving tenofovir disoproxil fumarate tablets and didanosine should be monitored closely for didanosine-associated adverse reactions. Discontinue didanosine in patients who develop didanosine-associated adverse reactions. Higher didanosine concentrations could potentiate didanosine-associated adverse reactions, including pancreatitis, and neuropathy. Suppression of CD4+ cell counts has been observed in patients receiving tenofovir disoproxil fumarate tablets with didanosine 400 mg daily.In patients weighing greater than 60 kg, reduce the didanosine dose to 250 mg when it is coadministered with tenofovir disoproxil fumarate tablets. In patients weighing less than 60 kg, reduce the didanosine dose to 200 mg when it is coadministered with tenofovir disoproxil fumarate tablets. When coadministered, tenofovir disoproxil fumarate tablets and Videx EC may be taken under fasted conditions or with a light meal (less than 400 kcal, 20% fat). HIV-1 Protease Inhibitors:


atazanavir


↓ atazanavirWhen coadministered with tenofovir disoproxil fumarate tablets, atazanavir 300 mg should be given with ritonavir 100 mg. lopinavir/ritonavir


atazanavir/ritonavir


darunavir/ritonavir


↑ tenofovirMonitor patients receiving tenofovir disoproxil fumarate tablets concomitantly with lopinavir/ritonavir, ritonavir-boosted atazanavir, or ritonavir-boosted darunavir for tenofovir DF-associated adverse reactions. Discontinue tenofovir disoproxil fumarate tablets in patients who develop tenofovir DF-associated adverse reactions.Hepatitis C Antiviral Agents:sofosbuvir/velpatasvir


sofosbuvir/velpatasvir/voxilaprevir


↑ tenofovirMonitor patients receiving tenofovir disoproxil fumarate tablets concomitantly with EPCLUSA


® (sofosbuvir/velpatasvir) or VOSEVI


® (sofosbuvir/velpatasvir/voxilaprevir) for adverse reactions associated with tenofovir DF.


ledipasvir/sofosbuvirMonitor patients receiving tenofovir disoproxil fumarate tablets concomitantly with HARVONI


® (ledipasvir/sofosbuvir) without an HIV-1 protease inhibitor/ritonavir or an HIV-1 protease inhibitor/cobicistat combination for adverse reactions associated with tenofovir DF. In patients receiving tenofovir disoproxil fumarate tablets concomitantly with HARVONI and an HIV-1 protease inhibitor/ritonavir or an HIV-1 protease inhibitor/cobicistat combination, consider an alternative HCV or antiretroviral therapy, as the safety of increased tenofovir concentrations in this setting has not been established. If coadministration is necessary, monitor for adverse reactions associated with tenofovir DF.

Teratogenic Effects

Pregnancy Category BThere are no adequate and well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, tenofovir disoproxil fumarate tablets should be used during pregnancy only if clearly needed.

Animal Data

Reproduction studies have been performed in rats and rabbits at doses up to 14 and 19 times the human dose based on body surface area comparisons and revealed no evidence of impaired fertility or harm to the fetus due to tenofovir.

8.3 Nursing Mothers

Nursing Mothers: The Centers for Disease Control and Prevention recommend that HIV-1-infected mothers not breastfeed their infants to avoid risking postnatal transmission of HIV-1.Samples of breast milk obtained from five HIV-1 infected mothers in the first post-partum week show that tenofovir is secreted in human milk. The impact of this exposure in breastfed infants is unknown. Because of both the potential for HIV-1 transmission and the potential for serious adverse reactions in nursing infants, mothers should be instructed not to breastfeed if they are receiving tenofovir disoproxil fumarate tablets.

8.5 Geriatric Use

Clinical trials of tenofovir disoproxil fumarate tablets did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. In general, dose selection for the elderly patient should be cautious, keeping in mind the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

8.6 Patients With Impaired Renal Function

It is recommended that the dosing interval for tenofovir disoproxil fumarate tablets be modified in patients with estimated creatinine clearance below 50 mL/min or in patients with ESRD who require dialysis








[See








Dosage and Administration (2.3),








Clinical Pharmacology (12.3)]








.

10 Overdosage

Limited clinical experience at doses higher than the therapeutic dose of tenofovir disoproxil fumarate tablets 300 mg is available. In Study 901, 600 mg tenofovir DF was administered to 8 subjects orally for 28 days. No severe adverse reactions were reported. The effects of higher doses are not known.If overdose occurs the patient must be monitored for evidence of toxicity, and standard supportive treatment applied as necessary.Tenofovir is efficiently removed by hemodialysis with an extraction coefficient of approximately 54%. Following a single 300 mg dose of tenofovir disoproxil fumarate tablets, a four-hour hemodialysis session removed approximately 10% of the administered tenofovir dose.

11 Description

Tenofovir DF (a prodrug of tenofovir) is a fumaric acid salt of bis-isopropoxycarbonyloxymethyl ester derivative of tenofovir. In vivo tenofovir DF is converted to tenofovir, an acyclic nucleoside phosphonate (nucleotide) analog of adenosine 5'-monophosphate. Tenofovir exhibits activity against HIV-1 reverse transcriptase.The chemical name of tenofovir disoproxil fumarate is 9-[(


R)-2-[[bis[[(isopropoxycarbonyl)oxy]methoxy]phosphinyl]methoxy]propyl]adenine fumarate (1:1). It has a molecular formula of C


19H


30N


5O


10P • C


4H


4O


4 and a molecular weight of 635.52. It has the following structural formula:


Tenofovir DF is a white to off-white crystalline powder with a solubility of 13.4 mg/mL in distilled water at 25 °C. It has an octanol/phosphate buffer (pH 6.5) partition coefficient (log p) of 1.25 at 25 °C.Tenofovir disoproxil fumarate tablets is available as tablets.Tenofovir disoproxil fumarate tablets are for oral administration in strength of 300 mg of tenofovir DF, which is equivalent to 245 mg of tenofovir disoproxil. Each tablet contains the following inactive ingredients: croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and pregelatinized starch. The 300 mg tablets are coated with Opadry II 32K605004, which contains FD&C blue #2 aluminum lake, hypromellose 2910, lactose monohydrate, titanium dioxide, and triacetin. In this insert, dosages are expressed in terms of tenofovir DF except where otherwise noted.

12.1 Mechanism Of Action

Tenofovir DF is an antiviral drug








[See








Microbiology (12.4)].

12.3 Pharmacokinetics

The pharmacokinetics of tenofovir DF have been evaluated in healthy volunteers and HIV-1 infected individuals. Tenofovir pharmacokinetics are similar between these populations.

Carcinogenesis

Long-term oral carcinogenicity studies of tenofovir DF in mice and rats were carried out at exposures up to approximately 16 times (mice) and 5 times (rats) those observed in humans at the therapeutic dose for HIV-1 infection. At the high dose in female mice, liver adenomas were increased at exposures 16 times that in humans. In rats, the study was negative for carcinogenic findings at exposures up to 5 times that observed in humans at the therapeutic dose.

Mutagenesis

Tenofovir DF was mutagenic in the in vitro mouse lymphoma assay and negative in an in vitro bacterial mutagenicity test (Ames test). In an in vivo mouse micronucleus assay, tenofovir DF was negative when administered to male mice.

Impairment Of Fertility

There were no effects on fertility, mating performance or early embryonic development when tenofovir DF was administered to male rats at a dose equivalent to 10 times the human dose based on body surface area comparisons for 28 days prior to mating and to female rats for 15 days prior to mating through day seven of gestation. There was, however, an alteration of the estrous cycle in female rats.

13.2 Animal Toxicology And/Or Pharmacology

Tenofovir and tenofovir disoproxil fumarate administered in toxicology studies to rats, dogs, and monkeys at exposures (based on AUCs) greater than or equal to 6 fold those observed in humans caused bone toxicity. In monkeys the bone toxicity was diagnosed as osteomalacia. Osteomalacia observed in monkeys appeared to be reversible upon dose reduction or discontinuation of tenofovir. In rats and dogs, the bone toxicity manifested as reduced bone mineral density. The mechanism(s) underlying bone toxicity is unknown. Evidence of renal toxicity was noted in 4 animal species. Increases in serum creatinine, BUN, glycosuria, proteinuria, phosphaturia, and/or calciuria and decreases in serum phosphate were observed to varying degrees in these animals. These toxicities were noted at exposures (based on AUCs) 2–20 times higher than those observed in humans. The relationship of the renal abnormalities, particularly the phosphaturia, to the bone toxicity is not known.

Storage And Handling

Store tenofovir disoproxil fumarate tablets at 25 °C (77 °F), excursions permitted to 15°C to 30°C (59°F to 86°F) (see


USP Controlled Room Temperature).


Keep the bottle tightly closed. Do not use if seal over bottle opening is broken or missing.

17 Patient Counseling Information

  • Advise the patient to read the FDA-approved patient labeling (Patient Information).Inform patients that tenofovir disoproxil fumarate tablets are not a cure for HIV-1 infection and patients may continue to experience illnesses associated with HIV-1 infection, including opportunistic infections. Patients should remain under the care of a physician when using tenofovir disoproxil fumarate tablets.Advise patients to avoid doing things that can spread HIV or HBV to others.
  • Do not share needles or other injection equipment.Do not share personal items that can have blood or body fluids on them, like toothbrushes and razor blades.Do not have any kind of sex without protection. Always practice safer sex by using a latex or polyurethane condom to lower the chance of sexual contact with semen, vaginal secretions, or blood.
  • Do not breastfeed. Tenofovir is excreted in breast milk and it is not known whether it can harm the baby. Mothers with HIV-1 should not breastfeed because HIV-1 can be passed to the baby in the breast milk.
  • Inform patients that:The long-term effects of tenofovir disoproxil fumarate tablets are unknown.Tenofovir disoproxil fumarate tablets are for oral ingestion only.Tenofovir disoproxil fumarate tablets should not be discontinued without first informing their physician.If you have HIV-1 infection, with or without HBV coinfection, it is important to take tenofovir disoproxil fumarate tablets with combination therapy.It is important to take tenofovir disoproxil fumarate tablets on a regular dosing schedule and to avoid missing doses.Severe acute exacerbations of hepatitis have been reported in patients who are infected with HBV or coinfected with HBV and HIV-1 and have discontinued tenofovir disoproxil fumarate tablets
  • [See
  • Warnings and Precautions (5.1)]
  • .
  • Renal impairment, including cases of acute renal failure and Fanconi syndrome, has been reported. Tenofovir disoproxil fumarate tablets should be avoided with concurrent or recent use of a nephrotoxic agent (e.g., high-dose or multiple NSAIDs)
  • [See
  • Warnings and Precautions (5.2)]
  • .
  • Lactic acidosis and severe hepatomegaly with steatosis, including fatal cases, have been reported. Treatment with tenofovir disoproxil fumarate tablets should be suspended in any patient who develops clinical symptoms suggestive of lactic acidosis or pronounced hepatotoxicity
  • [See
  • Warnings and Precautions (5.3)]
  • .
  • Tenofovir disoproxil fumarate tablets should not be coadministered with ATRIPLA, BIKTARVY, COMPLERA, DESCOVY, GENVOYA, ODEFSEY, STRIBILD, TRUVADA, or VEMLIDY
  • [See
  • Warnings and Precautions (5.4)]
  • .
  • Tenofovir disoproxil fumarate tablets should not be administered in combination with HEPSERA
  • [See
  • Warnings and Precautions (5.4)]
  • .
  • Decreases in bone mineral density have been observed with the use of tenofovir disoproxil fumarate tablets. Bone mineral density monitoring should be considered in patients who have a history of pathologic bone fracture or at risk for osteopenia
  • [See
  • Warnings and Precautions (5.6)]
  • .
  • In some patients treated with combination antiretroviral therapy, including tenofovir disoproxil fumarate tablets, signs and symptoms of inflammation from previous infections may occur soon after anti-HIV treatment is started. It is believed that these symptoms are due to an improvement in the body’s immune response, enabling the body to fight infections that may have been present with no obvious symptoms. Advise patients to inform their healthcare provider immediately of any symptoms of infection
  • [See
  • Warnings and Precautions (5.7) ]
  • .
  • In the treatment of chronic hepatitis B, the optimal duration of treatment is unknown. The relationship between response and long-term prevention of outcomes such as hepatocellular carcinoma is not known.Manufactured by:Qilu Pharmaceutical Co., Ltd.Jinan, 250101, ChinaManufactured for:Quinn Pharmaceuticals, LLCBoca Raton, FL, USA Code number: 34040051111DRevised: September 2018All brand names listed are the registered trademarks of their respective owners and are not trademarks of Qilu Pharmaceutical Co., Ltd..

Spl Patient Package Insert

  • Patient Information
  • Tenofovir Disoproxil Fumarate
  • (ten-OF-oh-vir dye-soe-PROX-il FUE-ma-rate)
  • Tablets
  • This Patient Information has been approved by the U.S. Food and Drug Administration.Revised: September 2018Read this Patient Information before you start taking tenofovir disoproxil fumarate tablets and each time you get a refill. There may be new information. This information does not take the place of talking with your healthcare provider about your medical condition or treatment.What is the most important information I should know about tenofovir disoproxil fumarate tablets? tenofovir disoproxil fumarate tablets can cause serious side effects, including:Worsening of your Hepatitis B infection. Your hepatitis B virus (HBV) infection may become worse (flare-up) if you take tenofovir disoproxil fumarate tablets and then stop it. A "flare-up" is when your HBV infection suddenly returns in a worse way than before.
  • Do not let your tenofovir disoproxil fumarate tablets run out. Refill your prescription or talk to your healthcare provider before your tenofovir disoproxil fumarate tablets are all gone.
  • Do not stop taking tenofovir disoproxil fumarate tablets without first talking to your healthcare provider.
  • If you stop taking tenofovir disoproxil fumarate tablets, your healthcare provider will need to check your health often and do blood tests regularly to check your HBV infection. Tell your healthcare provider about any new or unusual symptoms you may have after you stop taking tenofovir disoproxil fumarate tablets.Talk to your doctor about taking an HIV test before starting treatment with tenofovir disoproxil fumarate tablets for chronic hepatitis B. You should also get a test for HBV if you are taking tenofovir disoproxil fumarate tablets for treatment of HIV.What are tenofovir disoproxil fumarate tablets?tenofovir disoproxil fumarate tablets are a prescription medicine used:with other antiviral medicines to treat Human Immunodeficiency Virus-1 (HIV-1) in people 2 years of age and older.
  • When used with other HIV medicines, tenofovir disoproxil fumarate tablets may reduce the amount of HIV in your blood (called "viral load"). tenofovir disoproxil fumarate tablets may also help to increase the number of CD4 (T) cells in your blood which help fight off other infections. Reducing the amount of HIV and increasing the CD4 (T) cell count may improve your immune system. This may reduce your risk of death or infections that can happen when your immune system is weak (opportunistic infections).Tenofovir disoproxil fumarate tablets do not cure HIV infection or AIDS. People taking tenofovir disoproxil fumarate tablets may still develop infections or other conditions associated with HIV infection.
  • You must stay on continuous HIV therapy to control infection and decrease HIV-related illnesses.It is very important that you stay under the care of your healthcare provider.HIV is the virus that causes AIDS (Acquired Immune Deficiency Syndrome).It is not known if tenofovir disoproxil fumarate tablets are safe and effective for the treatment of HIV-1 infection in children under the age of 2 years.to treat chronic (long-lasting) hepatitis B virus (HBV) in people 12 years of age and older.
  • Tenofovir disoproxil fumarate tablets may lower the amount of HBV in your body.Tenofovir disoproxil fumarate tablets may improve the condition of your liver.It is not known if tenofovir disoproxil fumarate tablets are safe and effective for treatment of chronic hepatitis B in children under the age of 12 years.What should I tell my healthcare provider before taking tenofovir disoproxil fumarate tablets?Before you take tenofovir disoproxil fumarate tablets, tell your healthcare provider if you:have liver problems, including hepatitis B (HBV) infection.have kidney problems.have bone problems.have any other medical conditions, including HIV infection.are pregnant or plan to become pregnant. It is not known if tenofovir disoproxil fumarate tablets will harm your unborn baby.
  • Pregnancy Registry. There is a pregnancy registry for women who take antiviral medicines during pregnancy. Its purpose is to collect information about the health of you and your baby. Talk to your healthcare provider about how you can take part in this registry.
  • Are breastfeeding or plan to breastfeed.
  • Do not breastfeed if you are taking tenofovir disoproxil fumarate tablets. Tenofovir passes into your breast milk. You should not breastfeed because of the risk of passing HIV to your baby. Talk to your healthcare provider about the best way to feed your baby.
  • Tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements.
  • Some medicines may affect how tenofovir disoproxil fumarate tablets work.Keep a list of your medicines and show it to your healthcare provider and pharmacist when you get a new medicine. You can ask your healthcare provider or pharmacist for a list of medicines that interact with tenofovir disoproxil fumarate tablets.Do not start a new medicine without telling your healthcare provider. Your healthcare provider can tell you if it is safe to take tenofovir disoproxil fumarate tablets with other medicines.
  • How should I take tenofovir disoproxil fumarate tablets?See "
  • What is the most important information I should know about tenofovir disoproxil fumarate tablets?"
  • Take tenofovir disoproxil fumarate tablets exactly as your healthcare provider tells you to take it.Take tenofovir disoproxil fumarate tablets at the same time every day.For adults and children 12 years of age and older, the usual dose of tenofovir disoproxil fumarate tablets is one 300 mg tablet each day.If you are an adult with kidney problems, your healthcare provider may tell you to take tenofovir disoproxil fumarate tablets less often.For children 2 to 12 years of age, your healthcare provider will prescribe the right dose of tenofovir disoproxil fumarate tablets oral powder or tablets based on your child's body weight.Tell your healthcare provider if your child has problems with swallowing tablets.Take tenofovir disoproxil fumarate tablets tablets by mouth, with or without food.Do not miss a dose of tenofovir disoproxil fumarate tablets. If you miss a dose of tenofovir disoproxil fumarate tablets, take the missed dose as soon as you remember. If it is almost time for your next dose of tenofovir disoproxil fumarate tablets, do not take the missed dose. Take the next dose of tenofovir disoproxil fumarate tablets at your regular time.If you take too much tenofovir disoproxil fumarate tablets, call your local poison control center or go right away to the nearest hospital emergency room.What are the possible side effects of tenofovir disoproxil fumarate tablets? tenofovir disoproxil fumarate tablets may cause serious side effects, including:See "
  • What is the most important information I should know about tenofovir disoproxil fumarate tablets?"
  • New or worse kidney problems, including kidney failure, can happen in some people who take tenofovir disoproxil fumarate tablets. Your healthcare provider should do blood tests to check your kidneys before you start treatment with tenofovir disoproxil fumarate tablets. If you have had kidney problems in the past or need to take another medicine that can cause kidney problems, your healthcare provider may need to do blood tests to check your kidneys during your treatment with tenofovir disoproxil fumarate tablets.
  • Too much lactic acid in your blood (lactic acidosis). Too much lactic acid is a serious but rare medical emergency that can lead to death. Tell your healthcare provider right away if you get these symptoms: weakness or being more tired than usual, unusual muscle pain, being short of breath or fast breathing, stomach pain with nausea and vomiting, cold or blue hands and feet, feel dizzy or lightheaded, or a fast or abnormal heartbeat.
  • Severe liver problems. In rare cases, severe liver problems can happen that can lead to death. Tell your healthcare provider right away if you get these symptoms: skin or the white part of your eyes turns yellow, dark "tea-colored" urine, light-colored stools, loss of appetite for several days or longer, nausea, or stomach-area pain.
  • Bone problems can happen in some people who take tenofovir disoproxil fumarate tablets. Bone problems include bone pain, softening or thinning (which may lead to fractures). Your healthcare provider may need to do additional tests to check your bones.
  • Changes in your immune system (Immune Reconstitution Syndrome) can happen when you start taking HIV medicines. Your immune system may get stronger and begin to fight infections that have been hidden in your body for a long time. Tell your healthcare provider if you start having new symptoms after starting your HIV medicine.
  • The most common side effects in all people who take tenofovir disoproxil fumarate tablets are:nausearashdiarrheaheadachepaindepressionweaknessIn some people with advanced HBV-infection, other common side effects may include:sleeping problemsitchingvomitingdizzinessfeverTell your healthcare provider if you have any side effect that bothers you or that does not go away.These are not all the possible side effects of tenofovir disoproxil fumarate tablets. For more information, ask your healthcare provider or pharmacist.Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.How should I store tenofovir disoproxil fumarate tablets?Store tenofovir disoproxil fumarate tablets tablets at room temperature between 68 °F to 77 °F (20 °C to 25 °C).Keep tenofovir disoproxil fumarate tablets in the original container.Do not use tenofovir disoproxil fumarate tablets if the seal over the bottle opening is broken or missing.Keep the bottle tightly closed.Keep tenofovir disoproxil fumarate tablets and all medicines out of the reach of children. General information about tenofovir disoproxil fumarate tablets:Medicines are sometimes prescribed for purposes other than those listed in a Patient Information leaflet. Do not use tenofovir disoproxil fumarate tablets for a condition for which it was not prescribed. Do not give tenofovir disoproxil fumarate tablets to other people, even if they have the same condition you have. It may harm them.Avoid doing things that can spread HIV-1 or HBV infection to others.Do not share or re-use needles or other injection equipment.Do not share personal items that can have blood or body fluids on them, like toothbrushes and razor blades.Do not have any kind of sex without protection. Always practice safe sex by using a latex or polyurethane condom to lower the chance of sexual contact with semen, vaginal secretions, or blood.
  • A vaccine is available to protect people at risk for becoming infected with HBV. You can ask your healthcare provider for information about this vaccine.This leaflet summarizes the most important information about tenofovir disoproxil fumarate tablets. If you would like more information, talk with your healthcare provider. You can ask your pharmacist or healthcare provider for information about tenofovir disoproxil fumarate tablets that is written for health professionals.For more information, call Quinn Pharmaceuticals, LLC at 844-477-8466.What are the ingredients in tenofovir disoproxil fumarate tablets?Active Ingredient: tenofovir disoproxil fumarate
  • Inactive Ingredients: Croscarmellose sodium, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and pregelatinized starch.Tablet Coating: 300 mg: Opadry II 32K605004, which contains FD&C blue #2 aluminum lake, hypromellose 2910, lactose monohydrate, titanium dioxide, and triacetin.Manufactured by:Qilu Pharmaceutical Co., Ltd.Jinan, 250101, ChinaManufactured for:Quinn Pharmaceuticals, LLCBoca Raton, FL, USARevised: September 2018All brand names listed are the registered trademarks of their respective owners and are not trademarks of Qilu Pharmaceutical Co., Ltd..

* Please review the disclaimer below.