Tivorbex
FDA Label NDC 42211-202

Cardiovascular Thrombotic Events 

• Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use [see Warnings and Precautions (5.1)].
  
• TIVORBEX is contraindicated in the setting of coronary artery bypass graft (CABG) surgery [see Contraindications (4) and Warnings and Precautions (5.1)].

Gastrointestinal Bleeding, Ulceration, and Perforation

• NSAIDs cause an increased risk of serious gastrointestinal (GI) adverse events including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms. Elderly patients and patients with a prior history of peptic ulcer disease and/or GI bleeding are at greater risk for serious GI events [see Warnings and Precautions (5.2)].

TIVORBEX is indicated for treatment of mild to moderate acute pain in adults.

Carefully consider the potential benefits and risks of TIVORBEX and other treatment options before deciding to use TIVORBEX. Use the lowest effective dosage for the shortest duration consistent with individual patient treatment goals [see Warnings and Precautions (5)].

For treatment of mild to moderate acute pain, the dosage is 20 mg three times daily or 40 mg two or three times daily. 

Different dose strengths and formulations of oral indomethacin are not interchangeable. This difference should be taken into consideration when changing strengths or formulations. 

TIVORBEX (indomethacin) Capsules 20 mg – dark blue body and light blue cap (imprinted IP-201 on the body and 20 mg on the cap in white ink).

TIVORBEX (indomethacin) Capsules 40 mg – dark blue body and blue cap (imprinted IP-202 on the body and 40 mg on the cap in white ink).

TIVORBEX is contraindicated in the following patients: 

• Known hypersensitivity (e.g., anaphylactic reactions and serious skin reactions) to indomethacin or any components of the drug product [see Warnings and Precautions (5.7, 5.9)]
  
• History of asthma, urticaria, or other allergic-type reactions after taking aspirin or other NSAIDs. Severe, sometimes fatal, anaphylactic reactions to NSAIDs have been reported in such patients [see Warnings and Precautions (5.7, 5.8)] 
  
• In the setting of coronary artery bypass graft (CABG) surgery [see Warnings and Precautions (5.1)]

Clinical trials of several COX-2 selective and nonselective NSAIDs of up to three years duration have shown an increased risk of serious cardiovascular (CV) thrombotic events, including myocardial infarction (MI) and stroke, which can be fatal. Based on available data, it is unclear that the risk for CV thrombotic events is similar for all NSAIDs. The relative increase in serious CV thrombotic events over baseline conferred by NSAID use appears to be similar in those with and without known CV disease or risk factors for CV disease. However, patients with known CV disease or risk factors had a higher absolute incidence of excess serious CV thrombotic events, due to their increased baseline rate. Some observational studies found that this increased risk of serious CV thrombotic events began as early as the first weeks of treatment. The increase in CV thrombotic risk has been observed most consistently at higher doses.

To minimize the potential risk for an adverse CV event in NSAID-treated patients, use the lowest effective dose for the shortest duration possible. Physicians and patients should remain alert for the development of such events, throughout the entire treatment course, even in the absence of previous CV symptoms. Patients should be informed about the symptoms of serious CV events and the steps to take if they occur.

There is no consistent evidence that concurrent use of aspirin mitigates the increased risk of serious CV thrombotic events associated with NSAID use. The concurrent use of aspirin and an NSAID, such as indomethacin, increases the risk of serious gastrointestinal (GI) events [see Warnings and Precautions (5.2)]. 

Status Post Coronary Artery Bypass Graft (CABG) Surgery 

Two large, controlled clinical trials of a COX-2 selective NSAID for the treatment of pain in the first 10–14 days following CABG surgery found an increased incidence of myocardial infarction and stroke. NSAIDs are contraindicated in the setting of CABG [see Contraindications (4)].

Post-MI Patients

Observational studies conducted in the Danish National Registry have demonstrated that patients treated with NSAIDs in the post-MI period were at increased risk of reinfarction, CV-related death, and all-cause mortality beginning in the first week of treatment. In this same cohort, the incidence of death in the first year post-MI was 20 per 100 person years in NSAID-treated patients compared to 12 per 100 person years in non-NSAID exposed patients. Although the absolute rate of death declined somewhat after the first year post-MI, the increased relative risk of death in NSAID users persisted over at least the next four years of follow-up.

Avoid the use of TIVORBEX in patients with a recent MI unless the benefits are expected to outweigh the risk of recurrent CV thrombotic events. If TIVORBEX is used in patients with a recent MI, monitor patients for signs of cardiac ischemia.

NSAIDs, including indomethacin, cause serious gastrointestinal (GI) adverse events including inflammation, bleeding, ulceration, and perforation of the esophagus, stomach, small intestine, or large intestine, which can be fatal. These serious adverse events can occur at any time, with or without warning symptoms, in patients treated with NSAIDs. Only one in five patients who develop a serious upper GI adverse event on NSAID therapy is symptomatic. Upper GI ulcers, gross bleeding, or perforation caused by NSAIDs occurred in approximately 1% of patients treated for 3-6 months, and in about 2%-4% of patients treated for one year. However, even short-term NSAID therapy is not without risk.

Risk Factors for GI Bleeding, Ulceration, and Perforation

Patients with a prior history of peptic ulcer disease and/or GI bleeding who used NSAIDs had a greater than 10-fold increased risk for developing a GI bleed compared to patients without these risk factors. Other factors that increase the risk of GI bleeding in patients treated with NSAIDs include longer duration of NSAID therapy; concomitant use of oral corticosteroids, aspirin, anticoagulants, or selective serotonin reuptake inhibitors (SSRIs); smoking; use of alcohol; older age; and poor general health status. Most postmarketing reports of fatal GI events occurred in elderly or debilitated patients. Additionally, patients with advanced liver disease and/or coagulopathy are at increased risk for GI bleeding.

Strategies to Minimize the GI Risks in NSAID-treated patients:

• Use the lowest effective dosage for the shortest possible duration. 
  
• Avoid administration of more than one NSAID at a time.  
  
• Avoid use in patients at higher risk unless benefits are expected to outweigh the increased risk of bleeding. For such patients, as well as those with active GI bleeding, consider alternate therapies other than NSAIDs. 
  
• Remain alert for signs and symptoms of GI ulceration and bleeding during NSAID therapy.
  
• If a serious GI adverse event is suspected, promptly initiate evaluation and treatment, and discontinue TIVORBEX until a serious GI adverse event is ruled out.
  
• In the setting of concomitant use of low-dose aspirin for cardiac prophylaxis, monitor patients more closely for evidence of GI bleeding [see Drug Interactions (7)].

Elevations of ALT or AST (three or more times the upper limit of normal [ULN]) have been reported in approximately 1% of NSAID-treated patients in clinical trials. In addition, rare, sometimes fatal, cases of severe hepatic injury, including fulminant hepatitis, liver necrosis, and hepatic failure have been reported.

Elevations of ALT or AST (less than three times ULN) may occur in up to 15% of patients treated with NSAIDs including indomethacin. 

Inform patients of the warning signs and symptoms of hepatotoxicity (e.g., nausea, fatigue, lethargy, diarrhea, pruritus, jaundice, right upper quadrant tenderness, and "flu-like" symptoms). If clinical signs and symptoms consistent with liver disease develop, or if systemic manifestations occur (e.g., eosinophilia, rash, etc.), discontinue TIVORBEX immediately, and perform a clinical evaluation of the patient. 

NSAIDs, including TIVORBEX, can lead to new onset of hypertension or worsening of preexisting hypertension, either of which may contribute to the increased incidence of CV events. Patients taking angiotensin converting enzyme (ACE) inhibitors, thiazide diuretics, or loop diuretics may have impaired response to these therapies when taking NSAIDs [see Drug Interactions (7)].

Monitor blood pressure (BP) during the initiation of NSAID treatment and throughout the course of therapy.

The Coxib and traditional NSAID Trialists’ Collaboration meta-analysis of randomized controlled trials demonstrated an approximately two-fold increase in hospitalizations for heart failure in COX-2 selective-treated patients and nonselective NSAID-treated patients compared to placebo-treated patients. In a Danish National Registry study of patients with heart failure, NSAID use increased the risk of MI, hospitalization for heart failure, and death.

Additionally, fluid retention and edema have been observed in some patients treated with NSAIDs.  Use of indomethacin may blunt the CV effects of several therapeutic agents used to treat these medical conditions (e.g., diuretics, ACE inhibitors, or angiotensin receptor blockers [ARBs]) [see Drug Interactions (7)].

Avoid the use of TIVORBEX in patients with severe heart failure unless the benefits are expected to outweigh the risk of worsening heart failure. If TIVORBEX is used in patients with severe heart failure, monitor patients for signs of worsening heart failure.

Renal Toxicity

Long-term administration of NSAIDs has resulted in renal papillary necrosis and other renal injury.

Renal toxicity has also been seen in patients in whom renal prostaglandins have a compensatory role in the maintenance of renal perfusion. In these patients, administration of an NSAID may cause a dose-dependent reduction in prostaglandin formation and, secondarily, in renal blood flow, which may precipitate overt renal decompensation. Patients at greatest risk of this reaction are those with impaired renal function, dehydration, hypovolemia, heart failure, liver dysfunction, those taking diuretics and ACE inhibitors or ARBs, and the elderly. Discontinuation of NSAID therapy is usually followed by recovery to the pretreatment state.  

No information is available from controlled clinical studies regarding the use of TIVORBEX in patients with advanced renal disease. The renal effects of TIVORBEX may hasten the progression of renal dysfunction in patients with preexisting renal disease.

Correct volume status in dehydrated or hypovolemic patients prior to initiating TIVORBEX.  Monitor renal function in patients with renal or hepatic impairment, heart failure, dehydration, or hypovolemia during use of TIVORBEX [see Drug Interactions (7)]. Avoid the use of TIVORBEX in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function. If TIVORBEX is used in patients with advanced renal disease, monitor patients for signs of worsening renal function.

It has been reported that the addition of the potassium-sparing diuretic, triamterene, to a maintenance schedule of  indomethacin resulted in reversible acute renal failure in two of four healthy volunteers. Indomethacin and triamterene should not be administered together.

Hyperkalemia

Increases in serum potassium concentration, including hyperkalemia, have been reported with use of NSAIDs, even in some patients without renal impairment. In patients with normal renal function, these effects have been attributed to a hyporeninemic-hypoaldosteronism state. 

Both indomethacin and potassium-sparing diuretics may be associated with increased serum potassium levels. The potential effects of indomethacin and potassium-sparing diuretics on potassium levels and renal function should be considered when these agents are administered concurrently.

Indomethacin has been associated with anaphylactic reactions in patients with and without known hypersensitivity to indomethacin and in patients with aspirin-sensitive asthma [see Contraindications (4) and Warnings and Precautions (5.8)].   

Seek emergency help if an anaphylactic reaction occurs.

A subpopulation of patients with asthma may have aspirin-sensitive asthma which may include chronic rhinosinusitis complicated by nasal polyps; severe, potentially fatal bronchospasm; and/or intolerance to aspirin and other NSAIDs. Because cross-reactivity between aspirin and other NSAIDs has been reported in such aspirin-sensitive patients, TIVORBEX is contraindicated in patients with this form of aspirin sensitivity [see Contraindications (4)]. When TIVORBEX is used in patients with preexisting asthma (without known aspirin sensitivity), monitor patients for changes in the signs and symptoms of asthma.

NSAIDs, including indomethacin, can cause serious skin adverse reactions such as exfoliative dermatitis, Stevens-Johnson Syndrome (SJS), and toxic epidermal necrolysis (TEN), which can be fatal. These serious events may occur without warning. Inform patients about the signs and symptoms of serious skin reactions, and to discontinue the use of TIVORBEX at the first appearance of skin rash or any other sign of hypersensitivity. TIVORBEX is contraindicated in patients with previous serious skin reactions to NSAIDs [see Contraindications (4)].

Indomethacin may cause premature closure of the fetal ductus arteriosus. Avoid use of NSAIDs, including TIVORBEX, in pregnant women starting at 30 weeks of gestation (third trimester) [see Use in Specific Populations (8.1)].

Anemia has occurred in NSAID-treated patients. This may be due to occult or gross blood loss, fluid retention, or an incompletely described effect on erythropoiesis. If a patient treated with TIVORBEX has any signs or symptoms of anemia, monitor hemoglobin or hematocrit.

NSAIDs, including TIVORBEX, may increase the risk of bleeding events. Co-morbid conditions, such as coagulation disorders, or concomitant use of warfarin, other anticoagulants, antiplatelet agents (e.g., aspirin), serotonin reuptake inhibitors (SSRIs) and serotonin norepinephrine reuptake inhibitors (SNRIs) may increase this risk. Monitor these patients for signs of bleeding [see Drug Interactions (7)].

The pharmacological activity of TIVORBEX in reducing inflammation, and possibly fever, may diminish the utility of diagnostic signs in detecting infections.  

Because serious GI bleeding, hepatotoxicity, and renal injury can occur without warning symptoms or signs, consider monitoring patients on long-term NSAID treatment with a CBC and a chemistry profile periodically [see Warnings and Precautions (5.2, 5.3, 5.6)].  

TIVORBEX may aggravate depression or other psychiatric disturbances, epilepsy, and parkinsonism, and should be used with considerable caution in patients with these conditions.  Discontinue TIVORBEX if severe CNS adverse reactions develop.

TIVORBEX may cause drowsiness; therefore, caution patients about engaging in activities requiring mental alertness and motor coordination, such as driving a car.  Indomethacin may also cause headache.  Headache which persists despite dosage reduction requires cessation of therapy with TIVORBEX.

Corneal deposits and retinal disturbances, including those of the macula, have been observed in some patients who had received prolonged therapy with TIVORBEX.  Be alert to the possible association between the changes noted and TIVORBEX.  It is advisable to discontinue therapy if such changes are observed.  Blurred vision may be a significant symptom and warrants a thorough ophthalmological examination.  Since these changes may be asymptomatic, ophthalmologic examination at periodic intervals is desirable in patients receiving prolonged therapy.  TIVORBEX is not indicated for long-term treatment.

The following adverse reactions are discussed in greater detail in other sections of the labeling:

• Cardiovascular Thrombotic Events [see Warnings and Precautions (5.1)]
  
• GI Bleeding, Ulceration and Perforation [see Warnings and Precautions (5.2)]
  
• Hepatotoxicity [see Warnings and Precautions (5.3)]
  
• Hypertension [see Warnings and Precautions (5.4)]
  
• Heart Failure and Edema [see Warnings and Precautions (5.5)]
  
• Renal Toxicity and Hyperkalemia [see Warnings and Precautions (5.6)]
  
• Anaphylactic Reactions [see Warnings and Precautions (5.7)]
  
• Serious Skin Reactions [see Warnings and Precautions (5.9)]
  
• Hematologic Toxicity [see Warnings and Precautions (5.11)]

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 clinical practice.

Five hundred and fifty-four patients (554) received TIVORBEX 20 mg or 40 mg for up to 48 hours in two double-blind, placebo-controlled, clinical trials of acute pain following bunionectomy. The most frequent adverse reactions in these trials are summarized below.

The following adverse reactions have been identified during post approval use of indomethacin. Because these 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.

Gastrointestinal: anorexia, bloating (includes distension), flatulence, peptic ulcer, gastroenteritis, rectal bleeding, proctitis, single or multiple ulcerations, including perforation and hemorrhage of the esophagus, stomach, duodenum or small and large intestines intestinal ulceration associated with stenosis and obstruction, gastrointestinal bleeding without obvious ulcer formation and perforation of preexisting sigmoid lesions (diverticulum, carcinoma, etc) development of ulcerative colitis and regional ileitis ulcerative stomatitis, toxic hepatitis and jaundice (some fatal cases have been reported), intestinal strictures (diaphragms), pancreatitis.

Cardiovascular: hypertension, hypotension, tachycardia, chest pain, congestive heart failure, arrhythmia, palpitations.

Hematologic: leukopenia, bone marrow depression, anemia secondary to obvious or occult gastrointestinal bleeding, aplastic anemia, hemolytic anemia, agranulocytosis, thrombocytopenic purpura, disseminated intravascular coagulation.

Central Nervous System: anxiety (includes nervousness), muscle weakness, involuntary muscle movements, insomnia, confusion, psychic disturbances including psychotic episodes, mental confusion, drowsiness, light-headedness, syncope, paresthesia, aggravation of epilepsy and parkinsonism, depersonalization, coma, peripheral neuropathy, convulsion, dysarthria.

Hypersensitivity: acute anaphylaxis, acute respiratory distress rapid fall in blood pressure resembling a shock-like state, angioedema, dyspnea, asthma, purpura, angiitis, pulmonary edema, fever.

Metabolic: edema, weight gain, fluid retention, flushing or sweating, hyperglycemia, glycosuria, hyperkalemia

Genitourinary: hematuria, vaginal bleeding, proteinuria, nephrotic syndrome, interstitial nephritis: BUN elevation, renal insufficiency, including renal failure.

Special Senses: ocular — corneal deposits and retinal disturbances, including those of the macula, have been reported in some patients on prolonged therapy with indomethacin; blurred vision, diplopia, hearing disturbances, deafness.

Skin and Appendages: pruritus, rash, urticaria, petechiae or ecchymosis, exfoliative dermatitis, erythema nodosum, loss of hair, Stevens-Johnson syndrome, erythema multiforme, toxic epidermal necrolysis.

Miscellaneous: epistaxis, breast changes, including enlargement and tenderness, gynecomastia

Causal relationship unknown

Other reactions have been reported but occurred under circumstances where a causal relationship could not be established. However, in these rarely reported events, the possibility cannot be excluded.  Therefore, these observations are being listed to serve as alerting information to physicians:

Cardiovascular: Thrombophlebitis

Hematologic: Although there have been several reports of leukemia, the supporting information is weak

Genitourinary: Urinary frequency

Musculoskeletal and Connective Tissue: A rare occurrence of fulminant necrotizing fasciitis, particularly in association with Group Ab hemolytic streptococcus, has been described in persons treated with nonsteroidal anti-inflammatory agents, including indomethacin, sometimes with fatal outcome [see Warnings and Precautions (5.9)].

See Table 2 for clinically significant drug interactions with indomethacin.

Effects on Laboratory Tests

Indomethacin reduces basal plasma renin activity (PRA), as well as those elevations of PRA induced by furosemide administration, or salt or volume depletion. These facts should be considered when evaluating plasma renin activity in hypertensive patients.

False-negative results in the dexamethasone suppression test (DST) in patients being treated with indomethacin have been reported. Thus, results of the DST should be interpreted with caution in these patients.

Pregnancy Category C in the first and second trimesters of pregnancy; Category D in the third trimester.

Risk Summary

Use of NSAIDs, including TIVORBEX, during the third trimester of pregnancy increases the risk of premature closure of the fetal ductus arteriosus. Avoid use of NSAIDs, including TIVORBEX, in pregnant women starting at 30 weeks of gestation (third trimester).

There are no adequate and well-controlled studies of TIVORBEX in pregnant women.

Data from observational studies regarding potential embryofetal risks of NSAID use in women in the first or second trimesters of pregnancy are inconclusive. In the general U.S. population, all clinically recognized pregnancies, regardless of drug exposure, have a background rate of 2-4% for major malformations, and 15-20% for pregnancy loss. In animal reproduction studies, retarded fetal ossification was observed with administration of indomethacin to mice and rats during organogenesis at doses 0.16 and 0.32 times, respectively, the maximum recommended human dose (MRHD, 120 mg).  In published studies in pregnant mice, indomethacin produced maternal toxicity and death, increased fetal resorptions, and fetal malformations at 0.2 times the MRHD. When rat and mice dams were dosed during the last three days of gestation, indomethacin produced neuronal necrosis in the offspring at 0.1 and 0.05 times the MRHD, respectively [see Data].  Based on animal data, prostaglandins have been shown to have an important role in endometrial vascular permeability, blastocyst implantation, and decidualization. In animal studies, administration of prostaglandin synthesis inhibitors such as indomethacin, resulted in increased pre- and post-implantation loss.

Clinical Considerations

Labor or Delivery

There are no studies on the effects of TIVORBEX during labor or delivery. In animal studies, NSAIDs, including indomethacin, inhibit prostaglandin synthesis, cause delayed parturition, and increase the incidence of stillbirth.

Data

Animal data

Reproductive studies were conducted in mice and rats at dosages of 0.5, 1.0, 2.0, and 4.0 mg/kg/day. Except for retarded fetal ossification at 4 mg/kg/day (0.16 times [mice] and 0.32 times [rats] the MRHD on a mg/m² basis, respectively) considered secondary to the decreased average fetal weights, no increase in fetal malformations was observed as compared with control groups. Other studies in mice reported in the literature using higher doses (5 to 15 mg/kg/day, 0.20 to 0.60 times MRHD on a mg/m² basis) have described maternal toxicity and death, increased fetal resorptions, and fetal malformations.

In rats and mice, maternal indomethacin administration of 4.0 mg/kg/day (0.32 and 0.16 times the MRHD on a mg/m² basis) during the last 3 days of gestation was associated with an increased incidence of neuronal necrosis in the diencephalon in the live-born fetuses however no increase in neuronal necrosis was observed at 2.0 mg/kg/day as compared to the control groups (0.16 and 0.08 times the MRHD on a mg/m² basis).  Administration of 0.5 or 4.0 mg/kg/day to offspring during the first 3 days of life did not cause an increase in neuronal necrosis at either dose level.

Risk Summary

Based on available published clinical data, indomethacin may be present in human milk.  The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for TIVORBEX and any potential adverse effects on the breastfed infant from the TIVORBEX or from the underlying maternal condition. 

Data

In one study, levels of indomethacin in breast milk were below the sensitivity of the assay (<20 mcg/L) in 11 of 15 women using doses ranging from 75 mg orally to 300 mg rectally daily (0.94 to 4.29 mg/kg daily) in the postpartum period.  Based on these levels, the average concentration present in breast milk was estimated to be 0.27% of the maternal weight-adjusted dose. In another study indomethacin levels were measured in breast milk of eight postpartum women using doses of 75 mg daily and the results were used to calculate an estimated infant daily dose. The estimated infant dose of indomethacin from breast milk was less than 30 mcg/day or 4.5 mcg/kg/day assuming breast milk intake of 150 mL/kg/day. This is 0.5% of the maternal weight-adjusted dosage or about 3% of the neonatal dose for treatment of patent ductus arteriosus.

Infertility

Females

Based on the mechanism of action, the use of prostaglandin-mediated NSAIDs, including TIVORBEX, may delay or prevent rupture of ovarian follicles, which has been associated with reversible infertility in some women. Published animal studies have shown that administration of prostaglandin synthesis inhibitors has the potential to disrupt prostaglandin-mediated follicular rupture required for ovulation. Small studies in women treated with NSAIDs have also shown a reversible delay in ovulation. Consider withdrawal of NSAIDs, including TIVORBEX, in women who have difficulties conceiving or who are undergoing investigation of infertility.

The safety and effectiveness of TIVORBEX in pediatric patients 17 years of age and younger has not been established. 

Elderly patients, compared to younger patients, are at greater risk for NSAID-associated serious cardiovascular, gastrointestinal, and/or renal adverse reactions. If the anticipated benefit for the elderly patient outweighs these potential risks, start dosing at the low end of the dosing range, and monitor patients for adverse effects [see Warnings and Precautions (5.1, 5.2, 5.3, 5.6, 5.13)].

Indomethacin may cause confusion or rarely, psychosis [see Adverse Reactions (6.1)]; physicians should remain alert to the possibility of such adverse effects in the elderly.

Indomethacin and its metabolites are known to be substantially excreted by the kidneys, and the risk of adverse reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, use caution in this patient population, and it may be useful to monitor renal function [see Clinical Pharmacology (12.3)].

Symptoms following acute NSAID overdosages have been typically limited to lethargy, drowsiness, nausea, vomiting, and epigastric pain, which have been generally reversible with supportive care. Gastrointestinal bleeding has occurred. Hypertension, acute renal failure, respiratory depression, and coma have occurred, but were rare [see Warnings and Precautions (5.1, 5.2, 5.4,5.6)].

Manage patients with symptomatic and supportive care following an NSAID overdosage.  There are no specific antidotes. Consider emesis and/or activated charcoal (60 to 100 grams in adults, 1 to 2 grams per kg of body weight in pediatric patients) and/or osmotic cathartic in symptomatic patients seen within four hours of ingestion or in patients with a large overdosage (5 to 10 times the recommended dosage). Forced diuresis, alkalinization of urine, hemodialysis, or hemoperfusion may not be useful due to high protein binding.

For additional information about overdosage treatment contact a poison control center (1-800-222-1222).

TIVORBEX (indomethacin) capsule is a nonsteroidal anti-inflammatory drug, available as hard gelatin capsules of 20 mg and 40 mg for oral administration. The chemical name is 1-(4-chlorobenzoyl)-5-methoxy-2-methyl-1H-indole-3-acetic acid. The molecular weight is 357.8. Its molecular formula is C₁₉H₁₆ClNO₄, and it has the following chemical structure.

The Following Chemical Structure For Tivorbex (indomethacin) Capsule Is A Nonsteroidal Anti-inflammatory Drug, Available As Hard Gelatin Capsules Of 20 mg And 40 mg For Oral Administration. The Chemical Name Is 1-(4-chlorobenzoyl)-5-methoxy-2-methyl-1h-indole-3-acetic Acid. The Molecular Weight Is 357.8. Its Molecular Formula Is C19h16clno4. (Tivorbex 01)

Indomethacin is a white to yellow crystalline powder. It is practically insoluble in water and sparingly soluble in alcohol.  Indomethacin has a pKa of 4.5 and is stable in neutral or slightly acidic media and decomposes in strong alkali.

The inactive ingredients in TIVORBEX include: lactose monohydrate, sodium lauryl sulfate, microcrystalline cellulose, croscarmellose sodium and sodium stearyl fumarate. The capsule shells contain gelatin, titanium dioxide, and dyes FD&C blue #1, FD&C blue #2 and FD&C red #40. The imprinting on the gelatin capsules is white edible ink. The 20 mg capsules have a dark blue body imprinted with IP-201 and light blue cap imprinted with 20 mg in white ink. The 40 mg capsules have a dark blue body imprinted with IP-202 and blue cap imprinted with 40 mg in white ink. 

Indomethacin has analgesic, anti-inflammatory, and antipyretic properties.

The mechanism of action of TIVORBEX, like that of other NSAIDs, is not completely understood but involves inhibition of cyclooxygenase (COX-1 and COX-2).

Indomethacin is a potent inhibitor of prostaglandin synthesis in vitro. Indomethacin concentrations reached during therapy have produced in vivo effects. Prostaglandins sensitize afferent nerves and potentiate the action of bradykinin in inducing pain in animal models. Prostaglandins are mediators of inflammation. Because indomethacin is an inhibitor of prostaglandin synthesis, its mode of action may be due to a decrease of prostaglandins in peripheral tissues.

The relative bioavailability of TIVORBEX 40 mg capsules was compared to indomethacin immediate-release (IR) capsules 50 mg in 38 healthy subjects under fasted conditions in a single-dose crossover study.

TIVORBEX (indomethacin) 40 mg capsules do not result in an equivalent systemic exposure to 50 mg indomethacin IR capsules.

When taken under fasted conditions, a 20% lower dose of indomethacin in TIVORBEX 40 mg capsules resulted in a 21% lower mean systemic exposure (AUC_inf) and an equivalent mean peak concentration (C_max) compared to 50 mg indomethacin IR capsules.  The median time to reach peak concentrations (T_max) was 1.67 hours and 2.02 hours for TIVORBEX capsules and Indomethacin IR capsules, respectively.

Absorption

Similar to indomethacin IR capsules, following single oral doses of TIVORBEX capsules 20 mg or 40 mg, indomethacin is readily absorbed.  TIVORBEX Capsules attained peak plasma concentrations of approximately 1.2 and 2.4 mcg/mL, respectively, at 1.67 hours.  Indomethacin is virtually 100% bioavailable, with 90% of the dose absorbed within 4 hours following dosing.

Administration of TIVORBEX Capsules 20 mg and 40 mg was associated with dose proportional pharmacokinetics.

Taking TIVORBEX with food causes a significant decrease in the rate but not the overall extent of systemic absorption of indomethacin compared to taking TIVORBEX on an empty stomach. TIVORBEX capsules results in 46% lower C_max, 9% lower AUC_inf, and 1.33 hours delayed T_max (1.67 hours during fasted versus 3.00 hours during fed) under the fed condition compared to the fasted condition. Based on the food effect evaluation on the indomethacin IR capsules, the effect of food on indomethacin pharmacokinetics is comparable between TIVORBEX capsules and indomethacin IR capsules.

Distribution

Indomethacin is highly bound to protein in plasma (about 99%) over the expected range of therapeutic plasma concentrations.  Indomethacin crosses the blood-brain barrier and the placenta, and appears in breast milk.

Elimination

Metabolism

Indomethacin exists in the plasma as the parent drug and its desmethyl, desbenzoyl, and desmethyldesbenzoyl metabolites, all in the unconjugated form. Appreciable formation of glucuronide conjugates of each metabolite and of indomethacin are formed.

Excretion

Indomethacin is eliminated via metabolism and subsequent renal and biliary excretion. Indomethacin undergoes appreciable enterohepatic circulation. About 60% of an oral dose is recovered in urine as drug and metabolites (26% as indomethacin and its glucuronide), and 33% is recovered in feces (1.5% as indomethacin). The mean half-life of indomethacin from TIVORBEX capsules 40 mg is 7.6 hours and is comparable to indomethacin IR capsules 50 mg (7.2 hours).

Specific Populations

Pediatric: The pharmacokinetics of TIVORBEX has not been investigated in pediatric patients.

Race: Pharmacokinetic differences due to race have not been identified.

Hepatic Impairment: The pharmacokinetics of TIVORBEX has not been investigated in patients with hepatic impairment.

Renal Impairment: The pharmacokinetics of TIVORBEX has not been investigated in patients with renal impairment [see Warnings and Precautions (5.6)].

Drug Interaction Studies

Aspirin:

In a study in normal volunteers, it was found that chronic concurrent administration of 3.6 g of aspirin per day decreases indomethacin blood levels approximately 20% [see Drug Interactions (7)].

When NSAIDs were administered with aspirin, the protein binding of NSAIDs were reduced, although the clearance of free NSAID was not altered. The clinical significance of this interaction is not known. See Table 2 for clinically significant drug interactions of NSAIDs with aspirin [see Drug Interactions (7)].  

Diflunisal:

In normal volunteers receiving indomethacin, the administration of diflunisal decreased the renal clearance and significantly increased the plasma levels of indomethacin [see Drug Interactions (7)].

Carcinogenesis

In an 81-week chronic oral toxicity study in the rat at doses up to 1 mg/kg/day (0.08 times the MRHD on a mg/m² basis), indomethacin had no tumorigenic effect. Indomethacin produced no neoplastic or hyperplastic changes related to treatment in carcinogenic studies in the rat (dosing period 73 to 110 weeks) and the mouse (dosing period 62 to 88 weeks) at doses up to 1.5 mg/kg/day (0.06 times [mice] and 0.12 times [rats] the MRHD on a mg/m² basis, respectively).

Mutagenesis

Indomethacin did not have any mutagenic effect in in vitro bacterial tests and a series of in vivo tests including the host-mediated assay, sex-linked recessive lethals in Drosophila, and the micronucleus test in mice.

Impairment of Fertility

Indomethacin at dosage levels up to 0.5 mg/kg/day had no effect on fertility in mice in a two generation reproduction study (0.02 times the MRHD on a mg/m² basis) or a two litter reproduction study in rats (0.04 times the MRHD on a mg/m² basis).

The efficacy of TIVORBEX for the treatment of acute pain was demonstrated in two multicenter, randomized, double-blind, placebo-controlled, parallel arm studies comparing TIVORBEX 20 mg three times daily, 40 mg twice daily, 40 mg three times daily, and placebo in patients with pain following bunionectomy (Study 1 and Study 2). The two studies enrolled a total of 835 patients with a mean age of 40 years (range 18 to 68 years) a minimal pain intensity rating of at least 40 mm on a 100-mm visual analog scale (VAS) during the 9-hour period after discontinuation of the anesthetic block following bunionectomy surgery. Patients were randomized equally across the treatment groups.

The mean pain intensity measured by VAS at baseline for all treatment groups in both studies ranged from 71 to 74 mm.  One tablet of hydrocodone/acetaminophen 10 mg/325 mg was permitted every 4 to 6 hours as rescue medication. There was a greater use of concomitant opioid rescue medication in placebo-treated patients than in TIVORBEX-treated patients. In Study 1, 89% of patients in the TIVORBEX 20 mg three times daily group, 90% of the patients in the TIVORBEX 40 mg twice daily group, 82% in the TIVORBEX 40 mg three times daily group, and 97% of patients in the placebo group took rescue medication for pain management during the study.  In Study 2, 87% of patients in the TIVORBEX 20 mg three times daily group, 76% of the patients in the TIVORBEX 40 mg twice daily group, 80% in the TIVORBEX 40 mg three times daily group, and 89% of patients in the placebo group took rescue medication for pain management during the study.

The average pain intensities over time are depicted for the treatment groups in Figure 1 for Study 1 and Figure 2 for Study 2. In both studies, TIVORBEX Capsules 20 mg three times daily, 40 mg twice daily and 40 mg three times daily, demonstrated efficacy in pain intensity reduction compared with placebo, as measured by the sum of pain intensity difference over 0 to 48 hours after the first dose.

Figure 1 Average Pain Intensity Over 48 Hours For Tivorbex And Placebo Groups – Study 1 (Tivorbex 02)

Figure 2 Average Pain Intensity Over 48 Hours For Tivorbex And Placebo Groups – Study 2 (Tivorbex 03)

TIVORBEX (indomethacin) are supplied as:

• 20 mg, dark blue body and light blue cap (imprinted IP-201 on the body and 20 mg on the cap in white ink)
  • NDC 42211-201-23, Bottles of 30 capsules
  • NDC 42211-201-29, Bottles of 90 capsules
  
• 40 mg, dark blue body and blue cap (imprinted IP-202 on the body and 40 mg on the cap in white ink)
  • NDC 42211-202-23, Bottles of 30 capsules
  • NDC 42211-202-29, Bottles of 90 capsules

Storage

Store at room temperature 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].

Store in the original container and keep the bottle tightly closed to protect from moisture and light.  Dispense in a tight container if package is subdivided.

Advise the patient to read the FDA-approved patient labeling (Medication Guide) that accompanies each prescription dispensed. Inform patients, families, or their caregivers of the following information before initiating therapy with TIVORBEX and periodically during the course of ongoing therapy.  

Cardiovascular Thrombotic Events

Advise patients to be alert for the symptoms of cardiovascular thrombotic events, including chest pain, shortness of breath, weakness, or slurring of speech, and to report any of these symptoms to their health care provider immediately [see Warnings and Precautions (5.1)].

Gastrointestinal Bleeding, Ulceration, and Perforation

Advise patients to report symptoms of ulcerations and bleeding, including epigastric pain, dyspepsia, melena, and hematemesis to their health care provider. In the setting of concomitant use of low-dose aspirin for cardiac prophylaxis, inform patients of the increased risk for and the signs and symptoms of GI bleeding [see Warnings and Precautions (5.2)].

Hepatotoxicity

Inform patients of the warning signs and symptoms of hepatotoxicity (e.g., nausea, fatigue, lethargy, pruritus, diarrhea, jaundice, right upper quadrant tenderness, and “flu-like” symptoms). If these occur, instruct patients to stop TIVORBEX and seek immediate medical therapy [see Warnings and Precautions (5.3)].

Heart Failure and Edema

Advise patients to be alert for the symptoms of congestive heart failure including shortness of breath, unexplained weight gain, or edema and to contact their healthcare provider if such symptoms occur [see Warnings and Precautions (5.5)].

Anaphylactic Reactions

Inform patients of the signs of an anaphylactic reaction (e.g., difficulty breathing, swelling of the face or throat). Instruct patients to seek immediate emergency help if these occur [see Contraindications (4) and Warnings and Precautions (5.7)].

Serious Skin Reactions

Advise patients to stop TIVORBEX immediately if they develop any type of rash and to contact their healthcare provider as soon as possible [see Warnings and Precautions (5.9)].

Female Fertility

Advise females of reproductive potential who desire pregnancy that NSAIDs, including TIVORBEX, may be associated with a reversible delay in ovulation [see Use in Specific Populations (8.3)].

Fetal Toxicity

Inform pregnant women to avoid use of TIVORBEX and other NSAIDs starting at 30 weeks gestation because of the risk of the premature closing of the fetal ductus arteriosus [see Warnings and Precautions (5.10) and Use in Specific Populations (8.1)].

Avoid Concomitant Use of NSAIDs

Inform patients that the concomitant use of TIVORBEX with other NSAIDs or salicylates (e.g., diflunisal, salsalate) is not recommended due to the increased risk of gastrointestinal toxicity, and little or no increase in efficacy [see Warnings and Precautions (5.2) and Drug Interactions (7)]. Alert patients that NSAIDs may be present in “over the counter” medications for treatment of colds, fever, or insomnia.

Use of NSAIDs and Low-Dose Aspirin

Inform patients not to use low-dose aspirin concomitantly with TIVORBEX until they talk to their healthcare provider [see Drug Interactions (7)].

Manufactured (under license from iCeutica Pty Ltd.) for and Distributed by:

Iroko Pharmaceuticals, LLC

Philadelphia, PA 19112

Issued: January 2018