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Naproxen Tablets, USPRx Only
- WARNING: RISK OF SERIOUS CARDIOVASCULAR AND GASTROINTESTINAL EVENTSCardiovascular 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
- Naproxen is contraindicated in the setting of coronary artery bypass graft (CABG) surgery (see
- CONTRAINDICATIONS, WARNINGS).
- Gastrointestinal Bleeding, Ulceration, and PerforationNSAIDs cause an increased risk of serious gastrointestinal 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
DESCRIPTIONNaproxen is a propionic acid derivative related to the arylacetic acid group of nonsteroidal anti-inflammatory drugs.The chemical name for naproxen is (S)-6-methoxy-a-methyl-2-naphthaleneacetic acid. It has the following structure:Molecular Formula of C
3MW = 230.26Naproxen has a molecular weight of 230.26 and a molecular formula of C
Naproxen is an odorless, white to off-white crystalline substance. It is lipid-soluble, practically insoluble in water at low pH and freely soluble in water at high pH. The octanol/water partition coefficient of naproxen at pH 7.4 is 1.6 to 1.8.Naproxen tablets are available as white tablets containing 250 mg, 375 mg and 500 mg of naproxen for oral administration. The inactive ingredients are croscarmellose sodium, povidone and magnesium stearate.
CLINICAL PHARMACOLOGYMechanism of ActionNaproxen has analgesic, anti-inflammatory, and antipyretic properties. The mechanism of action of the naproxen, like that of other NSAIDs, is not completely understood but involves inhibition of cyclooxygenase (COX-1 and COX-2).PharmacokineticsNaproxen is rapidly and completely absorbed from the gastrointestinal tract with an in vivo bioavailability of 95%. The elimination half-life of naproxen ranges from 12 to 17 hours. Steady-state levels of naproxen are reached in 4 to 5 days, and the degree of naproxen accumulation is consistent with this half-life.AbsorptionAfter administration of naproxen tablets, peak plasma levels are attained in 2 to 4 hours.Distribution Naproxen has a volume of distribution of 0.16 L/kg. At therapeutic levels naproxen is greater than 99% albumin-bound. At doses of naproxen greater than 500 mg/day there is less than proportional increase in plasma levels due to an increase in clearance caused by saturation of plasma protein binding at higher doses (average trough C
ss 36.5, 49.2 and 56.4 mg/L with 500, 1000 and 1500 mg daily doses of naproxen, respectively). The naproxen anion has been found in the milk of lactating women at a concentration equivalent to approximately 1% of maximum naproxen concentration in plasma (see
PRECAUTIONS: Nursing Mothers).
Elimination Metabolism Naproxen is extensively metabolized in the liver to 6-0-desmethyl naproxen, and both parent and metabolites do not induce metabolizing enzymes. Both naproxen and 6-0-desmethyl naproxen are further metabolized to their respective acylglucuronide conjugated metabolites.ExcretionThe clearance of naproxen is 0.13 mL/min/kg. Approximately 95% of the naproxen from any dose is excreted in the urine, primarily as naproxen (< 1%), 6-0-desmethyl naproxen (< 1%) or their conjugates (66% to 92%). The plasma half-life of the naproxen anion in humans ranges from 12 to 17 hours. The corresponding half-lives of both naproxen's metabolites and conjugates are shorter than 12 hours, and their rates of excretion have been found to coincide closely with the rate of naproxen disappearance from the plasma. Small amounts, 3% or less of the administered dose, are excreted in the feces. In patients with renal failure metabolites may accumulate (see
WARNINGS: Renal Toxicity and Hyperkalemia).
Special Populations Pediatric Patients In pediatric patients aged 5 to 16 years with arthritis, plasma naproxen levels following a 5 mg/kg single dose of naproxen suspension (see
DOSAGE AND ADMINISTRATION) were found to be similar to those found in normal adults following a 500 mg dose. The terminal half-life appears to be similar in pediatric and adult patients. Pharmacokinetic studies of naproxen were not performed in pediatric patients younger than 5 years of age.
Geriatric Patients Studies indicate that although total plasma concentration of naproxen is unchanged, the unbound plasma fraction of naproxen is increased in the elderly, although the unbound fraction is < 1% of the total naproxen concentration. Unbound trough naproxen concentrations in elderly subjects have been reported to range from 0.12% to 0.19% of total naproxen concentration, compared with 0.05% to 0.075% in younger subjects. The clinical significance of this finding is unclear, although it is possible that the increase in free naproxen concentration could be associated with an increase in the rate of adverse events per a given dosage in some elderly patients.Race Pharmacokinetic differences due to race have not been studied.Hepatic Impairment Naproxen pharmacokinetics has not been determined in subjects with hepatic insufficiency.Chronic alcoholic liver disease and probably other diseases with decreased or abnormal plasma proteins (albumin) reduce the total plasma concentration of naproxen, but the plasma concentration of unbound naproxen is increased. Caution is advised when high doses are required and some adjustment of dosage may be required in these patients. It is prudent to use the lowest effective dose.Renal Impairment Naproxen pharmacokinetics has not been determined in subjects with renal insufficiency. Given that naproxen, its metabolites and conjugates are primarily excreted by the kidney, the potential exists for naproxen metabolites to accumulate in the presence of renal insufficiency. Elimination of naproxen is decreased in patients with severe renal impairment. Naproxen-containing products are not recommended for use in patients with moderate to severe and severe renal impairment (creatinine clearance < 30 mL/rnin) (see
WARNINGS: Renal Toxicity and Hyperkalemia).
Drug Interaction SudiesAspirin: 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 1 for clinically significant drug interactions of NSAIDs with aspirin (see
PRECAUTIONS: Drug Interactions).
CLINICAL STUDIES General Information Naproxen has been studied in patients with rheumatoid arthritis, osteoarthritis, juvenile arthritis, ankylosing spondylitis, tendonitis and bursitis, and acute gout. Improvement in patients treated for rheumatoid arthritis was demonstrated by a reduction in joint swelling, a reduction in duration of morning stiffness, a reduction in disease activity as assessed by both the investigator and patient, and by increased mobility as demonstrated by a reduction in walking time. Generally, response to naproxen has not been found to be dependent on age, sex, severity or duration of rheumatoid arthritis.In patients with osteoarthritis, the therapeutic action of naproxen has been shown by a reduction in joint pain or tenderness, an increase in range of motion in knee joints, increased mobility as demonstrated by a reduction in walking time, and improvement in capacity to perform activities of daily living impaired by the disease.In a clinical trial comparing standard formulations of naproxen 375 mg twice a day (750 mg a day) vs 750 mg twice a day (1500 mg/day), 9 patients in the 750 mg group terminated prematurely because of adverse events. Nineteen patients in the 1500 mg group terminated prematurely because of adverse events. Most of these adverse events were gastrointestinal events.In clinical studies in patients with rheumatoid arthritis, osteoarthritis, and juvenile arthritis, naproxen has been shown to be comparable to aspirin and indomethacin in controlling the aforementioned measures of disease activity, but the frequency and severity of the milder gastrointestinal adverse effects (nausea, dyspepsia, heartburn) and nervous system adverse effects (tinnitus, dizziness, lightheadedness) were less in naproxen-treated patients than in those treated with aspirin or indomethacin.In patients with ankylosing spondylitis, naproxen has been shown to decrease night pain, morning stiffness and pain at rest. In double-blind studies the drug was shown to be as effective as aspirin, but with fewer side effects.In patients with acute gout, a favorable response to naproxen was shown by significant clearing of inflammatory changes (e.g., decrease in swelling, heat) within 24 to 48 hours, as well as by relief of pain and tenderness.Naproxen has been studied in patients with mild to moderate pain secondary to postoperative, orthopedic, postpartum episiotomy and uterine contraction pain and dysmenorrhea. Onset of pain relief can begin within 1 hour in patients taking naproxen and within 30 minutes in patients taking naproxen sodium. Analgesic effect was shown by such measures as reduction of pain intensity scores, increase in pain relief scores, decrease in numbers of patients requiring additional analgesic medication, and delay in time to remedication. The analgesic effect has been found to last for up to 12 hours.Naproxen may be used safely in combination with gold salts and/or corticosteroids; however, in controlled clinical trials, when added to the regimen of patients receiving corticosteroids, it did not appear to cause greater improvement over that seen with corticosteroids alone. Whether naproxen has a "steroid-sparing" effect has not been adequately studied. When added to the regimen of patients receiving gold salts, naproxen did result in greater improvement. Its use in combination with salicylates is not recommended because there is evidence that aspirin increases the rate of excretion of naproxen and data are inadequate to demonstrate that naproxen and aspirin produce greater improvement over that achieved with aspirin alone. In addition, as with other NSAIDs, the combination may result in higher frequency of adverse events than demonstrated for either product alone.In
51Cr blood loss and gastroscopy studies with normal volunteers, daily administration of 1000 mg of naproxen has been demonstrated to cause statistically significantly less gastric bleeding and erosion than 3250 mg of aspirin.
Geriatric Patients The hepatic and renal tolerability of long-term naproxen administration was studied in two double-blind clinical trials involving 586 patients. Of the patients studied, 98 patients were age 65 and older and 10 of the 98 patents were age 75 and older. Naproxen was administered at doses of 375 mg twice daily or 750 mg twice daily for up to 6 months. Transient abnormalities of laboratory tests assessing hepatic and renal functon were noted in some patients, although there were no differences noted in the occurrence of abnorma values among different age groups.
Indications And Usage
- INDICATIONS AND USAGE Carefully consider the potential benefits and risks of naproxen and other treatment options before deciding to use naproxen tablets. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals (see
- WARNINGS: Gastrointestinal Bleeding, Ulceration, and Perforation).
- Naproxen tablets are indicated:For the relief of the signs and symptoms of rheumatoid arthritisFor the relief of the signs and symptoms of osteoarthritisFor the relief of the signs and symptoms of ankylosing spondylitisFor the relief of the signs and symptoms of juvenile arthritisNaproxen tablets are also indicated:For relief of the signs and symptoms of tendonitisFor relief of the signs and symptoms of bursitisFor relief of the signs and symptoms of acute goutFor the management of painFor the management of primary dysmenorrhea
CONTRAINDICATIONSNaproxen tablets are contraindicated in the following patients:• Known hypersensitivity (e.g., anaphylactic reactions and serious skin reactions) to naproxen, naproxen sodium, or any components of the drug product (see
WARNINGS: Anaphylactic Reactions, Serious Skin Reactions).
• 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: Anaphylactic Reactions, Exacerbation of Asthma Related to Aspirin Sensitivity).
• In the setting of coronary artery bypass graft (CABG) surgery (see
WARNINGS: Cardiovascular Thrombotic Events)
WARNINGS Cardiovascular Thrombotic Events 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, myocardial infarction, 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 naproxen, increases the risk of serious gastrointestinal (GI) events (see
WARNINGS: Gastrointestinal Bleeding, Ulceration, and Perforation).
Status Post Coronary Artery 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
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 naproxen in patients with a recent MI unless the benefits are expected to outweigh the risk of recurrent CV thrombotic events. If naproxen is used in patients with a recent MI, monitor patients for signs of cardiac ischemia.Gastrointestinal Bleeding, Ulceration, and Perforation NSAIDs, including naproxen 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 PerforationPatients 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 inhibtors (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 naproxen 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
PRECAUTIONS: Drug Interactions).
Hepatotoxicity Elevations of ALT or AST (three or more times the upper limit of normal [ULN]) have been reported in approximately 1% of 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 taking NSAIDs including naproxen.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 naproxen immediately, and perform a clinical evaluation of the patient.Hypertension NSAIDs, including naproxen, can lead to onset of new hypertension or worsening of pre-existing hypertension, either of which may contribute to the increased incidence of CV events. Patients taking angiotensin converting enzyme (ACE) inhibitors, thiazides or loop diuretics may have impaired response to these therapies when taking NSAIDs (see
PRECAUTIONS; Drug Interactions).
Monitor blood pressure (BP) during the initiation of NSAID treatment and throughout the course of therapy.Heart Failure and Edema The Coxib and traditional NSAID Trialists' Collaboration meta-analysis of randomized controlled trials demonstrated an approximately two-fold increase in hospitalization 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 naproxen 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
PRECAUTIONS; Drug Interactions).
Avoid the use of naproxen in patients with severe heart failure unless the benefits are expected to outweigh the risk of worsening heart failure. If naproxen is used in patients with severe heart failure, monitor patients for signs of worsening heart failure.Renal Toxicity and Hyperkalemia 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, hypovolemia, heart failure, liver dysfunction, salt depletion, 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 naproxen in patients with advanced renal disease. The renal effects of naproxen may hasten the progression of renal dysfunction in patients with preexisting renal disease.Correct volume status in dehydrated or hypovolemic patients prior to initiating naproxen. Monitor renal function in patients with renal or hepatic impairment, heart failure, dehydration, or hypovolemia during use of naproxen (see
PRECAUTIONS; Drug Interactions). Avoid the use of naproxen in patients with advanced renal disease unless the benefits are expected to outweigh the risk of worsening renal function. If naproxen is used in patients with advanced renal disease, monitor patients for signs of worsening renal function.
Hyperkalema 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.Anaphylactoid Reactions Naproxen has been associated with anaphylactic reactions in patients with and without known hypersensitivity to naproxen and in patients with aspirin-sensitive asthma (see
CONTRAINDICATIONS, WARNINGS: Exacerbation of Asthma Related to Aspirin Sensitivity).
Exacerbation of Asthma Related to Aspirin Sensitivity 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, naproxen tablets are contraindicated in patients with this form of aspirin sensitivity (see
CONTRAINDICATIONS). When naproxen tablets are used in patients with preexisting asthma (without known aspirin sensitivity), monitor patients for changes in the signs and symptoms of asthma.
Serious Skin Reactions NSAIDs, including naproxen, can cause serious skin adverse events such as exfoliative dermatitis, Stevens-Johnson Syndrome (SJS), and toxic epidermal necrolysis (TEN), which can be fatal. These serious events may occur without warning. Patients should be informed about the signs and symptoms of serious skin manifestations and to discontinue the use of naproxen at the first appearance of skin rash or any other sign of hypersensitivity. Naproxen tablets are contraindicated in patients with previous serious skin reactions to NSAIDs (see
Premature Closure of Fetal Ductus Arteriosus Naproxen may cause premature closure of the fetal ductus arteriosus. Avoid use of NSAIDs. including naproxen, in pregnant women starting at 30 weeks of gestation (third trimester) (see
Hematologic Toxicity 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 naproxen has any signs or symptoms of anemia, monitor hemoglobin or hematocrit.NSAIDs, including naproxen, may increase the risk of bleeding events. Co-morbid conditions such as coagulation disorders, or concomitant use of warfarin and other anticoagulants, antiplatelet agents (e.g., aspirin), serotonin reuptake inhibitors (SSR1s) and serotonin norepinephrine reuptake inhibitors (SNRIs) may increase this risk. Monitor these patients for signs of bleeding (see
PRECAUTIONS: Drug Interactions).
PRECAUTIONS General Naproxen-containing products and other naproxen products should not be used concomitantly since they all circulate in the plasma as the naproxen anion.Naproxen cannot be expected to substitute for corticosteroids or to treat corticosteroid insufficiency. Abrupt discontinuation of corticosteroids may lead to disease exacerbation. Patients on prolonged corticosteroid therapy should have their therapy tapered slowly if a decision is made to discontinue corticosteroids and the patient should be observed closely for any evidence of adverse effects, including adrenal insufficiency and exacerbation of symptoms of arthritis.Patients with initial hemoglobin values of 10 g or less who are to receive long-term therapy should have hemoglobin values determined periodically.Because of adverse eye findings in animal studies with drugs of this class, it is recommended that ophthalmic studies be carried out if any change or disturbance in vision occurs.Information for Patients 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 naproxen 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: Cardiovascular Thrombotic Events).
Gastrointestinal Bleeding, Ulceration, and PerforationAdvise 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 the signs and symptoms of GI bleeding (see
WARNINGS: Gastrointestinal Bleeding. Ulceration. and Perforation).
Hepatotoxicity Inform patients of the warning signs and symptoms of hepatotoxicity (e.g., nausea, fatigue, lethargy, pruritus, jaundice, right upper quadrant tenderness, and "flu-like" symptoms). If these occur, instruct patients to stop naproxen and seek immediate medical therapy (see
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: Heart Failure and Edema).
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
CONTRAINDICATION, WARNINGS; Anaphylactic Reactions).
Serious Skin Reactions Advise patients to stop naproxen immediately if they develop any type of rash and to contact their healthcare provider as soon as possible (see
WARNINGS: Serious Skin Reactions).
Female Fertility Advise females of reproductive potential who desire pregnancy that NSAIDs, including VOLTAREN, may be associated with a reversible delay in ovulation (see
PRECAUTIONS: Carcinogenesis, Mutagenesis, Impairment of Fertility).
Fetal Toxicity Inform pregnant women to avoid use of naproxen and other NSAIDs starting at 30 weeks gestation because of the risk of the premature closing of the fetal ductus arteriosus (see
WARNINGS: Premature Closure of Fetal Ductus Arteriosus).
Avoid Concomitant Use of NSAIDsInform patients that the concomitant use of naproxen 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: Gastrointestinal Bleeding, Ulceration, and Perforation, PRECAUTIONS; Drug Interactions). 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 AspirinInform patients not to use low-dose aspirin concomitantly with naproxen until they talk to their healthcare provider (see
PRECAUTIONS; Drug Interactions).
Activities Requiring Alertness Caution should be exercised by patients whose activities require alertness if they experience drowsiness, dizziness, vertigo or depression during therapy with naproxen.Masking of Inflammation and Fever The pharmacological activity of naproxen in reducing inflammation, and possibly fever, may diminish the utility of diagnostic signs in detecting infections.Laboratory Monitoring 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; Gastrointestinal Bleeding, Ulceration, and Perforation and Hepatotoxicity).
Table 1 for clinically significant drug interactions with naproxen.
Table 1: Clinically Significant Drug Interactions with naproxenDrugs That Interfere with HemostasisClinical Impact: • Naproxen and anticoagulants such as warfarin have a synergistic effect on bleeding. The concomitant use of naproxen and anticoagulants has an increased risk of serious bleeding compared to the use of either drug alone.• Serotonin release by platelets plays an important role in hemostasis. Case-control and cohort epidemiological studies showed that concomitant use of drugs that interfere with serotonin reuptake and an NSAID may potentiate the risk of bleeding more than an NSAID alone.Intervention: Monitor patients with concomitant use of naproxen with anticoagulants (e.g., warfarin), antiplatelet agents (e.g., aspirin), selective serotonin reuptake inhibitors (SSRIs), and serotonin norepinephrine reuptake inhibitors (SNRIs) for signs of bleeding (see
WARNINGS: Hematologic Toxicity).
AspirinClinical Impact: Controlled clinical studies showed that the concomitant use of NSAIDs and analgesic doses of aspirin does not produce any greater therapeutic effect than the use of NSAIDs alone. In a clinical study, the concomitant use of an NSAID and aspirin was associated with a significantly increased incidence of GI adverse reactions as compared to use of the NSAID alone (see
WARNINGS: Gastrointestinal Bleeding. Ulceration and Perforation).
Intervention:Concomitant use of naproxen and analgesic doses of aspirin is not generally recommended because of the increased risk of bleeding (see
WARNINGS: Hematologic Toxicity). Naproxen is not a substitute for low dose aspirin for cardiovascular protection.
ACE Inhibitors, Angiotensin Receptor Blockers, and Beta-Blockers Clinical Impact:• NSAIDs may diminish the antihypertensive effect of angiotensin converting enzyme Impact: (ACE) inhibitors, angiotensin receptor blqckers (ARBs), or beta-blockers (including propranolol).• In patients who are elderly, volume-depleted (including those on diuretic therapy), or have renal impairment, co-administrationiot an NSAID with ACE inhibitors or ARBsmay result in deterioration of renal function, including possible acute renal failure.These effects are usually reversible.Intervention:• During concomitant use of naproxen and ACE-inhibitors. ARBs, or beta-blockers, monitor blood pressure to ensure that the desired blood pressure is obtained.• During concomitant use of naproxen and ACE-inhibitors or ARBs in patients who are elderly, volume-depleted, or have impaired renal function, monitor for signs of worsening renal function (see
WARNINGS: Renal Toxicity and Hyperkalemia).
When these drugs are administered concomitantly, patients should be adequately hydrated. Assess renal function at the beginning of the concomitant treatment and periodically thereafter.Diuretics Clinical Impact: Clinical studies, as well as post-marketing observations, showed that NSAIDs reduced the natriuretic effect of loop diuretics (e.g., furosemide) and thiazide diuretics in some patients. This effect has been attributed to the NSAID inhibition of renal prostaglandin synthesis.Intervention:During concomitant use of naproxen with diuretics, observe patients for signs of worsening renal function, in addition to assuring diuretic efficacy including antihypertensive effects (see
WARNINGS; Renal Toxicity and Hyperkalemia).
DigoxinClinical Impact:The concomitant use of naproxen with digoxin has been reported to increase the serum concentration and prolong the half-life of digoxin.Intervention: During concomitant use of naproxen and digoxin, monitor serum digoxin levels.Lithium Clinical Impact:NSAIDs have produced elevations in plasma lithium levels and reductions in renal lithium clearance. The mean minimum lithium concentration increased 15%, and the renal clearance decreased by approximately 20%. This effect has been attributed to NSAID inhibition of renal prostaglandin synthesis.Intervention:During concomitant use of naproxen and lithium, monitor patients for signs of lithium toxicity.MethotrexateClinical Impact: Concomitant use of NSAIDs and methotrexate may increase the risk for methotrexate toxicity (e.g., neutropenia, thrombocytopenia, renal dysfunction).Intervention: During concomitant use of naproxen and methotrexate, monitor patients for methotrexate toxicity.Cyclosporine Clinical Impact: Concomitant use of naproxen and cyclosporine may increase cyclosporine's nephrotoxicity.Intervention: During concomitant use of naproxen and cyclosporine, monitor patients for signs of worsening renal function.NSAIDs and SalicylatesClinical Impact:Concomitant use of naproxen with other NSAIDs or salicylates (e.g., diflunisal, salsalate) increases the risk of GI toxicity, with little or no increase in efficacy (see
WARNINGS; Gastrointestinal Bleeding. Ulceration and Perforation).
Intervention:The concomitant use of naproxen with other NSAIDs or salicylates is not recommended.PemetrexedClinical Impact: Concomitant use of naproxen and pemetrexed may increase the risk of pemetrexed-associated myelosuppression, renal, and GI toxicity (see the pemetrexed prescribing information).Intervention: During concomitant use of naproxen and pemetrexed, in patients with renal impairment whose creatinine clearance ranges from 45 to 79 mUmin, monitor for myelosuppression, renal and GI toxicity. NSAIDs with short elimination half-lives (e.g., diclofenac, indomethacin) should be avoided for a period of two days before, the day of, and two days following administration of pemetrexed. In the absence of data regarding potential interaction between pemetrexed and NSAIDs with longer half-lives (e.g., meloxicam, nabumetone), patients taking these NSAIDs should interrupt dosing for at least five days before, the day of, and two days following pemetrexed administration.Antacids and SucralfateClinical Impact:Concomitant administration of some antacids (magnesium oxide or aluminum hydroxide) and sucralfate can delay the absorption of naproxen.Intervention: Concomitant administration of antacids such as magnesium oxide or aluminum hydroxide, and sucralfate with naproxen is not recommended. Due to the gastric pH elevating effects of H2-blockers, sucralfate and intensive antacid therapy, concomitant administration of naproxen is not recommended.Cholestyramine Clinical Impact:Concomitant administration of cholestyramine can delay the absorption of naproxen.Intervention: Concomitant administration of cholestyramine with naproxenis not recommended.ProbenecidClinical Impact:Probenecid given concurrently increases naproxen anion plasma levels and extends its plasma half-life significantly.Intervention:Patients simultaneously receiving naproxen and probenecid should be observed for adjustment of dose if required.Other albumin-bound drugsClinical Impact:Naproxen is highly bound to plasma albumin; it thus has a theoretical potential for interaction with other albumin-bound drugs such as coumarin-type anticoagulants, sulphonylureas, hydantoins, other NSAIDs, and aspirin.Intervention:Patients simultaneously receiving naproxen and a hydantoin, sulphonamide or sulphonylurea should be observed for adjustment of dose if required.Drug/Laboratory Test InteractionsBleeding times Clinical Impact:Naproxen may decrease platelet aggregation and prolong bleeding time.Intervention: This effect should be kept in mind when bleeding times are determined.Porter-Silber testClinical Impact:The administration of naproxen may result in increased urinary values for 17 ketogenic steroids because of an interaction between the drug and/or its metabolites with m-di-nitrobenzene used in this assay.Intervention: Although 17-hydroxy-corticosteroid measurements (Porter-Silber test) do not appear to be artifactually altered, it is suggested that therapy with naproxen be temporarily discontinued 72 hours before adrenal function tests are performed if the Porter-Silber test is to be used.Urinary assays of 5-hydroxy indoleacetic acid (5-HIAA)Clinical Impact:Naproxen may interfere with some urinary assays of 5-hydroxy indoleacetic acid (5-HIAA).Intervention:This effect should be kept in mind when urinary 5-hydroxy indoleacetic acid is determined.Carcinogenesis, Mutagenesis, Impairment of FertilityCarcinogenesisA 2-year study was performed in rats to evaluate the carcinogenic potential of naproxen at rat doses of 8, 16, and 24 mg/kg/day (0.05, 0.1, and 0.16 times the maximum recommended human daily dose [MRHD] of 1500 mg/day based on a body surface area comparison). No evidence of tumorigenicity was found.Mutagenesis Studies to evaluate the mutagenic potential of naproxen tablets have not been completed.Impairment of fertility Male rats were treated with 2, 5, 10, and 20 mg/kg naproxen by oral gavage for 60 days prior to mating and female rats were treated with the same doses for 14 days prior to mating and for the first 7 days of pregnancy. There were no adverse effects on fertility noted (up to 0.13 times the MR HD based on body surface area).Pregnancy Risk SummaryUse of NSAIDs, including naproxen, during the third trimester of pregnancy increases the risk of premature closure of the fetal ductus arteriosus. Avoid use of NSAIDs, including naproxen, in pregnant women starting at 30 weeks of gestation (third trimester) (see
WARNINGS; Premature Closure of Fetal Ductus Arteriosus).
There are no adequate and well-controlled studies of naproxen tablets in pregnant women.Data from observational studies regarding potential embryo fetal 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 in rats, rabbit, and mice no evidence of teratogenicity or fetal harm when naproxen was administered during the period of organogenesis at doses 0.13, 0.26, and 0.6 times the maximum recommended human daily dose of 1500 mg/day, respectively. 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 naproxen, resulted in increased pre- and post-implantation loss.DataHuman DataThere is some evidence to suggest that when inhibitors of prostaglandin synthesis are used to delay preterm labor there is an increased risk of neonatal complications such as necrotizing enterocolitis, patent ductus arteriosus and intracranial hemorrhage. Naproxen treatment given in late pregnancy to delay parturition has been associated with persistent pulmonary hypertension, renal dysfunction and abnormal prostaglandin E levels in preterm infants. Because of the known effects of nonsteroidal anti-inflammatory drugs on the fetal cardiovascular system (closure of ductus arteriosus), use during )regnancy (particularly starting at 30-weeks of gestation, or third trimester) should be avoided.Animal DataReproduction studies have been performed in rats at 20 mg/kg/day (0.13 times the maximum recommended human daily dose of 1500 mg/day based on body surface area comparison), rabbits at 20 mg/kg/day (0.26 times the maximum recommended human daily dose, based on body surface area omparison), and mice at 170 mg/kg/day (0.6 times the maximum recommended human daily dose )ased on body surface area comparison) with no evidence of impaired fertility or harm to the fetus due o the drug. 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 naproxen, resulted in increased pre- and post-implantation loss.Labor and Delivery There are no studies on the effects of naproxen tablets during labor or delivery. In animal studies, NSAIDS, including naproxen, inhibit prostaglandin synthesis, cause delayed parturition, and increase the incidence of stillbirth.Nursing MothersThe naproxen anion has been found in the milk of lactating women at a concentration equivalent to approximately 1% of maximum naproxen concentration in plasma. The developmental and health benefits of breastfeeding should be considered along with the mother's clinical need for naproxen tablets and any potential adverse effects on the breastfed infant from the naproxen tablets or from the underlying maternal condition.Females and Males of Reproductive Potential Based on the mechanism of action, the use of prostaglandin-mediated NSAIDs, including naproxen, 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 naproxen tablets, in women who have difficulties conceiving or who are undergoing investigation of infertility.Pediatric Use Safety and effectiveness in pediatric patients below the age of 2 years have not been established. Pediatric dosing recommendations for juvenile arthritis are based on well-controlled studies (see
DOSAGE AND ADMINISTRATION). There are no adequate effectiveness or dose-response data for other pediatric conditions, but the experience in juvenile arthritis and other use experience have established that single doses of 2.5 to 5 mg/kg (as naproxen suspension, see DOSAGE AND ADMINISTRATION), with total daily dose not exceeding 15 mg/kg/day, are well tolerated in pediatric patients over 2 years of age. Safety and effectiveness in pediatric patients below the age of 2 years have not been established.
Geriatric UseElderly 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; Cardiovascular Thrombotic Events, Gastrointestinal Bleeding, Ulceration, and Perforation, Hepatotoxicity, Renal Toxicity and Hyperkalemia and PRECAUTIONS,. Laboratory Monitoring).
Studies indicate that although total plasma concentration of naproxen is unchanged, the unbound plasma fraction of naproxen is increased in the elderly. Caution is advised when high doses are required and some adjustment of dosage may be required in elderly patients. As with other drugs used in the elderly, it is prudent to use the lowest effective dose.Experience indicates that geriatric patients may be particularly sensitive to certain adverse effects of nonsteroidal anti-inflammatory drugs. Elderly or debilitated patients seem to tolerate peptic ulceration or bleeding less well when these events do occur. Most spontaneous reports of fatal GI events are In the geriatric population (see
WARNINGS; Gastrointestinal Bleeding, Ulceration, and Perforation).
Naproxen is known to be substantially excreted by the kidney, and the risk of toxic reactions to this drug may be greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose selection, and it may be useful to monitor renal function. Geriatric patients may be at a greater risk for the development of a form of renal toxicity precipitated by reduced prostaglandin formation during administration of nonsteroidal anti-inflammatory drugs (see
WARNINGS; Renal Toxicity and Hyperkalemia).
- ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the labeling:Cardiovascular Thrombotic Events (see
- GI Bleeding, Ulceration and Perforation (see
- Hepatotoxicity (see
- Hypertension (see
- Heart Failure and Edema (see
- Renal Toxicity and Hyperkalemia (see
- Anaphylactic Reactions (see
- Serious Skin Reactions (see
- Hematologic Toxicity (see
- Adverse reactions reported in controlled clinical trials in 960 patients treated for rheumatoid arthritis or osteoarthritis are listed below. In general, reactions in patients treated chronically were reported 2 to 10 times more frequently than they were in short-term studies in the 962 patients treated for mild to moderate pain or for dysmenorrhea. The most frequent complaints reported related to the gastrointestinal tract.A clinical study found gastrointestinal reactions to be more frequent and more severe in rheumatoid arthritis patients taking daily doses of 1500 mg naproxen compared to those taking 750 mg naproxen (see
- CLINICAL PHARMACOLOGY).
- In controlled clinical trials with about 80 pediatric patients and in well-monitored, open-label studies with about 400 pediatric patients with juvenile arthritis treated with naproxen, the incidence of rash and prolonged bleeding times were increased, the incidence of gastrointestinal and central nervous system reactions were about the same, and the incidence of other reactions were lower in pediatric patients than in adults.In patients taking naproxen in clinical trials, the most frequently reported adverse experiences in approximately 1% to 10% of patients are:Gastrointestinal (GI) Experiences, including: heartburn*, abdominal pain*, nausea*, constipation*, diarrhea. dyspepsia, stomatitis
- Central Nervous System: headache*, dizziness', drowsiness*, lightheadedness, vertigo
- Dermatologic: pruritus (itching)', skin eruptions*, ecchymosis*, sweating, purpura
- Special Senses: tinnitust, visual disturbances, hearing disturbances
- Cardiovascular: edema*, palpitations
- General: dyspnea*, thirst
- *Incidence of reported reaction between 3% and 9%. Those reactions occurring in less than 3% of the patients are unmarked.In patients taking NSAIDs, the following adverse experiences have also been reported in approximately 1% to 10% of patients.Gastrointestinal (GI) Experiences, including: flatulence, gross bleeding/perforation, GI ulcers (gastric/ duodenal), vomiting
- General: abnormal renal function, anemia, elevated liver enzymes, increased bleeding time, rashes
- The following are additional adverse experiences reported in < 1% of patients taking naproxen during clinical trials and through postmarketing reports. Those adverse reactions observed through postmarketing reports are italicized.Body as a Whole: anaphylactoid reactions, angioneurotic edema, menstrual disorders, pyrexia (chills and fever)
- Cardiovascular: congestive heart failure, vasculitis, hypertension, pulmonary edema
- Gastrointestinal: inflammation, bleeding (sometimes fatal, particularly in the elderly), ulceration, perforation and obstruction of the upper or lower gastrointestinal tract. Esophagitis, stomatitis. hematemesis, pancreatitis, vomiting, colitis, exacerbation of inflammatory bowel disease (ulcerative colitis, Crohn's disease).
- Hepatobiliary: jaundice, abnormal liver function tests, hepatitis (some cases have been fatal)
- Hemic and Lymphatic: eosinophilia, leucopenia, melena, thrombocytopenia, agranulocytosis, granulocytopenia, hemolytic anemia, aplastic anemia
- Metabolic and Nutritional: hyperglycemia. hypoglycemia
- Nervous System: inability to concentrate, depression, dream abnormalities, insomnia, malaise, myalgia, muscle weakness, aseptic meningitis, cognitive dysfunction, convulsions
- Respiratory: eosinophilic pneumonitis, asthma
- Dermatologic: alopecia, urticaria, skin rashes, toxic epidermal necrolysis, erythema multiforme, erythema nodosum, fixed drug eruption, lichen planus, pustular reaction, systemic lupus erythematosus, bullous reactions, including Stevens-Johnson syndrome, photosensitive dermatitis, photosensitivity reactions, including rare cases resembling porphyria cutanea tarda (pseudoporphyria) or epidermolysis bullosa. If skin fragility, blistering or other symptoms suggestive of pseudoporphyria occur. treatment should be discontinued and the patient monitored.
- Special Senses: hearing impairment, corneal opacity, papiffitis, retrobulbar optic neuritis, papilledema
- Urogenital: glomerular nephritis, hematuria, hyperkalemia, interstitial nephritis, nephrotic syndrome, renal disease, renal failure, renal papillary necrosis, raised serum creatinine
- Reproduction (female): infertility
- In patients taking NSAIDs, the following adverse experiences have also been reported in < 1% of patients.Body as a Whole: fever, infection, sepsis, anaphylactic reactions, appetite changes, death
- Cardiovascular: hypertension, tachycardia, syncope, arrhythmia, hypotension, myocardial infarction
- Gastrointestinal: dry mouth, esophagitis, gastric/peptic ulcers, gastritis, glossitis, eructation
- Hepatobiliary: hepatitis, liver failure
- Hemic and Lymphatic: rectal bleeding, lymphadenopathy, pancytopenia
- Metabolic and Nutritional: weight changes
- Nervous System: anxiety, asthenia, confusion, nervousness, paresthesia. convulsions, coma, hallucinations
- Respiratory: asthma, respiratory depression, pneumonia
- Dermatologic: exfoliative dermatitis
- Special Senses: blurred vision, conjunctivitis
- Urogenital: cystitis, dysuria, oliguria/polyuria, proteinuria
OVERDOSAGE 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. Because naproxen sodium may be rapidly absorbed, high and early blood levels should be anticipated. A few patients have experienced convulsions, but it is not clear whether or not these were drug-related. It is not known what dose of the drug would be life threatening. (see
WARNINGS; Cardiovascular Thrombotic Events, Gastrointestinal Bleeding, Ulceration, and Perforation, Hypertension, Renal Toxicity and Hyperkalemia).
Manage patients with symptomatic and supportive care following an NSAID overdosage. There are no specific antidotes. Hemodialysis does not decrease the plasma concentration of naproxen because of the high degree of its protein binding. Consider emesis and/or activated charcoal (60 to 100 g in adults, 1 to 2 g/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).
Dosage And Administration
DOSAGE AND ADMINISTRATIONCarefully consider the potential benefits and risks of naproxen and other treatment options before deciding to use naproxen tablets. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals (see WARNINGS: Gastrointestinal Bleeding, Ulceration. and Perforation).After observing the response to initial therapy with naproxen tablets, the dose and frequency should be adjusted to suit an individual patient's needs.Different dose strengths and formulations (i.e., tablets, suspension) of the drug are not necessarily bioequivalent. This difference should be taken into consideration when changing formulation.Although naproxen tablets, naproxen suspension, naproxen delayed-released tablets and naproxen sodium tablets all circulate in the plasma as naproxen, they have pharmacokinetic differences that may affect onset action. Onset of pain relief can begin within 1 hour in patients taking naproxen. The recommended strategy for initiating therapy is to choose a formulation and a starting dose likely to be effective for the patient and then adjust the dosage based on observation of benefit and/or adverse events. A lower dose should be considered in patients with renal or hepatic impairment or in elderly patients (see WARNINGS; Hepatotoxicity, Renal Toxicity, Hyperkalemia and PRECAUTIONS: Geriatric use).Geriatric Patients Studies indicate that although total plasma concentration of naproxen is unchanged, the unbound plasma fraction of naproxen is increased in the elderly. Caution is advised when high doses are required and some adjustment of dosage may be required in elderly patients. As with other drugs used in the elderly, it is prudent to use the lowest effective dose.Patients With Moderate to Severe Renal ImpairmentNaproxen-containing products are not recommended for use in patients with moderate to severe and severe renal impairment (creatinine clearance < 30 mUmin) (see WARNINGS: Renal Effects).Rheumatoid Arthritis, Osteoarthritis and Ankylosing SpondylitisThe recommended dose is 250 mg, 375 mg, or 500 mg twice daily.During long-term administration, the dose of naproxen may be adjusted up or down depending on the clinical response of the patient. A lower daily dose may suffice for long-term administration. The morning and evening doses do not have to be equal in size and the administration of the drug more frequently than twice daily is not necessary.In patients who tolerate lower doses well, the dose may be increased to naproxen 1500 mg/day for limited periods of up to 6 months when a higher level of anti-inflammatory/analgesic activity is required. When treating such patients with naproxen 1500 mg/day, the physician should observe sufficient increased clinical benefits to offset the potential increased risk. The morning and evening doses do not have to be equal in size and administration of the drug more frequently than twice daily does not generally make a difference in response (see CLINICAL PHARMACOLOGY).Juvenile ArthritisNaproxen Tablets may not allow for the flexible dose titration needed in pediatric patients with juvenile arthritis. A liquid formulation may be more appropriate.In pediatric patients, doses of 5 mg/kg/day produced plasma levels of naproxen similar to those seen in adults taking 500 mg of naproxen (see CLINICAL PHARMACOLOGY).The recommended total daily dose of naproxen is approximately 10 mg/kg given in 2 divided doses. One-half of the 250 mg tablet will be needed for dosing lower-weight children. Dosing with Naproxen Tablets is not appropriate for children weighing less than 25 kilograms.The recommended total daily dose of naproxen is approximately 10 mg/kg given in 2 divided doses (i.e., 5 mg/kg given twice a day). Naproxen tablets are not well suited to this dosage so use of naproxen oral suspension is recommended for this indication.Management of Pain, Primary Dysmenorrhea, and Acute Tendonitis and BursitisBecause the sodium salt of naproxen is more rapidly absorbed, naproxen sodium is recommended for the management of acute painful conditions when prompt onset of pain relief is desired. Naproxen may also be used. The recommended starting dose of naproxen is 500 mg, followed by 500 mg every 12 hours or 250 mg every 6 to 8 hours as required. The initial total daily dose should not exceed 1250 mg of naproxen.Acute GoutThe recommended starting dose is 750 mg of naproxen followed by 250 mg every 8 hours until the attack has subsided.
HOW SUPPLIEDNaproxen Tablets250 mg TabletsWhite to off-white, round shaped tablet with "138" debossed on one side and scored on the other side.Available in:Bottles of 100 NDC 49483-619-01Bottles of 500 NDC 49483-619-50375 mg Tablets White to off-white, oval shaped tablet with "139" debossed on one side and plain on other side.Available in:Bottles of 100 NDC 49483-617-01Bottles of 500 NDC 49483-617-50500 mg Tablets White to off-white, capsule-shaped tablets with "140" debossed on one side and scored on the other side.Available in:Bottles of 100 NDC 49483-618-01Bottles of 500 NDC 49483-618-50Storage Store at 20°-25° C (68°-77° F); excursions permitted to 15°-30° C (59°-86° F). [See USP Controllec Room Temperature.]Dispense in a light-resistant container as defined in USP.Manufactured for:Time-Cap Labs, Inc.7 Michael AvenueFarmingdale, NY 11735, USAManufactured by:Marksans Pharma Ltd. Plot No. L-82, L-83, Verna Ind. Estate,Verna, Goa-403 722, IndiaRev. 2/17
- Medication Guide for Non-steroidal Anti-Inflammatory Drugs (NSAIDs)What is the most important information I should know about medicines called Non-Steroidal Anti-Inflammatory Drugs (NSAIDs)?NSAIDs can cause serious side effects, including: •
- Increased risk of a heart attack or stroke that can lead to death. This risk may happen early in treatment and may increase:
- O with increasing doses of NSAIDswith longer use of NSAIDsDo not take NSAIDs right before or after a heart surgery called a "coronary artery bypass graft (CABG)." Avoid taking NSAIDs after a recent heart attack, unless your healthcare provider tells you to. You may have an increased risk of another heart attack if you take NSAIDs after a recent heart attack. •
- Increased risk of bleeding, ulcers, and tears (perforation) of the esophagus (tube leading from the mouth to the stomach), stomach and intestines: any time during usewithout warning symptomsthat may cause deathThe risk of getting an ulcer or bleeding increases with: past history of stomach ulcers, or stomach or intestinal bleeding with use of NSAIDstaking medicines called "corticosteroids", "anticoagulants", "SSRls", or "SNRIs"increasing doses of NSAIDslonger use of NSAIDssmokingdrinking alcohol older agepoor healthadvanced liver diseasebleeding problemsNSAIDs should only be used: exactly as prescribedat the lowest dose possible for your treatmentfor the shortest time neededWhat are NSAIDs? NSAIDs are used to treat pain and redness, swelling, and heat (inflammation) from medical conditions such as different types of arthritis, menstrual cramps, and other types of short-term pain.Who should not take NSAIDs? Do not take NSAIDs: • if you had an asthma attack, hives, or other allergic reaction with aspirin or any other NSAIDs. • right before or after heart bypass surgery.Before taking NSAIDs, tell your healthcare provider about all of your medical conditions, including if you: • have liver or kidney problems • have high blood pressure • have asthma • are prognant or plan to become pregnant. Talk to your healthcare provider it you are considering taking NSAIDs during pregnancy. Y
- Ou should not take NSAIDs after 29 weeks of pregnancy. • are breastfeeding or plan to breastfeed.Tell your healthcare provider about all of the medicines you take, including prescription or over-the-counter medicines, vitamins or herbal supplements.NSAIDs and some other medicines can interact with each other and cause serious side effects. Do not start taking any new medicine without talking to your healthcare provider first.What are the possible side effects of NSAIDs? NSAIDs can cause serious side effects, including: See "What Is the most important Information I should know about medicines called Nonsteroidal Anti-inflammatory Drugs (NSAIDs)? • new or worse high blood pressure • heart failure • liver problems including liver failure • kidney problems including kidney failure • low red blood cells (anemia) • life-threatening skin reactions • life-threatening allergic reactions •
- Other side effects of NSAIDs include: stomach pain, constipation, diarrhea, gas, heartburn, nausea, vomiting, and dizziness.
- Get emergency help right away if you have any of the following symptoms: • shortness of breath or trouble breathing • chest pain • weakness in one part or side of your body • slurred speech • swelling of the face or throatStop taking your NSAID and call your healthcare provider right away if you get any of the following symptoms: • nausea • vomit blood • more tired or weaker than usual • diarrhea • itching • there is blood in your bowel movement or it is black and sticky like tar • your skin or eyes look yellow • indigestion or stomach pain • flu-like symptoms • unusual weight gain • skin rash or blisters with fever • swelling of the arms and legs, hands and feetIf you take too much of your NSAID, call your healthcare provider or get medical help right away. These are not all the possible side effects of NSAIDs. For more information, ask your I healthcare provider or pharmacist about NSAIDs. Call your doctor for medical advice about side effects. You may report side effects to Time-Cap Labs, Inc. at 1-877-376-4271 and/or to FDA at 1-800-FDA-1088.Other information about NSAIDs • Aspirin is an NSAID medicine but it does not increase the chance of a heart attack. Aspirin can cause bleeding in the brain, stomach, and intestines. Aspirin can also cause ulcers in the stomach and intestines. • Some NSAIDs are sold in lower doses without a prescription (over-the-counter). Talk to your healthcare provider before using over-the-counter NSAIDs for more than 10 days.General information about the safe and effective use of NSAIDs Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use NSAIDs for a condition for which it was not prescribed. Do not give NSAIDs to other people, even if they have the same symptoms that you have. It may harm them. If you would like more information about NSAIDs, talk with your healthcare provider. You can ask your pharmacist or healthcare provider for information about NSAIDs that is written for health professionals.
- This Medication Guide has been approved by the U.S. Food and Drug Administration.Manufactured for:Time-Cap Labs, Inc. 7 Michael AvenueFarmingdale,New York 11735, USAManufactured by:Marksans Pharma Ltd. Plot No.L-82, L-83, Verna Indl. Estate,Verna, Goa-403 722, IndiaRev. 2/17
* Please review the disclaimer below.