Ibuprofen and Famotidine

INDICATIONS AND USAGE Ibuprofen and famotidine tablets, a combination of the NSAID ibuprofen and the histamine H 2 -receptor antagonist famotidine, is indicated for the relief of signs and symptoms of rheumatoid arthritis and osteoarthritis and to decrease the risk of developing upper gastrointestinal ulcers, which in the clinical trials was defined as a gastric and/or duodenal ulcer, in patients who are taking ibuprofen for those indications. The clinical trials primarily enrolled patients less than 65 years of age without a prior history of gastrointestinal ulcer. Controlled trials do not extend beyond 6 months [see Clinical Studies ( 14 ), Use in Specific Populations ( 8.5 )] . Ibuprofen and famotidine tablets, a combination of a nonsteroidal anti-inflammatory drug (NSAID) ibuprofen and the histamine H 2 -receptor antagonist famotidine, is indicated for the relief of signs and symptoms of rheumatoid arthritis and osteoarthritis and to decrease the risk of developing upper gastrointestinal ulcers, which in the clinical trials was defined as a gastric and/or duodenal ulcer, in patients who are taking ibuprofen for those indications. The clinical trials primarily enrolled patients less than 65 years of age without a prior history of gastrointestinal ulcer. Controlled trials do not extend beyond 6 months. ( 1 )

DOSAGE AND ADMINISTRATION Carefully consider the potential benefits and risks of ibuprofen and famotidine tablets and other treatment options before deciding to use ibuprofen and famotidine tablets. Use ibuprofen at the lowest effective dosage for the shortest duration consistent with individual patient treatment goals [see Warnings and Precautions ( 5 )] . The recommended daily dose of ibuprofen and famotidine 800 mg/26.6 mg is a single tablet administered orally three times per day. Ibuprofen and famotidine tablets should be swallowed whole, and should not be cut to supply a lower dose. Do not chew, divide, or crush tablets. Patients should be instructed that if a dose is missed, it should be taken as soon possible. However, if the next scheduled dose is due, the patient should not take the missed dose, and should be instructed to take the next dose on time. Patients should be instructed not to take 2 doses at one time to make up for a missed dose. Do not substitute ibuprofen and famotidine tablet with the single-ingredient products of ibuprofen and famotidine. One Ibuprofen and famotidine tablet administered orally three times per day. ( 2 ) Use ibuprofen at the lowest effective dosage for the shortest duration consistent with individual patient treatment goals. ( 2 ) Do not substitute Ibuprofen and famotidine tablet with the single-ingredient products of ibuprofen and famotidine. ( 2 )

WARNINGS AND PRECAUTIONS • Hepatotoxicity : Inform patients of warning signs and symptoms of hepatotoxicity. Discontinue if abnormal liver tests persist or worsen or if clinical signs and symptoms of liver disease develop. (5.4) • Hypertension : Patients taking some antihypertensive medications may have impaired response to these therapies when taking NSAIDs. Monitor blood pressure. (5.5, 7) • Heart Failure and Edema : Avoid use of ibuprofen and famotidine tablets in patients with severe heart failure unless benefits are expected to outweigh risk of worsening heart failure. (5.6) • Active Bleeding : Active and clinically significant bleeding from any source can occur; discontinue ibuprofen and famotidine tablet if active bleeding occurs. (5.3) • Renal Toxicity : Monitor renal function in patients with renal or hepatic impairment, heart failure, dehydration, or hypovolemia. Avoid use of ibuprofen and famotidine tablet in patients with advanced renal disease unless benefits are expected to outweigh risk of worsening renal function. (5.7) • Anaphylactic Reactions : Seek emergency help if an anaphylactic reaction occurs. (5.8) • Exacerbation of Asthma Related to Aspirin Sensitivity : Ibuprofen and famotidine tablet is contraindicated in patients with aspirin-sensitive asthma. Monitor patients with preexisting asthma (without aspirin-sensitivity). (5.10) • Serious Skin Reactions : Discontinue ibuprofen and famotidine tablet at first appearance of skin rash or other signs of hypersensitivity (5.11). • Drug Reaction with Eosinophilia and Systematic Symptoms (DRESS) :Discontinue and evaluate clinically (5.12). • Fetal Toxicity : Limit use of NSAIDs, including ibuprofen and famotidine tablet, between about 20 to 30 weeks in pregnancy due to the risk of oligohydramnios/fetal renal dysfunction. Avoid use of NSAIDs in women at about 30 weeks gestation and later in pregnancy due to the risks of oligohydramnios/fetal renal dysfunction and premature closure of the fetal ductus arteriosus (5.13, 8.1) • Hematologic Toxicity : Monitor hemoglobin or hematocrit in patient with any signs or symptoms of anemia. (5.14) 5.1 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, 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 ibuprofen, 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 ibuprofen and famotidine tablet in patients with a recent MI unless the benefits are expected to outweigh the risk of recurrent CV thrombotic events. If ibuprofen and famotidine tablet is used in patients with a recent MI, monitor patients for signs of cardiac ischemia. 5.2 Gastrointestinal Bleeding, Ulceration, and Perforation NSAIDs, including ibuprofen, 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. NSAIDs should be given with care to patients with a history of inflammatory bowel disease (ulcerative colitis, Crohn’s disease) as their condition may be exacerbated. 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 ibuprofen and famotidine tablet 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)] . 5.3 Active Bleeding When active and clinically significant bleeding from any source occurs in patients receiving ibuprofen and famotidine tablet, the treatment should be withdrawn. Patients with initial hemoglobin values of 10 g or less who are to receive long-term therapy should have hemoglobin values determined periodically. 5.4 Hepato

CONTRAINDICATIONS Ibuprofen and famotidine tablets are contraindicated in the following patients: Known hypersensitivity (e.g., anaphylactic reactions and serious skin reactions) to ibuprofen or famotidine or any components of the drug product [see Warnings and Precautions ( 5.8 , 5.11 )] . 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 ( 5.8 , 5.10 )] . In the setting of coronary artery bypass graft (CABG) surgery [see Warnings and Precautions ( 5.1 )] . Ibuprofen and famotidine tablets should not be administered to patients with a history of hypersensitivity to other H 2 -receptor antagonists. Cross sensitivity with other H 2 -receptor antagonists has been observed. Known hypersensitivity to ibuprofen or famotidine or any components of the drug product. ( 4 ) History of asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs. ( 4 ) In the setting of CABG surgery. ( 4 ) Known hypersensitivity to other H 2 -receptor antagonists. ( 4 )

DRUG INTERACTIONS See Table 3 for clinically significant drug interactions with ibuprofen. Table 3: Clinically Significant Drug Interactions with Ibuprofen and Famotidine Drugs That Interfere with Hemostasis Clinical Impact: Ibuprofen and anticoagulants such as warfarin have a synergistic effect on bleeding. The concomitant use of ibuprofen and anticoagulants have 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 ibuprofen and famotidine tablet 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 and Precautions ( 5.16 ) ] . Aspirin Clinical Impact: Pharmacodynamic (PD) studies have demonstrated interference with the antiplatelet activity of aspirin when ibuprofen 400 mg, given three times daily, is administered with enteric-coated low-dose aspirin. The interaction exists even following a once-daily regimen of ibuprofen 400 mg, particularly when ibuprofen is dosed prior to aspirin. The interaction is alleviated if immediate-release low-dose aspirin is dosed at least 2 hours prior to a once-daily regimen of ibuprofen; however, this finding cannot be extended to enteric-coated low-dose aspirin [see Clinical Pharmacology ( 12.2 )]. 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 and Precautions ( 5.2 )] . Intervention: Because there may be an increased risk of cardiovascular events due to the interference of ibuprofen with the antiplatelet effect of aspirin, for patients taking low-dose aspirin for cardioprotection who require analgesics, consider use of an NSAID that does not interfere with the antiplatelet effect of aspirin, or non-NSAID analgesics, where appropriate. Concomitant use of ibuprofen and famotidine tablet and analgesic doses of aspirin is not generally recommended because of the increased risk of bleeding [see Warnings and Precautions ( 5.3 )] . Ibuprofen and famotidine tablet 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 (ACE) inhibitors, angiotensin receptor blockers (ARBs), or beta-blockers (including propranolol). In patients who are elderly, volume-depleted (including those on diuretic therapy), or have renal impairment, co-administration of an NSAID with ACE inhibitors or ARBs may result in deterioration of renal function, including possible acute renal failure. These effects are usually reversible . Intervention: During concomitant use of ibuprofen and famotidine tablet and ACE-inhibitors, ARBs, or beta- blockers, monitor blood pressure to ensure that the desired blood pressure is obtained. During concomitant use of ibuprofen and famotidine tablet 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 and Precautions ( 5.7 )] . 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 ibuprofen and famotidine tablet with diuretics, observe patients for signs of worsening renal function, in addition to assuring diuretic efficacy including antihypertensive effects [see Warnings and Precautions ( 5.7 )] . Digoxin Clinical Impact: The concomitant use of ibuprofen with digoxin has been reported to increase the serum concentration and prolong the half-life of digoxin. Intervention: During concomitant use of ibuprofen and famotidine tablet and digoxin, monitor serum digoxin levels. Lithium Clinical Impact: NSAIDs have produced elevations of 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 ibuprofen and famotidine tablet and lithium, monitor patients for signs of lithium toxicity. Methotrexate Clinical 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 ibuprofen and famotidine tablet and methotrexate, monitor patients for methotrexate toxicity. Cyclosporine Clinical Impact: Concomitant use of ibuprofen and cyclosporine may increase cyclosporine’s nephrotoxicity. Intervention: During concomitant use of ibuprofen and famotidine tablet and cyclosporine, monitor patients for signs of worsening renal function. NSAIDs and Salicylates Clinical Impact: Concomitant use of ibuprofen with other NSAIDs or salicylates (e.g., diflunisal, salsalate) increases the risk of GI toxicity, with little or no increase in efficacy [see Warnings and Precautions ( 5.2 )] . Intervention: The concomitant use of ibuprofen and famotidine tablet with other NSAIDs or salicylates is not recommended. Pemetrexed Clinical Impact: Concomitant use of ibuprofen and pemetrexed may increase the risk of pemetrexed-associated myelosuppression, renal, and GI toxicity (see the pemetrexed prescribing information). Intervention: During concomitant use of ibuprofen and famotidine tablet and pemetrexed, in patients with renal impairment whose creatinine clearance ranges from 45 to 79 mL/min, 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 permetrexed 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. Drugs Dependent on Gastric pH for Absorption Clinical Impact Because famotidine lowers intra-gastric acidity, this may result in reduced absorption and loss of efficacy of concomitant drugs. Intervention Concomitant administration of ibuprofen and famotidine tablet is not recommended with dasatinib, delavirdine mesylate, cefditoren, and fosamprenavir. For administration instructions of other drugs whose absorption is dependent on gastric pH, refer to their prescribing information (e.g., atazanavir, erlotinib, ketoconazole, itraconazole, nilotinib, ledipasvir/sofosbuvir, and rilpivirine). Tizanidine (CYP1A2 Substrate) Clinical Impact Famotidine is considered a weak CYP1A2 inhibitor and may lead to substantial increases in blood concentrations of tizanidine, a CYP1A2 substrate. Intervention Avoid concomitant use with ibuprofen and famotidine tablet. If concomitant use is necessary, monitor for hypotension, bradycardia or excessive drowsiness. Refer to the full prescribing information for tizanidine. See full prescribing information for a list of clinically important drug interactions. ( 7

ADVERSE REACTIONS The following serious 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 ( 5.4 )] Hypertension [see Warnings and Precautions ( 5.5 )] Heart Failure and Edema [see Warnings and Precautions ( 5.6 )] Renal Toxicity and Hyperkalemia [see Warnings and Precautions ( 5.7 )] Anaphylactic Reactions [see Warnings and Precautions ( 5.8 )] Seizures [see Warnings and Precautions ( 5.9 )] Serious Skin Reactions [see Warnings and Precautions ( 5.11 )] Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) [see Warnings and Precautions ( 5.12 )] Fetal Toxicity [see Warnings and Precautions ( 5.13 )] Hematologic Toxicity [see Warnings and Precautions ( 5.14 )] Aseptic Meningitis [see Warnings and Precautions ( 5.18 )] Ophthalmological Effects [see Warnings and Precautions ( 5.19 )] Most common adverse reactions (≥ 1% and greater than ibuprofen alone) are nausea, diarrhea, constipation, upper abdominal pain and headache. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Viona Pharmaceuticals Inc. at 1-888-304-5011 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. The safety of ibuprofen and famotidine tablets was evaluated in 1,022 patients in controlled clinical studies, including 508 patients treated for at least 6 months and 107 patients treated for approximately 1 year. Patients treated with ibuprofen and famotidine tablets ranged in age from 39 years to 80 years (median age 55 years), with 67% female, 79% Caucasian, 18% African-American and 3% other races. Two randomized, active-controlled clinical studies (Study 301 and Study 303) were conducted for the reduction of the risk of development of ibuprofen-associated, upper gastrointestinal ulcers in patients who required use of ibuprofen, which included 1,022 patients on ibuprofen and famotidine tablets and 511 patients on ibuprofen alone. Approximately 15% of patients were on low-dose aspirin. Patients were assigned randomly, in a 2:1 ratio, to treatment with either ibuprofen and famotidine tablets or ibuprofen 800 mg three times a day for 24 consecutive weeks. Three serious cases of acute renal failure were observed in patients treated with ibuprofen and famotidine tablets in the two controlled clinical trials. All three patients recovered to baseline levels after discontinuation of ibuprofen and famotidine tablets. Additionally, increases in serum creatinine were observed in both treatment arms in the two clinical studies. Many of these patients were taking concomitant diuretics and/or angiotensin-converting enzyme inhibitors or angiotensin receptor blockers. There were patients with a normal baseline serum creatinine level who developed abnormal values in the controlled trials as presented in Table 1. Table 1 Shift Table of Serum Creatinine, Normal ** to Abnormal *** in Controlled Studies * At any point after baseline level ** serum creatinine normal range is 0.5 mg/dL to 1.4 mg/dL or 44 micromol/L to 124 micromol/L *** serum creatinine > 1.4 mg/dL Study 301 Study 303 Baseline Post-Baseline * Ibuprofen and Famotidine Tablets N=414 % (n) Ibuprofen N=207 % (n) Ibuprofen and Famotidine Tablets N=598 % (n) Ibuprofen N=296 % (n) Normal ** Abnormal *** 4% (17) 2% (4) 2% (15) 4% (12) Most Commonly Reported Adverse Reactions The most common adverse reactions (≥ 2%), from pooled data from the two controlled studies are presented in Table 2. Table 2 Incidence of Adverse Reactions in Controlled Studies Ibuprofen and Famotidine Tablets N=1,022 Ibuprofen N=511 % % Blood and lymphatic system disorders Anemia 2 1 Gastrointestinal disorders Nausea 6 5 Dyspepsia 5 8 Diarrhea 5 4 Constipation 4 4 Abdominal pain upper 3 3 Gastroesophageal reflux disease 2 3 Vomiting 2 2 Stomach discomfort 2 2 Abdominal pain 2 2 General disorders and administration site conditions Edema peripheral 2 2 Infections and infestations Upper respiratory tract infection 4 4 Nasopharyngitis 2 3 Sinusitis 2 3 Bronchitis 2 1 Urinary tract infection 2 2 Influenza 2 2 Musculoskeletal and connective tissue disorders Arthralgia 1 2 Back pain 2 1 Nervous system disorders Headache 3 3 Respiratory, thoracic and mediastinal disorders Cough 2 2 Pharyngolaryngeal pain 2 1 Vascular disorders Hypertension 3 2 In controlled clinical studies, the discontinuation rate due to adverse events for patients receiving ibuprofen and famotidine tablets and ibuprofen alone were similar. The most common adverse reactions leading to discontinuation from ibuprofen and famotidine tablet therapy were nausea (0.9%) and upper abdominal pain (0.9%). There were no differences in types of related adverse reactions seen during maintenance treatment up to 12 months compared to short-term treatment. 6.2 Postmarketing Experience Ibuprofen The following adverse reactions have been identified during post-approval use of ibuprofen. 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. These reports are listed below by body system: Cardiac disorders: myocardial infarction Gastrointestinal disorders: nausea, vomiting, diarrhea, abdominal pain General disorders and administration site conditions: pyrexia, pain, fatigue, asthenia, chest pain, drug ineffective, edema peripheral Skin and Appendages: exfoliative dermatitis, Stevens-Johnson Syndrome (SJS), toxic epidermal necrolysis (TEN), and fixed drug eruption (FDE) Musculoskeletal and connective tissue disorders: arthralgia Nervous system disorders: headache, dizziness Psychiatric disorders: depression, anxiety Renal and urinary disorders: renal failure acute Respiratory, thoracic, and mediastinal disorders: dyspnea Vascular disorders: hypertension Famotidine The following adverse reactions have been identified during post-approval use of famotidine. 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. These reports are listed below by body system: Blood and lymphatic system disorders: anemia, thrombocytopenia Gastrointestinal disorders: nausea, diarrhea, vomiting, abdominal pain General disorders and administration site conditions: pyrexia, condition aggravated, asthenia, drug ineffective, chest pain, fatigue, pain, edema peripheral Hepatobiliary disorders: hepatic function abnormal Infections and infestations: pneumonia, sepsis Investigations: platelet count decreased, aspartate aminotransferase increased, alanine aminotransferase increased, hemoglobin decreased Metabolism and nutrition disorders: decreased appetite Nervous system disorders: dizziness, headache Respiratory, thoracic and mediastinal disorders: dyspnea Vascular disorders: hypotension

CLINICAL PHARMACOLOGY 12.1 Mechanism of Action Ibuprofen and famotidine tablet is a fixed-combination tablet of ibuprofen and famotidine. The ibuprofen component has analgesic, anti-inflammatory, and antipyretic properties. The mechanism of action of the ibuprofen component of ibuprofen and famotidine tablet, like that of other NSAIDs, is not completely understood but involves inhibition of cyclooxygenase (COX-1 and COX-2). Ibuprofen is a potent inhibitor of prostaglandin synthesis in vitro . Ibuprofen 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 ibuprofen is an inhibitor of prostaglandin synthesis, its mode of action may be due to an increase of prostaglandins in peripheral tissues. Famotidine is a competitive inhibitor of histamine H 2 -receptors. The primary clinically important pharmacologic activity of famotidine is inhibition of gastric secretion. Both the acid concentration and volume of gastric secretion are suppressed by famotidine, while changes in pepsin secretion are proportional to volume output. Systemic effects of famotidine in the CNS, cardiovascular, respiratory, or endocrine systems were not noted in clinical pharmacology studies. Also, no antiandrogenic effects were noted. Serum hormone levels, including prolactin, cortisol, thyroxine (T 4 ), and testosterone, were not altered after treatment with famotidine. 12.2 Pharmacodynamics In a healthy volunteer study, ibuprofen 400 mg given once daily, administered 2 hours prior to immediate-release aspirin (81 mg) for 6 days, showed an interaction with the antiplatelet activity of aspirin as measured by % serum thromboxane B2 (TxB2) inhibition at 24 hours following the day-6 aspirin dose [53%]. An interaction was still observed, but minimized, when ibuprofen 400 mg given once-daily was administered as early as 8 hours prior to the immediate-release aspirin dose [90.7%]. However, there was no interaction with the antiplatelet activity of aspirin when ibuprofen 400 mg, given once daily, was administered 2 hours after (but not concomitantly, 15 min, or 30 min after) the immediate-release aspirin dose [99.2%]. In another study, where immediate-release aspirin 81 mg was administered once daily with ibuprofen 400 mg given three times daily (1, 7, and 13 hours post-aspirin dose) for 10 consecutive days, the mean % serum thromboxane B2 (TxB2) inhibition suggested no interaction with the antiplatelet activity of aspirin [98.3%]. However, there were individual subjects with serum TxB2 inhibition below 95%, with the lowest being 90.2%. When a similarly designed study was conducted with enteric-coated aspirin, where healthy subjects were administered enteric-coated aspirin 81 mg once daily for 6 days and ibuprofen 400 mg three times daily (2, 7, and 12 h post-aspirin dose) for 6 days, there was an interaction with the antiplatelet activity at 24 hours following the day-6 aspirin dose [67%] [see Drug Interactions (7)]. 12.3 Pharmacokinetics Absorption Ibuprofen and famotidine are rapidly absorbed after a single dose administration of ibuprofen and famotidine tablet. Mean C max values for ibuprofen are 45 µg/mL and are reached approximately 1.9 hours after oral administration of ibuprofen and famotidine tablet. The C max and AUC 0-24hours values for the 800 mg of ibuprofen contained in a ibuprofen and famotidine tablet are bioequivalent to the values for 800 mg of ibuprofen administered alone. C max values for famotidine were 61 ng/mL and are reached at approximately 2 hours after oral administration of ibuprofen and famotidine tablet. A high-fat meal reduced famotidine C max and AUC by approximately by 15% and 11%, respectively, and reduced ibuprofen AUC by approximately 14% but did not change C max . Food delayed famotidine T max and ibuprofen T max by approximately 1 hour and 0.2 hour, respectively. Distribution Ibuprofen is extensively bound to plasma proteins. Fifteen to 20% of famotidine in plasma is protein bound. Elimination Metabolism The only metabolite of famotidine identified in man is the S-oxide. Excretion Ibuprofen is eliminated from the systemic circulation with a mean half-life (t 1/2 ) value of 2 hours following administration of a single dose of ibuprofen and famotidine tablet. Ibuprofen is rapidly metabolized and eliminated in the urine. The excretion of ibuprofen is virtually complete 24 hours after the last dose. Studies have shown that following ingestion of the drug, 45% to 79% of the dose was recovered in the urine within 24 hours as metabolite A (25%), (+)-2-[p-(2-hydroxymethyl-propyl) phenyl] propionic acid and metabolite B (37%), (+)­-2-[p-(2-carboxypropyl)phenyl] propionic acid; the percentages of free and conjugated ibuprofen were approximately 1% and 14%, respectively. Famotidine is eliminated from the systemic circulation with a mean t 1/2 value of 4 hours following administration of a single dose of ibuprofen and famotidine tablet. Famotidine is eliminated by renal (65-70%) and metabolic (30-35%) routes. Renal clearance is 250-450 mL/min, indicating some tubular excretion. Twenty-five to 30% of an oral dose and 65-70% of an intravenous dose are recovered in the urine as unchanged compound. Specific Populations Pediatric s: The pharmacokinetics of ibuprofen or famotidine after administration of ibuprofen and famotidine tablet have not been evaluated in a pediatric population considering the doses of ibuprofen and famotidine in ibuprofen and famotidine tablet are targeted for use in an adult population. Hepatic impairment : The effects of hepatic impairment on the pharmacokinetics of ibuprofen or famotidine after administration of ibuprofen and famotidine tablet have not been evaluated [see Warnings and Precautions (5.4)] . Renal impairment : There is a close relationship between creatinine clearance values and the elimination t 1/2 of famotidine, which is a component of ibuprofen and famotidine tablets. In patients with creatinine clearance <50 mL/min, the elimination t 1/2 of famotidine is increased and may exceed 20 hours. Therefore, ibuprofen and famotidine tablet is not recommended in patients with creatinine clearance < 50 mL/min [see Warnings and Precautions (5.7)] . Drug Interaction Studies Co-administration of ibuprofen (800 mg) and famotidine (40 mg) increased ibuprofen C max by 15.6% but did not affect its AUC, and increased famotidine AUC and C max by 16% and 22%, respectively. Aspirin : 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 3 for clinically significant drug interactions of NSAIDs with aspirin [see Drug Interaction (7)] . Probenecid, an inhibitor of Organic Aniton Transporter 1 (OAT1) and OAT3 In vitro studies indicate that famotidine is a substrate for OAT1 and OAT3. Following coadministration of probenecid (1500 mg) with a single oral 20 mg dose of famotidine in 8 healthy subjects, the serum AUC 0-10h of famotidine increased from 424 to 768 ng×hr/mL and the maximum serum concentration (C max ) increased from 73 to 113 ng/mL. Renal clearance, urinary excretion rate and amount of famotidine excreted unchanged in urine were decreased. The clinical relevance of this interaction is unknown. Metformin : Famotidine is a selective inhibitor of multidrug and toxin extrusion transporter 1 (MATE-1) but no clinical significant interaction with metformin, a substrate for MATE-1, was observed.