Fenofibrate

12.1 Mechanism of Action The active moiety of fenofibrate is fenofibric acid. The pharmacological effects of fenofibric acid in both animals and humans have been extensively studied through oral administration of fenofibrate. The lipid-modifying effects of fenofibric acid seen in clinical practice have been explained in vivo in transgenic mice and in vitro in human hepatocyte cultures by the activation of peroxisome proliferator activated receptor α (PPARα). Through this mechanism, fenofibrate increases lipolysis and elimination of triglyceride-rich particles from plasma by activating lipoprotein lipase and reducing production of apoprotein C-III (an inhibitor of lipoprotein lipase activity). The resulting decrease in TG produces an alteration in the size and composition of LDL from small, dense particles (which are thought to be atherogenic due to their susceptibility to oxidation), to large buoyant particles. These larger particles have a greater affinity for cholesterol receptors and are catabolized rapidly. Activation of PPARα also induces an increase in the synthesis of apolipoproteins A-I, A-II and HDL-cholesterol. Fenofibrate also reduces serum uric acid levels in hyperuricemic and normal individuals by increasing the urinary excretion of uric acid.

1 INDICATIONS AND USAGE Fenofibrate tablet USP is a peroxisome proliferator-activated receptor (PPAR) alpha agonist indicated as an adjunct to diet: To reduce elevated LDL-C, Total-C, TG and Apo B, and to increase HDL-C in adult patients with primary hypercholesterolemia or mixed dyslipidemia ( 1.1 ). For treatment of adult patients with severe hypertriglyceridemia ( 1.2 ). Limitations of Use: Fenofibrate was not shown to reduce coronary heart disease morbidity and mortality in patients with type 2 diabetes mellitus ( 5.1 ). 1.1 Primary Hypercholesterolemia or Mixed Dyslipidemia Fenofibrate tablet USP is indicated as adjunctive therapy to diet to reduce elevated low-density lipoprotein cholesterol (LDL-C), total cholesterol (Total-C), Triglycerides and apolipoprotein B (Apo B), and to increase high-density lipoprotein cholesterol (HDL-C) in adult patients with primary hypercholesterolemia or mixed dyslipidemia. 1.2 Severe Hypertriglyceridemia Fenofibrate tablet USP is also indicated as adjunctive therapy to diet for treatment of adult patients with severe hypertriglyceridemia. Improving glycemic control in diabetic patients showing fasting chylomicronemia will usually obviate the need for pharmacologic intervention. Markedly elevated levels of serum triglycerides (e.g. > 2,000 mg/dL) may increase the risk of developing pancreatitis. The effect of fenofibrate therapy on reducing this risk has not been adequately studied. 1.3 Important Limitations of Use Fenofibrate at a dose equivalent to 160 mg of fenofibrate tablet USP was not shown to reduce coronary heart disease morbidity and mortality in a large, randomized controlled trial of patients with type 2 diabetes mellitus [see WARNINGS AND PRECAUTIONS ( 5.1 )] .

2 DOSAGE AND ADMINISTRATION Primary hypercholesterolemia or mixed dyslipidemia: Initial dose of 160 mg once daily ( 2.2 ). Severe hypertriglyceridemia: Initial dose of 54 to 160 mg once daily. Maximum dose is 160 mg ( 2.3 ). Renally impaired patients: Initial dose of 54 mg once daily ( 2.4 ). Geriatric patients: Select the dose on the basis of renal function ( 2.5 ). Should be given with meals ( 2.1 ). 2.1 General Considerations Patients should be placed on an appropriate lipid-lowering diet before receiving fenofibrate tablet USP, and should continue this diet during treatment with fenofibrate tablet USP. Fenofibrate tablets USP should be given with meals, thereby optimizing the bioavailability of the medication. The initial treatment for dyslipidemia is dietary therapy specific for the type of lipoprotein abnormality. Excess body weight and excess alcoholic intake may be important factors in hypertriglyceridemia and should be addressed prior to any drug therapy. Physical exercise can be an important ancillary measure. Diseases contributory to hyperlipidemia, such as hypothyroidism or diabetes mellitus should be looked for and adequately treated. Estrogen therapy, thiazide diuretics and beta-blockers, are sometimes associated with massive rises in plasma triglycerides, especially in subjects with familial hypertriglyceridemia. In such cases, discontinuation of the specific etiologic agent may obviate the need for specific drug therapy of hypertriglyceridemia. Lipid levels should be monitored periodically and consideration should be given to reducing the dosage of fenofibrate tablet USP if lipid levels fall significantly below the targeted range. Therapy should be withdrawn in patients who do not have an adequate response after two months of treatment with the maximum recommended dose of 160 mg once daily. 2.2 Primary Hypercholesterolemia or Mixed Dyslipidemia The initial dose of fenofibrate tablet USP is 160 mg once daily. 2.3 Severe Hypertriglyceridemia The initial dose is 54 to 160 mg per day. Dosage should be individualized according to patient response, and should be adjusted if necessary following repeat lipid determinations at 4 to 8 week intervals. The maximum dose is 160 mg once daily. 2.4 Impaired Renal Function Treatment with fenofibrate tablet USP should be initiated at a dose of 54 mg per day in patients having mild to moderately impaired renal function, and increased only after evaluation of the effects on renal function and lipid levels at this dose. The use of fenofibrate tablet USP should be avoided in patients with severe renal impairment [see USE IN SPECIFIC POPULATIONS ( 8.6 ) and CLINICAL PHARMACOLOGY ( 12.3 )]. 2.5 Geriatric Patients Dose selection for the elderly should be made on the basis of renal function [see USE IN SPECIFIC POPULATIONS ( 8.5 )] .

6 ADVERSE REACTIONS The following serious adverse reactions are described below and elsewhere in the labeling: •Mortality and coronary heart disease morbidity [see WARNINGS AND PRECAUTIONS ( 5.1 )] •Hepatoxicity [see WARNINGS AND PRECAUTIONS ( 5.2 )] •Pancreatitis [see WARNINGS AND PRECAUTIONS ( 5.7 )] •Hypersensitivity reactions [see WARNINGS AND PRECAUTIONS ( 5.9 )] • Venothromboembolic disease [see WARNINGS AND PRECAUTIONS ( 5.10 )] Adverse reactions > 2% and at least 1% greater than placebo: Abnormal liver tests, increased AST, increased ALT, increased CPK, and rhinitis ( 6 ). To report SUSPECTED ADVERSE REACTIONS, contact Lupin Pharmaceuticals, Inc. at 1-800-399-2561 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch 6.1 Clinical Trials Experience Because clinical studies are conducted under widely varying conditions, adverse reaction rates observed in the clinical studies of a drug cannot be directly compared to rates in the clinical studies of another drug and may not reflect the rates observed in practice. Adverse events reported by 2% or more of patients treated with fenofibrate (and greater than placebo) during the double-blind, placebo-controlled trials, regardless of causality, are listed in Table 1 below. Adverse events led to discontinuation of treatment in 5.0% of patients treated with fenofibrate and in 3.0% treated with placebo. Increases in liver function tests were the most frequent events, causing discontinuation of fenofibrate treatment in 1.6% of patients in double- blind trials. Table 1. Adverse Reactions Reported by 2% or More of Patients Treated with Fenofibrate and Greater than Placebo During the Double-Blind, Placebo-Controlled Trials 1 Significantly different from Placebo. BODY SYSTEM Fenofibrate Dosage equivalent to 160 mg fenofibrate. Placebo Adverse Reaction ( N = 439 ) ( N = 365 ) BODY AS A WHOLE Abdominal Pain 4.6% 4.4% Back Pain 3.4% 2.5% Headache 3.2% 2.7% DIGESTIVE Nausea 2.3% 1.9% Constipation 2.1% 1.4% METABOLIC AND NUTRITIONAL DISORDERS Abnormal Liver Function Tests 7.5% 1 1.4% Increased ALT 3.0% 1.6% Increased CPK 3.0% 1.4% Increased AST 3.4% 1 0.5% RESPIRATORY Respiratory Disorder 6.2% 5.5% Rhinitis 2.3% 1.1% Urticaria was seen in 1.1% vs. 0%, and rash in 1.4% vs. 0.8% of fenofibrate and placebo patients respectively in controlled trials. Increases in Liver Enzymes In a pooled analysis of 10 placebo-controlled trials, increases to > 3 times the upper limit of normal in ALT occurred in 5.3% of patients taking fenofibrate at doses equivalent to 107 mg to 160 mg fenofibrate daily versus 1.1% of patients treated with placebo. In an 8-week study, the incidence of ALT or AST elevations ≥ 3 times the upper limit of normal was 13% in patients receiving dosages equivalent to 107 mg to 160 mg fenofibrate daily and was 0% in those receiving dosages equivalent to 54 mg or less fenofibrate daily or placebo. 6.2 Postmarketing Experience The following adverse reactions have been identified during postapproval use of fenofibrate. 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: myalgia, rhabdomyolysis, pancreatitis, acute renal failure, muscle spasm, hepatitis, cirrhosis, increased total bilirubin, anemia, arthralgia, decreases in hemoglobin, decreases in hematocrit, white blood cell decreases, asthenia, severely depressed HDL-cholesterol levels, and interstitial lung disease. Photosensitivity reactions have occurred days to months after initiation; in some of these cases, patients reported a prior photosensitivity reaction to ketoprofen.

7 DRUG INTERACTIONS Coumarin anticoagulants: ( 7.1 ). Immunosuppressants: ( 7.2 ). Bile acid resins: ( 7.3 ). 7.1 Coumarin Anticoagulants Potentiation of coumarin-type anticoagulant effects has been observed with prolongation of the PT/INR. Caution should be exercised when coumarin anticoagulants are given in conjunction with fenofibrate. The dosage of the anticoagulants should be reduced to maintain the PT/INR at the desired level to prevent bleeding complications. Frequent PT/INR determinations are advisable until it has been definitely determined that the PT/INR has stabilized [see WARNINGS AND PRECAUTIONS (5.6)] . 7.2 Immunosuppressants Immunosuppressants such as cyclosporine and tacrolimus can produce nephrotoxicity with decreases in creatinine clearance and rises in serum creatinine, and because renal excretion is the primary elimination route of fibrate drugs including fenofibrate, there is a risk that an interaction will lead to deterioration of renal function. The benefits and risks of using fenofibrate tablet with immunosuppressants and other potentially nephrotoxic agents should be carefully considered, and the lowest effective dose employed and renal function monitored. 7.3 Bile Acid Binding Resins Since bile acid binding resins may bind other drugs given concurrently, patients should take fenofibrate at least 1 hour before or 4 to 6 hours after a bile acid binding resin to avoid impeding its absorption. 7.4 Colchicine Cases of myopathy, including rhabdomyolysis, have been reported with fenofibrates co administered with colchicine, and caution should be exercised when prescribing fenofibrate with colchicine.