Lovastatin

INDICATIONS AND USAGE Therapy with Lovastatin Tablets USP should be a component of multiple risk factor intervention in those individuals with dyslipidemia at risk for atherosclerotic vascular disease. Lovastatin Tablets USP should be used in addition to a diet restricted in saturated fat and cholesterol as part of a treatment strategy to lower total-C and LDL-C to target levels when the response to diet and other nonpharmacological measures alone has been inadequate to reduce risk. Primary Prevention of Coronary Heart Disease In individuals without symptomatic cardiovascular disease, average to moderately elevated total-C and LDL-C, and below average HDL-C, Lovastatin Tablets USP are indicated to reduce the risk of: - Myocardial infarction - Unstable angina - Coronary revascularization procedures (See CLINICAL PHARMACOLOGY , Clinical Studies in Adults .) Coronary Heart Disease Lovastatin Tablets USP are indicated to slow the progression of coronary atherosclerosis in patients with coronary heart disease as part of a treatment strategy to lower total-C and LDL-C to target levels. Hypercholesterolemia Therapy with lipid-altering agents should be a component of multiple risk factor intervention in those individuals at significantly increased risk for atherosclerotic vascular disease due to hypercholesterolemia. Lovastatin Tablets USP are indicated as an adjunct to diet for the reduction of elevated total-C and LDL-C levels in patients with primary hypercholesterolemia (Types IIa and IIb 2 ), when the response to diet restricted in saturated fat and cholesterol and to other nonpharmacological measures alone has been inadequate. 2 Classification of Hyperlipoproteinemias Lipid Elevations Type Lipoproteins elevated major minor I chylomicrons TG ↑→C IIa LDL C — IIb LDL, VLDL C TG III (rare) IDL C/TG — IV VLDL TG ↑→C V (rare) chylomicrons, VLDL TG ↑→C IDL = intermediate-density lipoprotein. Adolescent Patients With Heterozygous Familial Hypercholesterolemia Lovastatin Tablets USP are indicated as an adjunct to diet to reduce total-C, LDL-C and apolipoprotein B levels in adolescent boys and girls who are at least one year post-menarche, 10 to 17 years of age, with heFH if after an adequate trial of diet therapy the following findings are present: 1. LDL-C remains > 189 mg/dL or 2. LDL-C remains > 160 mg/dL and : • there is a positive family history of premature cardiovascular disease or • two or more other CVD risk factors are present in the adolescent patient General Recommendations Prior to initiating therapy with lovastatin, secondary causes for hypercholesterolemia (e.g., poorly controlled diabetes mellitus, hypothyroidism, nephrotic syndrome, dysproteinemias, obstructive liver disease, other drug therapy, alcoholism) should be excluded, and a lipid profile performed to measure total-C, HDL-C, and TG. For patients with TG less than 400 mg/dL (< 4.5 mmol/L), LDL-C can be estimated using the following equation: LDL-C = total-C - [0.2 x (TG) + HDL-C] For TG levels > 400 mg/dL (> 4.5 mmol/L), this equation is less accurate and LDL-C concentrations should be determined by ultracentrifugation. In hypertriglyceridemic patients, LDL-C may be low or normal despite elevated total-C. In such cases, Lovastatin Tablets USP are not indicated. The National Cholesterol Education Program (NCEP) Treatment Guidelines are summarized below: NCEP Treatment Guidelines: LDL-C Goals and Cutpoints for Therapeutic Lifestyle Changes and Drug Therapy in Different Risk Categories Risk Category LDL Goal (mg/dL) LDL Level at Which to Initiate Therapeutic Lifestyle Changes (mg/dL) LDL Level at Which to Consider Drug Therapy (mg/dL) CHD CHD, coronary heart disease or CHD risk equivalents (10 year risk > 20%) < 100 ≥ 100 ≥ 130 (100 to 129: drug optional) Some authorities recommend use of LDL-lowering drugs in this category if an LDL-C level of < 100 mg/dL cannot be achieved by therapeutic lifestyle changes. Others prefer use of drugs that primarily modify triglyceri

CLINICAL PHARMACOLOGY The involvement of low-density lipoprotein cholesterol (LDL-C) in atherogenesis has been well-documented in clinical and pathological studies, as well as in many animal experiments. Epidemiological and clinical studies have established that high LDL-C and low high-density lipoprotein cholesterol (HDL-C) are both associated with coronary heart disease. However, the risk of developing coronary heart disease is continuous and graded over the range of cholesterol levels and many coronary events do occur in patients with total cholesterol (total-C) and LDL-C in the lower end of this range. Lovastatin has been shown to reduce elevated LDL-C concentrations. LDL is formed from very low-density lipoprotein (VLDL) and is catabolized predominantly by the high affinity LDL receptor. The mechanism of the LDL-lowering effect of lovastatin may involve both reduction of VLDL-C concentration, and induction of the LDL receptor, leading to reduced production and / or increased catabolism of LDL-C. Apolipoprotein B also falls during treatment with lovastatin. Lovastatin is a specific inhibitor of HMG-CoA reductase, the enzyme which catalyzes the conversion of HMG-CoA to mevalonate. The conversion of HMG-CoA to mevalonate is an early step in the biosynthetic pathway for cholesterol. Pharmacokinetics Lovastatin is a lactone which is readily hydrolyzed in vivo to the corresponding β-hydroxyacid, a strong inhibitor of HMG-CoA reductase. Inhibition of HMG-CoA reductase is the basis for an assay in pharmacokinetic studies of the β-hydroxyacid metabolites (active inhibitors) and, following base hydrolysis, active plus latent inhibitors (total inhibitors) in plasma following administration of lovastatin. Following an oral dose of 14 C-labeled lovastatin in man, 10% of the dose was excreted in urine and 83% in feces. The latter represents absorbed drug equivalents excreted in bile, as well as any unabsorbed drug. Plasma concentrations of total radioactivity (lovastatin plus 14 C-metabolites) peaked at 2 hours and declined rapidly to about 10% of peak by 24 hours postdose. Absorption of lovastatin, estimated relative to an intravenous reference dose, in each of four animal species tested, averaged about 30% of an oral dose. In animal studies, after oral dosing, lovastatin had high selectivity for the liver, where it achieved substantially higher concentrations than in non-target tissues. Lovastatin undergoes extensive first-pass extraction in the liver, its primary site of action, with subsequent excretion of drug equivalents in the bile. As a consequence of extensive hepatic extraction of lovastatin, the availability of drug to the general circulation is low and variable. In a single dose study in four hypercholesterolemic patients, it was estimated that less than 5% of an oral dose of lovastatin reaches the general circulation as active inhibitors. Following administration of lovastatin tablets the coefficient of variation, based on between-subject var

DOSAGE AND ADMINISTRATION The patient should be placed on a standard cholesterol-lowering diet before receiving lovastatin tablets and should continue on this diet during treatment with lovastatin tablets (see NCEP Treatment Guidelines for details on dietary therapy). Lovastatin tablets should be given with meals. Adult Patients The usual recommended starting dose is 20 mg once a day given with the evening meal. The recommended dosing range of lovastatin is 10 to 80 mg/day in single or two divided doses; the maximum recommended dose is 80 mg/day. Doses should be individualized according to the recommended goal of therapy (see NCEP Treatment Guidelines and CLINICAL PHARMACOLOGY ). Patients requiring reductions in LDL-C of 20% or more to achieve their goal (see INDICATIONS AND USAGE ) should be started on 20 mg/day of lovastatin tablets. A starting dose of 10 mg of lovastatin may be considered for patients requiring smaller reductions. Adjustments should be made at intervals of 4 weeks or more. Cholesterol levels should be monitored periodically and consideration should be given to reducing the dosage of lovastatin tablets if cholesterol levels fall significantly below the targeted range. Dosage in Patients Taking Danazol, Diltiazem, Dronedarone or Verapamil In patients taking danazol, diltiazem, dronedarone or verapamil concomitantly with lovastatin, therapy should begin with 10 mg of lovastatin and should not exceed 20 mg/day (see CLINICAL PHARMACOLOGY , Pharmacokinetics , WARNINGS , Myopathy/Rhabdomyolysis , PRECAUTIONS , Drug Interactions , Other Drug Interactions ). Dosage in Patients Taking Amiodarone In patients taking amiodarone concomitantly with lovastatin tablets, the dose should not exceed 40 mg/day (see WARNINGS , Myopathy/Rhabdomyolysis and PRECAUTIONS , Drug Interactions , Other Drug Interactions ). Adolescent Patients (10 to 17 Years of Age) With Heterozygous Familial Hypercholesterolemia The recommended dosing range of lovastatin is 10 to 40 mg/day; the maximum recommended dose is 40 mg/day. Doses should be individualized according to the recommended goal of therapy (see NCEP Pediatric Panel Guidelines 4 , CLINICAL PHARMACOLOGY , and INDICATIONS AND USAGE ). Patients requiring reductions in LDL-C of 20% or more to achieve their goal should be started on 20 mg/day of lovastatin tablets. A starting dose of 10 mg of lovastatin may be considered for patients requiring smaller reductions. Adjustments should be made at intervals of 4 weeks or more. 4 National Cholesterol Education Program (NCEP): Highlights of the Report of the Expert Panel on Blood Cholesterol Levels in Children and Adolescents. Pediatrics . 89(3):495-501. 1992. Concomitant Lipid-Lowering Therapy Lovastatin tablets are effective alone or when used concomitantly with bile-acid sequestrants (see WARNINGS , Myopathy/Rhabdomyolysis and PRECAUTIONS , Drug Interactions ). Dosage in Patients With Renal Insufficiency In patients with severe renal insufficiency (creatinine clearance < 30 mL/min), dosage increases above 20 mg/day should be carefully considered and, if deemed necessary, implemented cautiously (see CLINICAL PHARMACOLOGY and WARNINGS , Myopathy/Rhabdomyolysis ).

ADVERSE REACTIONS Phase III Clinical Studies In Phase III controlled clinical studies involving 613 patients treated with lovastatin, the adverse experience profile was similar to that shown below for the 8,245 patient EXCEL study (see Expanded Clinical Evaluation of Lovastatin [EXCEL] Study ). Persistent increases of serum transaminases have been noted (see WARNINGS, Liver Dysfunction ). About 11% of patients had elevations of CK levels of at least twice the normal value on one or more occasions. The corresponding values for the control agent cholestyramine were 9 percent. This was attributable to the noncardiac fraction of CK. Large increases in CK have sometimes been reported (see WARNINGS , Myopathy/Rhabdomyolysis ). Expanded Clinical Evaluation of Lovastatin (EXCEL) Study Lovastatin was compared to placebo in 8,245 patients with hypercholesterolemia (total-C 240 to 300 mg/dL [6.2 to 7.8 mmol/L]) in the randomized, double-blind, parallel, 48 week EXCEL study. Clinical adverse experiences reported as possibly, probably or definitely drug-related in ≥ 1% in any treatment group are shown in the table below. For no event was the incidence on drug and placebo statistically different. Placebo (N = 1663) % Lovastatin 20 mg q.p.m. (N = 1642) % Lovastatin 40 mg q.p.m. (N = 1645) % Lovastatin 20 mg b.i.d. (N = 1646) % Lovastatin 40 mg b.i.d. (N = 1649) % Body As a Whole Asthenia 1.4 1.7 1.4 1.5 1.2 Gastrointestinal Abdominal pain 1.6 2.0 2.0 2.2 2.5 Constipation 1.9 2.0 3.2 3.2 3.5 Diarrhea 2.3 2.6 2.4 2.2 2.6 Dyspepsia 1.9 1.3 1.3 1.0 1.6 Flatulence 4.2 3.7 4.3 3.9 4.5 Nausea 2.5 1.9 2.5 2.2 2.2 Musculoskeletal Muscle cramps 0.5 0.6 0.8 1.1 1.0 Myalgia 1.7 2.6 1.8 2.2 3.0 Nervous System/Psychiatric Dizziness 0.7 0.7 1.2 0.5 0.5 Headache 2.7 2.6 2.8 2.1 3.2 Skin Rash 0.7 0.8 1.0 1.2 1.3 Special Senses Blurred vision 0.8 1.1 0.9 0.9 1.2 Other clinical adverse experiences reported as possibly, probably or definitely drug-related in 0.5 to 1.0 percent of patients in any drug-treated group are listed below. In all these cases the incidence on drug and placebo was not statistically different. Body as a Whole: chest pain; Gastrointestinal: acid regurgitation, dry mouth, vomiting; Musculoskeletal: leg pain, shoulder pain, arthralgia; Nervous System/Psychiatric: insomnia, paresthesia; Skin: alopecia, pruritus; Special Senses: eye irritation. In the EXCEL study (see CLINICAL PHARMACOLOGY , Clinical Studies in Adults ), 4.6% of the patients treated up to 48 weeks were discontinued due to clinical or laboratory adverse experiences which were rated by the investigator as possibly, probably or definitely related to therapy with lovastatin. The value for the placebo group was 2.5%. Air Force/Texas Coronary Atherosclerosis Prevention Study (AFCAPS/TexCAPS) In AFCAPS/TexCAPS (see CLINICAL PHARMACOLOGY , Clinical Studies in Adults ) involving 6,605 participants treated with 20 to 40 mg/day of lovastatin (n = 3,304) or placebo (n = 3,301), the safety and tolerability profile of the group treated with lovastatin was comparable to that of the group treated with placebo during a median of 5.1 years of follow-up. The adverse experiences reported in AFCAPS/TexCAPS were similar to those reported in EXCEL (see ADVERSE REACTIONS , Expanded Clinical Evaluation of Lovastatin (EXCEL) Study ). Concomitant Therapy In controlled clinical studies in which lovastatin was administered concomitantly with cholestyramine, no adverse reactions peculiar to this concomitant treatment were observed. The adverse reactions that occurred were limited to those reported previously with lovastatin or cholestyramine. Other lipid-lowering agents were not administered concomitantly with lovastatin during controlled clinical studies. Preliminary data suggests that the addition of gemfibrozil to therapy with lovastatin is not associated with greater reduction in LDL-C than that achieved with lovastatin alone. In uncontrolled clinical studies, most of the patients who have developed my

WARNINGS Myopathy/Rhabdomyolysis Lovastatin, like other inhibitors of HMG-CoA reductase, occasionally causes myopathy manifested as muscle pain, tenderness or weakness with creatine kinase (CK) above ten times the upper limit of normal (ULN). Myopathy sometimes takes the form of rhabdomyolysis with or without acute renal failure secondary to myoglobinuria, and rare fatalities have occurred. The risk of myopathy is increased by high levels of HMG-CoA reductase inhibitory activity in plasma. The risk of myopathy/rhabdomyolysis is dose related. In a clinical study (EXCEL) in which patients were carefully monitored and some interacting drugs were excluded, there was one case of myopathy among 4933 patients randomized to lovastatin 20 to 40 mg daily for 48 weeks, and 4 among 1649 patients randomized to 80 mg daily. There have been rare reports of immune-mediated necrotizing myopathy (IMNM), an autoimmune myopathy, associated with statin use. IMNM is characterized by: proximal muscle weakness and elevated serum creatine kinase, which persist despite discontinuation of statin treatment; muscle biopsy showing necrotizing myopathy without significant inflammation; improvement with immunosuppressive agents. All patients starting therapy with lovastatin, or whose dose of lovastatin is being increased, should be advised of the risk of myopathy and told to report promptly any unexplained muscle pain, tenderness or weakness particularly if accompanied by malaise or fever or if muscle signs and symptoms persist after discontinuing lovastatin. Lovastatin therapy should be discontinued immediately if myopathy is diagnosed or suspected. In most cases, muscle symptoms and CK increases resolved when treatment was promptly discontinued. Periodic CK determinations may be considered in patients starting therapy with lovastatin or whose dose is being increased, but there is no assurance that such monitoring will prevent myopathy. Many of the patients who have developed rhabdomyolysis on therapy with lovastatin have had complicated medical histories, including renal insufficiency usually as a consequence of long-standing diabetes mellitus. Such patients merit closer monitoring. Lovastatin therapy should be discontinued if markedly elevated CPK levels occur or myopathy is diagnosed or suspected. Lovastatin therapy should also be temporarily withheld in any patient experiencing an acute or serious condition predisposing to the development of renal failure secondary to rhabdomyolysis, e.g., sepsis; hypotension; major surgery; trauma; severe metabolic, endocrine, or electrolyte disorders; or uncontrolled epilepsy. The risk of myopathy/rhabdomyolysis is increased by concomitant use of lovastatin with the following: Strong inhibitors of CYP3A4: Lovastatin, like several other inhibitors of HMG-CoA reductase, is a substrate of cytochrome P450 3A4 (CYP3A4). Certain drugs which inhibit this metabolic pathway can raise the plasma levels of lovastatin and may increase the risk of myopathy. These include itraconazole, ketoconazole, posaconazole, voriconazole, the macrolide antibiotics erythromycin and clarithromycin, the ketolide antibiotic telithromycin, HIV protease inhibitors, boceprevir, telaprevir, the antidepressant nefazodone, or cobicistat-containing products. Combination of these drugs with lovastatin is contraindicated. If short-term treatment with strong CYP3A4 inhibitors is unavoidable, therapy with lovastatin should be suspended during the course of treatment (see CONTRAINDICATIONS ; PRECAUTIONS , Drug Interactions ). Gemfibrozil: The combined use of lovastatin with gemfibrozil should be avoided. Other lipid-lowering drugs (other fibrates or ≥ 1 g/day of niacin): Caution should be used when prescribing other fibrates or lipid-lowering doses (≥ 1 g/day) of niacin with lovastatin, as these agents can cause myopathy when given alone. The benefit of further alterations in lipid levels by the combined use of lovastatin with other fibrates or niacin should

CONTRAINDICATIONS Hypersensitivity to any component of this medication. Active liver disease or unexplained persistent elevations of serum transaminases (see WARNINGS ). Concomitant administration with strong CYP3A4 inhibitors (e.g., itraconazole, ketoconazole, posaconazole, voriconazole, HIV protease inhibitors, boceprevir, telaprevir, erythromycin, clarithromycin, telithromycin, nefazodone and cobicistat-containing products) (see WARNINGS , Myopathy/Rhabdomyolysis ). Pregnancy and Lactation (See PRECAUTIONS , Pregnancy and Nursing Mothers .) Atherosclerosis is a chronic process and the discontinuation of lipid-lowering drugs during pregnancy should have little impact on the outcome of long-term therapy of primary hypercholesterolemia. Moreover, cholesterol and other products of the cholesterol biosynthesis pathway are essential components for fetal development, including synthesis of steroids and cell membranes. Because of the ability of inhibitors of HMG-CoA reductase such as lovastatin to decrease the synthesis of cholesterol and possibly other products of the cholesterol biosynthesis pathway, lovastatin is contraindicated during pregnancy and in nursing mothers. Lovastatin should be administered to women of childbearing age only when such patients are highly unlikely to conceive. If the patient becomes pregnant while taking this drug, lovastatin should be discontinued immediately and the patient should be apprised of the potential hazard to the fetus (see PRECAUTIONS , Pregnancy ).

OVERDOSAGE After oral administration of lovastatin to mice, the median lethal dose observed was > 15 g/m 2 . Five healthy human volunteers have received up to 200 mg of lovastatin as a single dose without clinically significant adverse experiences. A few cases of accidental overdosage have been reported; no patients had any specific symptoms, and all patients recovered without sequelae. The maximum dose taken was 5 to 6 g. Until further experience is obtained, no specific treatment of overdosage with lovastatin can be recommended. The dialyzability of lovastatin and its metabolites in man is not known at present.