Rosuvastatin Calcium 20 mg Tablet, Film Coated, 30-count — NDC 50090-6422-0 (Billing 50090-6422-00)

12 CLINICAL PHARMACOLOGY

12.1Mechanism of Action Rosuvastatin tablets is a selective and competitive inhibitor of HMG-CoA reductase, the rate-limiting enzyme that converts 3–hydroxy–3–methylglutaryl coenzyme A to mevalonate, a precursor of cholesterol. In vivo studies in animals, and in vitro studies in cultured animal and human cells have shown rosuvastatin to have a high uptake into, and selectivity for, action in the liver, the target organ for cholesterol lowering. In in vivo and in vitro studies, rosuvastatin produces its lipid-modifying effects in two ways.

First, it increases the number of hepatic LDL receptors on the cell-surface to enhance uptake and catabolism of LDL. Second, rosuvastatin inhibits hepatic synthesis of VLDL, which reduces the total number of VLDL and LDL particles.

12.2Pharmacodynamics Rosuvastatin tablets dose dependently reduces elevated LDL-cholesterol and reduces total cholesterol and triglycerides and increases HDL-cholesterol [see Clinical Studies (14)]. A therapeutic response to rosuvastatin tablets is evident within 1 week of commencing therapy and 90% of maximum response is usually achieved in 2 weeks. The maximum response is usually achieved by 4 weeks and is maintained after that.

Individualization of drug dosage should be based on the therapeutic response [see Dosage and Administration (2)].

12.3Pharmacokinetics Absorption In clinical pharmacology studies in man, peak plasma concentrations of rosuvastatin were reached 3 to 5 hours following oral dosing. Both C max and AUC increased in approximate proportion to rosuvastatin tablets dose. The absolute bioavailability of rosuvastatin is approximately 20%.

Administration of rosuvastatin tablets with food did not affect the AUC of rosuvastatin. The AUC of rosuvastatin does not differ following evening or morning drug administration. Distribution Mean volume of distribution at steady-state of rosuvastatin is approximately 134 liters.

Rosuvastatin is 88% bound to plasma proteins, mostly albumin. This binding is reversible and independent of plasma concentrations. Elimination Rosuvastatin is primarily eliminated by excretion in the feces.

The elimination half-life of rosuvastatin is approximately 19 hours. Metabolism Rosuvastatin is not extensively metabolized; approximately 10% of a radiolabeled dose is recovered as metabolite. The major metabolite is N-desmethyl rosuvastatin, which is formed principally by cytochrome P450 \ 2C9, and in vitro studies have demonstrated that N-desmethyl rosuvastatin has approximately one-sixth to one-half the HMG–CoA reductase inhibitory activity of the parent compound.

Overall, greater than 90% of active plasma HMG–CoA reductase inhibitory activity is accounted for by the parent compound. Excretion Following oral administration, rosuvastatin and its metabolites are primarily excreted in the feces (90%). After an intravenous dose, approximately 28% of total body clearance was via the renal route, and 72% by the hepatic route.

Specific Populations Racial or Ethnic Groups: A population pharmacokinetic analysis revealed no clinically relevant differences in pharmacokinetics among Caucasian, Hispanic, and Black or Afro-Caribbean groups. However, pharmacokinetic studies, including one conducted in the US, have demonstrated an approximate 2–fold elevation in median exposure (AUC and Cmax) in Asian subjects when compared with a Caucasian control group. Male and Female Patients: There were no differences in plasma concentrations of rosuvastatin between men and women.

Pediatric use information for patients ages 8 to less than 10 years is approved for AstraZeneca’s CRESTOR (rosuvastatin calcium) tablets. However, due to AstraZeneca’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. Geriatric Patients: There were no differences in plasma concentrations of rosuvastatin between the nonelderly and elderly populations (age ≥65 years).

Patients with Renal Impairment: Mild to modera… [Excerpted — this section continues on DailyMed.]

12.1Mechanism of Action Rosuvastatin tablets is a selective and competitive inhibitor of HMG-CoA reductase, the rate-limiting enzyme that converts 3–hydroxy–3–methylglutaryl coenzyme A to mevalonate, a precursor of cholesterol. In vivo studies in animals, and in vitro studies in cultured animal and human cells have shown rosuvastatin to have a high uptake into, and selectivity for, action in the liver, the target organ for cholesterol lowering. In in vivo and in vitro studies, rosuvastatin produces its lipid-modifying effects in two ways.

First, it increases the number of hepatic LDL receptors on the cell-surface to enhance uptake and catabolism of LDL. Second, rosuvastatin inhibits hepatic synthesis of VLDL, which reduces the total number of VLDL and LDL particles.

12.3Pharmacokinetics Absorption In clinical pharmacology studies in man, peak plasma concentrations of rosuvastatin were reached 3 to 5 hours following oral dosing. Both C max and AUC increased in approximate proportion to rosuvastatin tablets dose. The absolute bioavailability of rosuvastatin is approximately 20%.

Administration of rosuvastatin tablets with food did not affect the AUC of rosuvastatin. The AUC of rosuvastatin does not differ following evening or morning drug administration. Distribution Mean volume of distribution at steady-state of rosuvastatin is approximately 134 liters.

Rosuvastatin is 88% bound to plasma proteins, mostly albumin. This binding is reversible and independent of plasma concentrations. Elimination Rosuvastatin is primarily eliminated by excretion in the feces.

The elimination half-life of rosuvastatin is approximately 19 hours. Metabolism Rosuvastatin is not extensively metabolized; approximately 10% of a radiolabeled dose is recovered as metabolite. The major metabolite is N-desmethyl rosuvastatin, which is formed principally by cytochrome P450 \ 2C9, and in vitro studies have demonstrated that N-desmethyl rosuvastatin has approximately one-sixth to one-half the HMG–CoA reductase inhibitory activity of the parent compound.

Overall, greater than 90% of active plasma HMG–CoA reductase inhibitory activity is accounted for by the parent compound. Excretion Following oral administration, rosuvastatin and its metabolites are primarily excreted in the feces (90%). After an intravenous dose, approximately 28% of total body clearance was via the renal route, and 72% by the hepatic route.

Specific Populations Racial or Ethnic Groups: A population pharmacokinetic analysis revealed no clinically relevant differences in pharmacokinetics among Caucasian, Hispanic, and Black or Afro-Caribbean groups. However, pharmacokinetic studies, including one conducted in the US, have demonstrated an approximate 2–fold elevation in median exposure (AUC and Cmax) in Asian subjects when compared with a Caucasian control group. Male and Female Patients: There were no differences in plasma concentrations of rosuvastatin between men and women.

Pediatric use information for patients ages 8 to less than 10 years is approved for AstraZeneca’s CRESTOR (rosuvastatin calcium) tablets. However, due to AstraZeneca’s marketing exclusivity rights, this drug product is not labeled with that pediatric information. Geriatric Patients: There were no differences in plasma concentrations of rosuvastatin between the nonelderly and elderly populations (age ≥65 years).

Patients with Renal Impairment: Mild to moderate renal impairment (CLcr ≥ 30 mL/min/1.73 m2) had no influence on plasma concentrations of rosuvastatin. However, plasma concentrations of rosuvastatin increased to a clinically significant extent (about 3-fold) in patients with severe renal impairment (CLcr < 30 mL/min/1.73 m2) not receiving hemodialysis compared with healthy subjects (CLcr > 80 mL/min/1.73 m2). Hemodialysis Steady-state plasma concentrations of rosuvastatin in patients on chronic hemodialysis were approximately 50% greater compared with healthy volunteer subjects with normal renal function.

Patients with Hepatic Impairment: In patients with chronic alcohol liver disease, plasma concentrations of rosuvastatin were modestly increased. In patients with Child–Pugh A disease, Cmax and AUC were increased by 60% and 5%, respectively, as compared with patients with normal liver function. In patients with Child–Pugh B disease, Cmax and AUC were increased 100% and 21%, respectively, compared with patients with normal liver function.

Drug Interactions Studies: Rosuvastatin clearance is not dependent on metabolism by cytochrome P450 3A4 to a clinically significant extent. Rosuvastatin is a substrate for certain transporter proteins including the hepatic uptake transporter organic anion-transporting polyprotein 1B1 (OATP1B1) and efflux transporter breast cancer resistance pr… [Excerpted — this section continues on DailyMed.]

12.2Pharmacodynamics Rosuvastatin tablets dose dependently reduces elevated LDL-cholesterol and reduces total cholesterol and triglycerides and increases HDL-cholesterol [see Clinical Studies (14)]. A therapeutic response to rosuvastatin tablets is evident within 1 week of commencing therapy and 90% of maximum response is usually achieved in 2 weeks. The maximum response is usually achieved by 4 weeks and is maintained after that.

Individualization of drug dosage should be based on the therapeutic response [see Dosage and Administration (2)].

14 CLINICAL STUDIES

14.3Hypertriglyceridemia Dose-Response Study : In a double-blind, placebo-controlled dose-response study in patients with baseline TG levels from 273 to 817 mg/dL, rosuvastatin tablets given as a single daily dose (5 to 40 mg) over 6 weeks significantly reduced serum TG levels (Table 9). Table 9. Dose-Response in Patients with Primary Hypertriglyceridemia over 6 Weeks Dosing Median (Min, Max) Percent Change from Baseline Dose Placebo (n=26) Rosuvastatin tablets 5 mg (n=25) Rosuvastatin tablets 10 mg (n=23) Rosuvastatin tablets 20 mg (n=27) Rosuvastatin tablets 40 mg (n=25) Triglycerides 1 (-40, 72) -21 (-58, 38) -37 (-65, 5) -37 (-72, 11) -43 (-80, -7) nonHDL-C 2 (-13, 19) -29 (-43, -8) -49 (-59, -20) -43 (-74, 12) -51 (-62, -6) VLDL-C 2 (-36, 53) -25 (-62, 49) -48 (-72, 14) -49 (-83, 20) -56 (-83, 10) Total-C 1 (-13, 17) -24 (-40, -4) -40 (-51, -14) -34 (-61, -11) -40 (-51, -4) LDL-C 5 (-30, 52) -28 (-71, 2) -45 (-59, 7) -31 (-66, 34) -43 (-61, -3) HDL-C -3 (-25, 18) 3 (-38, 33) 8 (-8, 24) 22 (-5, 50) 17 (-14, 63)

14.4Primary Dysbetalipoproteinemia (Type III Hyperlipoproteinemia) In a randomized, multicenter, double-blind crossover study, 32 patients (27 with є2/є2 and 4 with apo E mutation [Arg145Cys] with primary dysbetalipoproteinemia (Type III Hyperlipoproteinemia) entered a 6-week dietary lead-in period on the NCEP Therapeutic Lifestyle Change (TLC) diet. Following dietary lead-in, patients were randomized to a sequence of treatments in conjunction with the TLC diet for 6 weeks each: rosuvastatin 10 mg followed by rosuvastatin 20 mg or rosuvastatin 20 mg followed by rosuvastatin 10 mg.

Rosuvastatin tablets reduced non HDL–C (primary end point) and circulating remnant lipoprotein levels. Results are shown in the table below. Table 10.

Lipid-modifying Effects of Rosuvastatin 10 mg and 20 mg in Primary Dysbetalipoproteinemia (Type III hyperlipoproteinemia) After Six Weeks by Median Percent Change (95% CI) from Baseline (N=32) Median at Baseline (mg/dL) Median percent change from baseline (95 % CI) rosuvastatin tablets 10 mg Median percent change from baseline (95% CI) rosuvastatin tablets 20 mg Total-C 342.5 -43.3 (-46.9,-37.5) -47.6 (-51.6,-42.8) Triglycerides 503.5 -40.1 (-44.9, -33.6) -43.0 (-52.5, -33.1) NonHDL-C 294.5 -48.2 (-56.7, -45.6) -56.4 (-61.4, -48.5) VLDL-C + IDL-C 209.5 -46.8 (-53.7, -39.4) -56.2 (-67.7, -43.7) LDL-C 112.5 -54.4 (-59.1, -47.3) -57.3 (-59.4, -52.1) HDL-C 35.5 10.2 (1.9, 12.3) 11.2 (8.3, 20.5) RLP-C 82.0 -56.4 (-67.1, -49.0) -64.9 (-74.0, -56.6) Apo-E 16.0 -42.9 (-46.3, -33.3) -42.5 (-47.1, -35.6)

14.5Homozygous Familial Hypercholesterolemia Dose-Titration Study : In an open-label, forced-titration study, homozygous FH patients (n=40, 8 to 63 years) were evaluated for their response to rosuvastatin tablets 20 to 40 mg titrated at a 6–week interval. In the overall population, the mean LDL–C reduction from baseline was 22%. About one-third of the patients benefited from increasing their dose from 20 mg to 40 mg with further LDL lowering of greater than 6%.

In the 27 patients with at least a 15% reduction in LDL–C, the mean LDL-C reduction was 30% (median 28% reduction). Among 13 patients with an LDL–C reduction of <15%, 3 had no change or an increase in LDL–C. Reductions in LDL–C of 15% or greater were observed in 3 of 5 patients with known receptor negative status.

Pediatric use information for patients 7 to 17 years of age is approved for AstraZeneca’s CRESTOR (rosuvastatin calcium) tablets. However, due to AstraZeneca’s marketing exclusivity rights, this drug product is not labeled with that pediatric information.

13 NONCLINICAL TOXICOLOGY

13.1Carcinogenesis & Mutagenesis & Impairment of Fertility In a 104-week carcinogenicity study in rats at dose levels of 2, 20, 60, or 80 mg/kg/day by oral gavage, the incidence of uterine stromal polyps was significantly increased in females at 80 mg/kg/day at systemic exposure 20 times the human exposure at 40 mg/day based on AUC. Increased incidence of polyps was not seen at lower doses. In a 107-week carcinogenicity study in mice given 10, 60, or 200 mg/kg/day by oral gavage, an increased incidence of hepatocellular adenoma/carcinoma was observed at 200 mg/kg/day at systemic exposures 20 times the human exposure at 40 mg/day based on AUC.

An increased incidence of hepatocellular tumors was not seen at lower doses. Rosuvastatin was not mutagenic or clastogenic with or without metabolic activation in the Ames test with Salmonella typhimurium and Escherichia coli, the mouse lymphoma assay, and the chromosomal aberration assay in Chinese hamster lung cells. Rosuvastatin was negative in the in vivo mouse micronucleus test.

In rat fertility studies with oral gavage doses of 5, 15, 50 mg/kg/day, males were treated for 9 weeks prior to and throughout mating and females were treated 2 weeks prior to mating and throughout mating until gestation day 7. No adverse effect on fertility was observed at 50 mg/kg/day (systemic exposures up to 10 times the human exposure at 40 mg/day based on AUC). In testicles of dogs treated with rosuvastatin at 30 mg/kg/day for one month, spermatidic giant cells were seen.

Spermatidic giant cells were observed in monkeys after 6–month treatment at 30 mg/kg/day in addition to vacuolation of seminiferous tubular epithelium. Exposures in the dog were 20 times and in the monkey 10 times the human exposure at 40 mg/day based on body surface area. Similar findings have been seen with other drugs in this class.

13.2Animal Toxicology and/or Pharmacology Central Nervous System Toxicity CNS vascular lesions, characterized by perivascular hemorrhages, edema, and mononuclear cell infiltration of perivascular spaces,have been observed in dogs treated with several other members of this drug class. A chemically similar drug in this class produced dose-dependent optic nerve degeneration (Wallerian degeneration of retinogeniculate fibers) in dogs, at a dose that produced plasma drug levels about 30 times higher than the mean drug level in humans taking the highest recommended dose.

Edema, hemorrhage, and partial necrosis in the interstitium of the choroid plexus was observed in a female dog sacrificed moribund at day 24 at 90 mg/kg/day by oral gavage (systemic exposures 100 times the human exposure at 40 mg/day based on AUC). Corneal opacity was seen in dogs treated for 52 weeks at 6 mg/kg/day by oral gavage (systemic exposures 20 times the human exposure at 40 mg/day based on AUC).Cataracts were seen in dogs treated for 12 weeks by oral gavage at 30 mg/kg/day (systemic exposures 60 times the human exposure at 40 mg/day based on AUC).

Retinal dysplasia and retinal loss were seen in dogs treated for 4 weeks by oral gavage at 90 mg/kg/day (systemic exposures 100 times the human exposure at 40 mg/day based on AUC). Doses ≤30 mg/kg/day (systemic exposures ≤60 times the human exposure at 40 mg/day based on AUC) did not reveal retinal findings during treatment for up to one year. Juvenile Toxicology Study In a juvenile study, rats were dosed by oral gavage with 10 or 50 mg/kg/day from weaning for 9 weeks prior to pairing, throughout pairing and up to the day before necropsy for males or up to gestation day 7 for females.

No effects on sexual development, testicular and epididymal appearance or fertility were observed at either dose level. Pediatric information is approved for AstraZeneca’s CRESTOR (rosuvastatin calcium) tablets. However, due to AstraZeneca’s marketing exclusivity rights, this drug product is not labeled with that pediatric information.