Bioavailability of amlodipine besylate/atorvastatin calcium combination tablet

The bioequivalence of combination tablets containing amlodipine besylate/atorvastatin calcium with coadministered matching doses of amlodipine besylate and atorvastatin calcium tablets was investigated in randomized, 2-way crossover studies in healthy volunteers (N = 126). Subjects received a single dose of the amlodipine/atorvastatin tablet or coadministered matching doses of amlodipine and atorvastatin at the highest (10/80 mg; n = 62) and lowest (5/10 mg; n = 64) dose strengths. Atorvastatin geometric mean ratios for maximum plasma concentration (C-max and area under the plasma concentrotion-time curve (AUC for the highest and lowest dose strengths were 94.1 and 98.8, and 104.5 and 103.8, respectively. Amlodipine geometric mean ratios for C-max and AUC for the highest and lowest dose strengths were 100.8 and 103.4, and 100 and 102.7, respectively. The 90% confidence intervals for all comparisons were within 80% to 125%, demonstrating bioequivalence for amlodipine and atorvastatin at both dose strengths. Use of amlodipine/ atorvastatin combination tablets may provide a more integrated approach to treatmentof cardiovascular risk.