Arzneimittel Forsch
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Arzneimittel Forsch · Feb 2001
Randomized Controlled Trial Clinical TrialBioequivalence study of finasteride. Determination in human plasma by high-pressure liquid chromatography coupled to tandem mass spectrometry.
Two different finasteride (CAS 98319-26-7) tablet formulations were evaluated for their relative bioavailability (Flaxin tablets 5 mg, as the test formulation vs reference formulation, tablets 5 mg) in 23 healthy male volunteers who received a single 5 mg oral dose of each preparation. The study was open, randomized with a two-period crossover design and a 7-day washout period. Plasma samples were obtained over a 48-h interval. ⋯ Geometric mean test/reference formulations individual percent ratio was 95.71 for AUC0-48 h and 88.70% for Cmax. The 90% confidence interval for the geometric mean of the individual ratio test/reference formulations was 95.70-120.20% for AUC0-48 h, 94.60-121.30 for AUC0-infinity and 88.70-108% for Cmax. Since for both Cmax or AUC the 90% Cl values are within the interval proposed by the Food and Drug Administration, the test formulation is bioequivalent to the reference formulation for both the rate and extent of absorption after single dose administration.