Abstract
To determine the influence of human serum albumin (HSA) content in formulations on the bioequivalency of recombinant interferon alfa-2a, a double-blind, randomized, two-way crossover study was conducted in 24 healthy male volunteers. Subjects received a single subcutaneous injection of 18 million IU of Roferon-A reconstituted with either the diluent containing 10 mg of HSA or the HSA-free diluent; final HSA contents in the 2 formulations were 15 mg and 5 mg, respectively. Administration of the 2 formulations resulted in similar 48-hour Roferon-A serum concentration-time profiles and comparable frequency and intensity of adverse events. The statistical analysis using the two one-sided tests procedure showed that both formulations were bioequivalent for pharmacokinetic parameters such as Cmax, tmax, AUC48, and AUC. We conclude that a threefold change in HSA content in formulations does not alter the bioequivalency of Roferon-A.
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