Evaluation of bioequivalence of two formulations containing 100 milligrams of aceclofenac

The bioequivalence of two oral formulations containing aceclofenac 100 mg was determined in 24 healthy Indian male volunteers. The study was designed as a single dose, fasting, two-period two-sequence crossover study with a washout period of 1 week. The content of aceclofenac in plasma was determined by a validated HPLC method with UV detection. The preparations were compared using the parameters area under the plasma concentration - time curve (AUC(0-t)), area under the plasma concentration - time curve from zero to infinity (AUC(0-infinity)), peak plasma concentration (C-max), and time to reach peak plasma concentration (t(max)). No statistically significant difference was observed between the logarithmic transformed AUC(0-infinity) and C-max values of the two preparations. The 90% confidence interval for the ratio of the logarithmic transformed AUC(0-t), AUC(0-infinity), and C-max were within the bioequivalence limit of 0.80 - 1.25.