Bioequivalence could be a term in pharmacological medicine accustomed assess the expected in vivo biological equivalence of proprietary preparations of a drug. If two merchandise are same to be bioequivalent it means they might be expected to be, for all intents and functions, the same. For the planet Health Organization (WHO) "two pharmaceutical product area unit bioequivalent if they're pharmaceutically equivalent or pharmaceutical alternatives, and their bioavailabilities, in terms of rate (Cmax and tmax) and extent of absorption (area below the curve), when administration of identical molar dose below identical conditions, area unit the same as such a degree that their effects may be expected to be basically the same".