Carbamazepina: biodisponibilidad de cuatro productos farmacéuticos orales / Bioavailability of carbamazepine from 4 products

ABSTRACT

The bioavailability of carba,azepine from 4 comercially available products was evaluated in 12 healthy volonteers. A crossover design was used and each patients received 400 mg of each product. Plasma levels of the drug were determined periodically for 72 h using a gas-liquid chromatographic method. An open model of one compartment for first-order absortion was assumed to derive pharmacokinetic parameters. Dissolution kinetics was also evaluated in each product. Significant differences in biovailability were shown for one product. Results correlated with the in vitro dissolution findings: