The main physical-chemical drug properties (molecular weight, lipophility) are counted, their role in realization of biopharmaceutical and pharmacokinetic parameters (time absorption, bioavailibity, clearance, distributing volume, elimination half-time), which provides the pharmacodynamic features, is determined. For the first time the classification of the known benzdiazepines according to their bioavailability and pharmacological activity (anxiolytic, hypnotic, miorelaxation, anticonvusive) spectrum had been made.
