Summary.

In current work, there are summarized the phytochemical studies for plants from Bulgarian flora: Tribulus terrestris, Silibum marianum, Clinopodium vulgare, Leucorus nivalis, and drugs, containing extracts from this plants. By HPLC, there are determined the quantities of water and fat soluble vitamines: C, B, A, beta-carotene, E and D in plants; protodioscin in preparations, containing extracts from Trubulus terrestris; Galanthamine in Nivalin. Recently, the efforts are orientated to the realization of the complete control of quality and safety of plant products in compliance with Pharmacopoeial requirements and also the investigation of antioxidant effect.