Аннотация:The aim of the present work was to compare the influence of chronic administration of infusion (1 : 10), decoction (1 : 10) and tincture (1 : 5) from Chamaene-rium angustifolium (L.) Scop, above-ground part in dilutions 1 : 100; 1 : 1000; 1: 10 000 (0.1 ml, i. p.) within 14 days on behavioral processes in adult male rats. The level of anxiety was assessed in the elevated «plus» maze. The animals' behavior was estimated in the «open field» test. It has been established that chronic 121 administration of С. angustifolium decoction in dilutions 1 : 100 and 1 : 1000 and also C. angustifolium infusion in dilution 1:100 had considerable anxiolytic effect. On the contrary, C. angustifolium tincture showed weak anxiolytic action in all dilutions.