The invention belongs in the field of medicine and can be used in the treatment of chronic and asymptomatic trichomonas infections of the urogenital tract.The invention is consisted in development of new therapeutic substance of plant origin with minimal side effects for treatment of various forms of trichomonad infection.The new therapeutic substance, of plant origin, is an olive coloured paste. It is composed of a conifer green needle complex (CGNC) and has a coniferous smell and antiprotozoal activity against Trichomonas vaginalis (when tested in an in vitro model).At a concentration of 100 mg/ml CGNC has trichomonadocitic and trichomonadostatic properties. At 300 mg/ml it suppresses the growth of T. vaginalis and at 500 mg/ml it kills this organism.