FIELD: anti-parasitic means. SUBSTANCE: active substance is contained in porous polymer shaped product made by 1.1 to 10-fold stretching of polymer composition consisting of 100 weight parts of thermoplastic resin and 50 to 400 weight parts of filler, amount of active substance corresponding to its saturation degree when dissolved in given thermoplastic resin. Methods for preparing such products allow avoiding fast evolution of active substance. EFFECT: enabled retention of high amount of active substance and its evolution with constant rate. 18 cl, 4 dwg, 6 tbl, 25 ex
