A pharmaceutical preparation for treatment of infectious and inflammatory diseases containing an effective quantity of an active component consisting of myristamidopropyldimethylbenzylammonium chloride of formula (I) in a pharmaceutical solvent, and its use for prophylaxis and treatment of specific and nonspecific diseases of urogenital system, as spermatocide, antiherpetic and anti-HIV agent, as well as antiseptic and disinfectant agent.
