Invention relates to silver complex of 4-(hydroxymethyl)pyridine, preparation method of this compound, and usage of this compound for preparation of formulation for inhibition of pathogenic cells' growth, for prevention or treatment of animal or human organism. In method according to the invention 4-(hydroxymethyl)pyridine and silver(I) compound at least partially soluble in reaction environment are used as a reagents. Reagents are combined in reaction environment containing at least one non-amine polar solvent in 0-50°C temperature and reaction is conducted for 1-180 minutes keeping 0-50°C temperature during mechanical stimulation of reaction environment, and subsequently silver complex of 4-(hydroxymethyl)pyridine is obtained.
