<p num="72">FIELD: medicine.</p> <p num="73">SUBSTANCE: invention refers to medicine, namely traumatology and orthopedics, namely to an antimicrobial composition for forming a spacer. Antimicrobial composition for forming a spacer based on bone cement with gentamycin also contains a plasticizer, Poviargolum, Dioxydin antiseptics, as well as high molecular weight polyvinylpyrrolidone with molecular weight of 1,000,000 Da, with a certain ratio of components.</p> <p num="74">EFFECT: use of the above composition prolongs the antimicrobial action of the antimicrobial composition to form a spacer based on bone cement with gentamycin; provides antimicrobial action of bone cement with gentamycin in relation to antibiotic-resistant microorganisms; prolongs hardening of bone cement with gentamycin when forming a spacer.</p> <p num="75">1 cl, 2 dwg, 2 tbl</p>