Abstract: A non-degradable medical product comprising at least two substances or groups of substances, of which a first substance is referred to as substance A and a second is referred to as substance B, substance A being more lipophilic than substance B, wherein substance A has a solubility (w/w) in water of from 300 &mgr;g/ml to 1 &mgr;g/ml, substance B has a higher solubility than that of substance A, at least one of substance A and B is a pharmaceutically active substance, and wherein the amount of substance A or B is respectively from at least an effective amount to 10% by weight, based on the weight of the support material; with the exception of the combinations chlorohexidine/silver sulfadiazine, tri-closane/chlorohexidine, polyethylene gltcol/polyurethane, porous polyethylene with combinations of clotrimazole and triclosane.