The invention relates to octenidine or a pharmaceutical salt thereof, in particular octenidine dihydrochloride, which is intended for mutual therapeutic administration of the octenidine in solution with a polyalcohol of formula (1a) or (1b):(H—C—OH)a(HO—C—OH)b(H—C—H)c(CHO) (1a),(H—C—OH)a(HO—C—OH)b(H—C—H)c(CO) (1b),wherein a, b, c are whole numbers, where a+b is at least 2, preferably at least 3, c is selected from 0, 1 or a number from 2 to a+b, provided that the aldehyde group of formula (1a) is in a form of an acetal with one of the hydroxy groups or the keto group of formula (1b) is in a form of an acetal with one of the hydroxy groups. The invention also relates to kits containing these ingredients, and use thereof for treating infections and wounds.