The present invention relates to a vaginal suppository comprising an inert vehicle and lactic acid or a salt thereof for the treatment and/or prophylaxis of disorders in the urogenital tract. It also relates to the use of such a suppository for the production of a medicament for the treatment and/or prophylaxis of disorders in the urogenital tract as well as to a method for the treatment and/or prophylaxis of disorders in the urogenital tract.