Compositions containing silver ammonium phenytoin complex and a phenytoin are usefully employed, particularly when applied topically, for the treatment of animal or human tissue, for wound healing and are useful in wound dressing preparations for the prevention or treatment of infections. The compositions are usefully applied by direct topical application to the wound or tissue to be treated or may be directly applied to the wound or tissue or incorporated in or coated on a dressing, such as a bandage.