TELFA AMD ISLAND DRESSING 10cmx20cm Telfa? AMD island dressings are impregnated with PHMB (Polyhexamethylene Biguanide), a powerful yet safe antiseptic that has a broad range effectiveness against gram positive and gram negative microorganisms including some multi-drug resistant strains such as MRSA. AMD provides healthcare facilities a low cost, prophylactic method of treatment without changing nursing protocol. In addition to its antimicrobial capabilities the Telfa? AMD island dressing is an all-in-one dressing that is ideal for lightly draining wounds and helps save clinician time.