Otomax is a prescription medicine FDA approved for veterinary use in dogs. Otomax is available in 7.5 gm and 15 gm tubes and 15 gm, 30 gm, and 215 gm bottles. Each gm contains gentamicin sulfate equivalent to 3mg gentamicin base, betamethasone valerate equivalent to 1mg betamethasone and clotrimazole 10 mg. Prior to use the external ear should be cleaned and dried and excessive hair should be clipped from the treatment area. Otomax should not be used in pets with perforated eardrums.