Merck Otomax Otic Ointment is a prescription topical dog ear medication for veterinary-directed canine ear care. It is indicated for the treatment of acute and chronic otitis externa in dogs associated with yeast (Malassezia pachydermatis) and/or bacteria susceptible to gentamicin. The triple-action formula combines an antibiotic, antifungal, and corticosteroid for targeted ear treatment. Easy to apply as a topical ointment, Otomax supports dog ear infection treatment and canine ear health under your veterinarian’s guidance.