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Osurnia is a prescription ear medication for dogs that treats otitis externa, outer ear infections. Osurnia is a triple acting ear gel that contains an antibiotic, antifungal, and a steroid: florfenicol, terbinafine, and betamethasone. Applied into the ear, it works to reduce pain and inflammation as well as kill certain types of bacteria, yeast, and fungi that cause infections. Available in 2ct single dose tubes.