Gentocin Durafilm by Merck is a veterinary prescription ophthalmic solution for dogs. Each mL delivers gentamicin sulfate (3 mg/mL) and betamethasone acetate (1 mg/mL) in a sterile, buffered aqueous base with benzalkonium chloride preservative. This canine eye care solution is designed for veterinarian-directed use when an antibiotic and corticosteroid combination is indicated. Convenient 5 mL bottle for accurate, hygienic application as prescribed.