Maxitrol Eye Ointment 3.5mgMaxitrol is a combination of three medications. Neomycin is an antibiotic. It kills bacteria by preventing them from making proteins that they need to survive. Polymyxin B is another antibiotic that kills bacteria by destroying the bacteria's protective covering. Dexamethasone is a corticosteroid. When its used in the eye, it lowers the amount of inflammatory chemicals that cause pain, redness, and swelling there. This helps lower eye inflammation and