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What is bacitracin?

Bacitracin is the active ingredient in over-the-counter (OTC) ointment products for self treatment of minor skin infections. It is also available by prescription in an ophthalmic ointment for eye infection and a powder for solution for intramuscular (IM) injection for lung infections caused by susceptible Staphylococci. Because bacitracin is active against gram-positive organisms only, the OTC ointment is often combined with either or both neomycin and polymyxin B, which are effective against gram-negative organisms.

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