.png | CAS_number = 1404-04-2 | ATC_prefix = A01 | ATC_suffix = AB08 | ATC_supplemental = , , , , , , , | PubChem = 8378 | DrugBank = APRD00013 | chemical_formula = C₂₃H₄₆N₆O₁₃ | molecular_weight = 614.644 g/mol | bioavailability = | protein_bound = | metabolism = | elimination_half-life = 2 to 3 hours | pregnancy_category = | legal_status = | routes_of_administration = }} Neomycin is an aminoglycoside antibiotic that is found in many topical medications such as creams, ointments and eyedrops.

Uses

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Neomycin is overwhelmingly used as a topical preparation. It can also be given orally, where it is usually combined with other antibiotics. Neomycin is not absorbed from the gastrointestinal tract, and has been used as a preventative measure for hepatic encephalopathy and hypercholesterolemia. By killing bacteria in the intestinal tract, it keeps ammonia levels low and prevents hepatic encephalopathy, especially prior to GI surgery. It is not given intravenously, as neomycin is extremely nephrotoxic (it causes kidney damage), especially compared to other aminoglycosides. The exception to this, is when it is included in some vaccines as a preservative, but in very small quantities -typically 0.025 mg per dose^*.

Spectrum

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Similar to other aminoglycosides, neomycin has excellent activity against Gram negative bacteria, and has partial activity against Gram positive bacteria. It is relatively toxic to humans, and some people have allergic reactions to it. See: Hypersensitivity.

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Dr. Donald Belsito: Rashes Earn Neomycin the Allergen of the Year Award. http://t.co/qmxvqTQ3
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