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Information about Neomycin

neomycin is a broad spectrum aminoglycoside antibiotic whose current use is limited to oral and topical administration.


Liver safety of Neomycin

Neomycin has minimal oral absorption and its use has not been linked to instances of acute liver injury.

Mechanism of action of Neomycin

Neomycin (nee" oh mye' sin) is an aminoglycoside with a broad spectrum of activity against both gram positive and gram negative organisms. Like other aminoglycosides, neomycin is thought to act by binding to bacterial ribosomes and inhibiting protein synthesis. neomycin has activity against many aerobic gram negative and gram positive bacteria, including the major E.Coli species resident in the colon as well as the enteropathogenic forms of E.Coli known to cause traveler’s diarrhea. Like other aminoglycosides, neomycin is poorly absorbed orally. The lack of absorption from the gastrointestinal tract is the basis of the main use of neomycin, as an oral agent to suppress intestinal bacterial flora.

Clinical use of Neomycin

Oral neomycin is indicated for treatment of infectious diarrhea, for suppression of intestinal bacterial flora in patients undergoing colorectal surgery, and as a means of decreasing colonic bacteria and production of ammonia in hepatic encephalopathy. Topical neomycin is used for burns, wounds and ulcerations and as otic suspensions for external otitis.

Dosage and administration for Neomycin

Neomycin is available in multiple generic forms including oral tablets of 500 mg. The typical adult dose of neomycin is 1 to 3 grams daily in four divided doses.

Side effects of Neomycin

Long term therapy should be avoided because of the possibility of some systemic absorption and the high rate of oto- and nephrotoxicity associated with neomycin use. Other adverse events include nausea, diarrhea, and Clostridium difficile related colitis.

List of aminoglycosides

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