Indications
Therapeutic Class
Pharmacology
Neomycin, an aminoglyoside with antimicrobial spectrum similar to gentamicin, binds to the 30S subunits of the bacterial ribosome, inhibiting protein synthesis and thereby disrupting DNA synthesis. It is active against many gram negative aerobes and against some strains of staphylococci.
Bacitracin inhibits bacterial cell wall synthesis and is active against many gram-positive bacteria (e.g. staphylococci, streptococci, corynebacteria and Clostridia) and some gram-negative species (e.g. Neisseria and Haemophilus influenzae). They are often found in combinations in topical preparations as broad spectrum antibacterial agents.
Polymyxin B disrupts the bacterial cytoplasmic membrane of mostly gram positive organisms allowing leakage of intracellular constituents by binding to membrane phospholipids.
Dosage & Administration
Contraindications
Side Effects
Pregnancy & Lactation
Precautions & Warnings
This ointment is not intended for sterile use in surgical procedures such as those involving abdominal or thoracic cavities as there is evidence that neomycin, when in contact with peritoneal or pleural tissues, can potentiate neuromuscular block in patients under the influence of muscle relaxants, producing respiratory paralysis. As with other antibiotic preparations prolonged use may result in overgrowth of non- susceptible organisms. Ototoxicity to neomycin has been reported.
In neonates and infants, absorption by immature skin may be enhanced and renal function may be immature.
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