Dosing & Uses
Dosage Forms & Strengths
bacitracin ophthalmic/neomycin/polymyxin B/hydrocortisone
ophthalmic ointment
- 400units/0.35%/10,000units/1%
Ocular Inflammation/Infection
Apply thin ribbon of ointment to conjunctival sac of affected eye(s) q3-4hr, depending on severity
Safety and efficacy not established
Adverse Effects
Frequency Not Defined
Allergies
Glaucoma
Rash
Superinfection (herpes)
Warnings
Contraindications
Hypersensivity to neomycin
Glaucoma
Viral diseases of cornea and conjunctiva (epithelial herpes simplex keratitis, vaccinia, varicella)
Mycobacterial infection of eye & fungal diseases of ocular structures
Cautions
Not used much, because of hypersensitivity reactions to neomycin; also, because of steroid component, adequate follow up is essential
Prolonged use or misuse of ocular corticosteroid may result in glaucoma, superinfection (herpes) etc
Newer agents have better steroid & antibiotic coverage
Pregnancy & Lactation
Pregnancy Category: C
Lacation: Unknown
Pregnancy Categories
A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.
B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk. C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done. D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk. X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist. NA: Information not available.Pharmacology
Mechanism of Action
Bacitracin: Inhibits bacterial cell wall synthesis by preventing the incorporation of amino acids and nucleotides into the cell wall
Neomycin: Interferes with bacterial protein synthesis by binding to 30S ribosomal subunits
Polymyxin B: Bactericidal; causes leakage of bacterial membrane
Hydrocortisone: Decrease inflammation by stabilizing leukocyte lysosomal membranes, preventing release of destructive acid hydrolases from leukocytes
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Formulary
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