Indications
Eye: Inflammatory conditions (eg. uveitis, marginal keratitis, allergic conjunctivitis, blepharitis and episcleritis) where development of bacterial infection is likely.
Ear: Otitis externa and other inflammatory conditions where bacterial infection is present or suspected.
Nose: Inflammatory conditions where infection is present or suspected.
Therapeutic Class
Pharmacology
Betamethasone is a corticosteroid which is effective in inflammatory dermatoses. It is also effective in less responsive conditions such as psoriasis. Betamethasone has a 16β-methyl group that enhances the anti-inflammatory action of the molecule and reduces the sodium and water retaining properties of the fluorine atom bound at carbon 9.
Neomycin sulfate is bactericidal against many bacteria which are commonly associated with skin infections. Neomycin is a broad spectrum antibiotic which actively transported across the bacterial cell membrane, binds to a specific receptor protein on the 30s subunit of bacterial ribosomes, and interferes with an initiation complex between mRNA (messenger RNA) and the 30s subunit, inhibiting protein synthesis. DNA may be misread, thus producing nonfunctional proteins; polyribosomes are split apart and are unable to synthesize protein.
Dosage & Administration
Drops:
- Eye: 1 drop instilled into the eye every one or two hours until control is achieved, when the frequency may be reduced.
- Ear: 2 or 3 drops instilled into the ear, every two or three hours until control is achieved, when the frequency can be reduced.
- Nose: 2 or 3 drops instilled into each nostril two or three times daily.
Eye Ointment: It should be applied thinly and evenly to the conjunctival sac at night (If eye drops used during day) or 3-4 times daily (if ointment used alone).
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