Neomycin and Polymyxin B Sulfates and
Dexamethasone Ophthalmic Suspension is a multiple dose anti-infective
steroid combination in a sterile suspension for topical application.
Neomycin Sulfate is the sulfate salt of neomycin B and C which are produced by the growth of Streptomyces fradiae Waksman. It has a potency equivalent to not less than 600 micrograms of neomycin base per milligram, calculated on an anhydrous basis.
Polymyxin B Sulfate is the sulfate salt of Polymyxin B1 and B2 which are produced by the growth of Bacillus polymyxa Migula. It has a potency of not less than 6,000 Polymyxin B units per milligram, calculated on an anhydrous basis.
The 4 mg/mL injection strength may be used for intralesional and soft tissue administration. Doses range from mg to 4 mg injected as a single dose at the appropriate site. For soft tissue and bursal injections a dose of 2 to 4 mg is recommended. Ganglia require a dose of 1 to 2 mg. A dose of to 1 mg is used for injection into tendon sheaths. Usually employed when condition to be treated is limited to 1 or 2 sites. Dosage dependent upon degree of inflammation, size, disease state, and location of affected area. Repeat doses may be given from once every 3 to 5 days to once every 2 to 3 weeks.
Prolonged use may result in glaucoma , with damage to the optic nerve , defects in visual acuity and fields of vision, and posterior subcapsular cataract formation. Prolonged use may suppress the host response and thus increase the hazard of secondary ocular infections. In those diseases causing thinning of the cornea or sclera , perforations have been known to occur with the use of topical steroids. In acute purulent conditions of the eye, steroids may mask infection or enhance existing infection. If this product is used for 10 days or longer, intraocular pressure should be routinely monitored even though it may be difficult in children and uncooperative patients.