Cortisporin Otic Suspension

CORTISPORIN® Otic Suspension
(neomycin and polymyxin B sulfates and hydrocortisone) Otic Suspension, USP

DRUG DESCRIPTION

CORTISPORIN® Otic Suspension (neomycin and polymyxin B sulfates and hydrocortisone otic suspension, USP) is a sterile antibacterial and anti-inflammatory suspension for otic use. Each mL contains: neomycin sulfate equivalent to 3.5 mg neomycin base, polymyxin B sulfate equivalent to 10,000 polymyxin B units, and hydrocortisone 10 mg (1%). The vehicle contains thimerosal 0.01% (added as a preservative) and the inactive ingredients cetyl alcohol, propylene glycol, polysorbate 80, and Water for Injection. Sulfuric acid may be added to adjust pH.

Neomycin sulfate is the sulfate salt of neomycin B and C, which are produced by the growth of Streptomyces fradiae Waksman (Fam. Streptomycetaceae). It has a potency equivalent of not less than 600 mcg of neomycin standard per mg, calculated on an anhydrous basis. The structural formulae are:

Neomycin sulfate structural formula illustration

Polymyxin B sulfate is the sulfate salt of polymyxin B1 and B2, which are produced by the growth of Bacillus polymyxa (Prazmowski) Migula (Fam. Bacillaceae). It has a potency of not less than 6,000 polymyxin B units per mg, calculated on an anhydrous basis. The structural formulae are:

Polymyxin B sulfate structural formula illustration

Hydrocortisone, 11b,17, 21-trihydroxypregn-4-ene-3, 20-dione, is an anti-inflammatory hormone. Its structural formula is:

Hydrocortisone structural formula illustration

What are the precautions when taking neomycin and polymyxin b sulfates and hydrocortisone otic suspension (Cortisporin Otic Suspension)?

Before using this medication, tell your doctor or pharmacist if you are allergic to neomycin, polymyxin, or hydrocortisone; or to aminoglycoside antibiotics (e.g., gentamicin, tobramycin), or to corticosteroids (e.g., dexamethasone, prednisone); or if you have any other allergies. This product may contain inactive ingredients (such as preservatives like sulfites, thimerosal), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: other ear problems (e.g., a hole in your eardrum, middle ear infection), an ear infection caused by a virus (e.g., herpes simplex, varicella).

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Last reviewed on RxList: 4/29/2008
This monograph has been modified to include the generic and brand name in many instances.

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