Cortisporin

Generic name: neomycin sulfate, polymyxin B sulfate, bacitracin zinc and hydrocortisone
Dosage form: ophthalmic ointment
Drug class:Ophthalmic steroids with anti-infectives

Medically reviewed by Drugs.com. Last updated on Sep 21, 2021.

Description

Cortisporin® Ophthalmic Ointment (neomycin and polymyxin B sulfates, bacitracin zinc, and hydrocortisone ophthalmic ointment) is a sterile antimicrobial and anti-inflammatory ointment for ophthalmic use. Each gram contains: neomycin sulfate equivalent to 3.5 mg neomycin base, polymyxin B sulfate equivalent to 10,000 polymyxin B units, bacitracin zinc equivalent to 400 bacitracin units, hydrocortisone 10 mg (1%), and white petrolatum, q.s.

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 µg of neomycin standard per mg, calculated on an anhydrous basis. The structural formulae are:

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:

Bacitracin zinc is the zinc salt of bacitracin, a mixture of related cyclic polypeptides (mainly bacitracin A) produced by the growth of an organism of the licheniformis group of Bacillus subtilis var Tracy. It has a potency of not less than 40 bacitracin units per mg. The structural formula is:

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

Clinical Pharmacology

Corticosteroids suppress the inflammatory response to a variety of agents and they probably delay or slow healing. Since c...