药物信息为Trimethoprim Sulfate and Polymyxin B Sulfate Ophthalmic Solution (Akorn, Inc.): DESCRIPTION

Trimethoprim Sulfate and Polymyxin B Sulfate Ophthalmic Solution is a sterile antimicrobial solution for topical ophthalmic use. Trimethoprim sulfate, 2,4-diamino-5-(3,4,5-trimethoxybenzyl) pyrimidine sulfate (2:1), occurs as a white, odorless, crystalline powder with a molecular weight of 678.72. The structural formula is as follows:

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 formula is as follows:

Each mL contains:

Actives: Trimethoprim Sulfate equivalent to Trimethoprim 1 mg (0.1%) and Polymyxin B Sulfate 10,000 units. Preservative: Benzalkonium Chloride 0.04 mg (0.004%). Inactives: Sodium Chloride, Sulfuric Acid and Sodium Hydroxide may be added to adjust pH (3.0 to 5.5), and Purified Water USP.