Bactrim

Drug Description
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Bactrim
(sulfamethoxazole and trimethoprim) Tablets

To reduce the development of drug-resistant bacteria and maintain the effectiveness of Bactrim (sulfamethoxazole and trimethoprim) tablets and other antibacterial drugs, Bactrim (sulfamethoxazole and trimethoprim) tablets should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria.

DRUG DESCRIPTION

Bactrim (sulfamethoxazole and trimethoprim) is a synthetic antibacterial combination product available in DS (double strength) tablets, each containing 800 mg sulfamethoxazole and 160 mg trimethoprim; in tablets, each containing 400 mg sulfamethoxazole and 80 mg trimethoprim for oral administration.

Sulfamethoxazole is N1 - (5-methyl-3-isoxazolyl) sulfanilamide; the molecular formula is C10H11N3O3S. It is almost white, odorless, tasteless compound with a molecular weight of 253.28 and the following structural formula:

Sulfamethoxazole structural formula illustration

Trimethoprim is 2,4-diamino-5-(3,4,5-trimethoxybenzyl) pyrimidine; the molecular formula is C14H18N4O3. It is a white to light yellow, odorless, bitter compound with a molecular weight of 290.3. It has the following structural formula:

Trimethoprim structural formula illustration

Inactive ingredients: Docusate sodium 85%, sodium benzoate 15%, sodium starch glycolate, magnesium stearate and pregelatinized starch.

Last updated on RxList: 6/26/2007

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