Rifampin Injection

Dosage form: injection, powder, lyophilized, for solution
Drug class:Rifamycin derivatives

Medically reviewed by Drugs.com. Last updated on Jan 1, 2022.

Rx only

To reduce the development of drug-resistant bacteria and maintain the effectiveness of rifampin for injection and other antibacterial drugs, rifampin should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria.

Rifampin Injection Description

Rifampin for injection, USP is a red colored lyophilized powder or cake that contains rifampin USP 600 mg, sodium formaldehyde sulfoxylate 10 mg, and sodium hydroxide to adjust pH.

Rifampin is a semisynthetic antibiotic derivative of rifamycin SV. Rifampin USP is a red to brown crystalline powder very slightly soluble in water at neutral pH, freely soluble in chloroform, soluble in ethyl acetate and in methanol. Its molecular weight is 822.95 and its chemical formula is C 43H 58N 4O 12. The chemical name for rifampin is either:

3-[[(4-Methyl-1-piperazinyl)imino]methyl]rifamycin

or

5,6,9,17,19,21-hexahydroxy-23-methoxy-2,4,12,16,18,20,22–heptamethyl-8-[N-(4-methyl-1-piperazinyl)formimidoyl]-2,7-(epoxypentadeca[1,11,13]trienimino)naphtho[2,1- b]furan-1,11(2H)-dione 21-acetate.

Its structural formula is: