Chemical Component Summary

FormulaC43 H58 N4 O12
Molecular Weight822.94
Isomeric SMILESCO[C@H]1\C=C\O[C@@]2(C)Oc3c(C2=O)c2c(O)c(\C=N\N4CCN(C)CC4)c(NC(=O)\C(C)=C/C=C/[C@H](C)[C@H](O)[C@@H](C)[C@@H](O)[C@@H](C)[C@H](OC(C)=O)[C@@H]1C)c(O)c2c(O)c3C

Chemical Details

Formal Charge0
Atom Count117
Chiral Atom Count9
Chiral AtomsC12, C20, C21, C22, C23, C24, C25, C26, C27
Bond Count121
Aromatic Bond Count11
Leaving Atomsn/a

Drug Info: DrugBank

DrugBank IDDB01045 Different stereochemistry
DescriptionA semisynthetic antibiotic produced from Streptomyces mediterranei. It has a broad antibacterial spectrum, including activity against several forms of Mycobacterium. In susceptible organisms it inhibits DNA-dependent RNA polymerase activity by forming a stable complex with the enzyme. It thus suppresses the initiation of RNA synthesis. Rifampin is bactericidal, and acts on both intracellular and extracellular organisms. (From Gilman et al., Goodman and Gilman's The Pharmacological Basis of Therapeutics, 9th ed, p1160)
  • 3-(((4-Methyl-1-piperazinyl)imino)methyl)rifamycin SV
  • RFP
  • Rifampicina
  • Rifampicinum
  • Rifampin
SaltsRifampicin sodium
Brand Names
  • Isonarif
  • Rifadin
  • Rifadin Cap 300mg
  • Rifadin IV
  • Rifadin IV Novaplus
Affected Organism
  • Mycobacteria
  • Mycobacterium tuberculosis
  • Various gram-negative and gram-positive eubacteria
IndicationFor the treatment of Tuberculosis and Tuberculosis-related mycobacterial infections.
PharmacologyRifampin is an antibiotic that inhibits DNA-dependent RNA polymerase activity in susceptible cells. Specifically, it interacts with bacterial RNA polymerase but does not inhibit the mammalian enzyme. It is bactericidal and has a very broad spectrum of activity against most gram-positive and gram-negative organisms (including <i>Pseudomonas aeruginosa</i>) and specifically <i>Mycobacterium tuberculosis</i>. Because of rapid emergence of resistant bacteria, use is restricted to treatment of mycobacterial infections and a few other indications. Rifampin is well absorbed when taken orally and is distributed widely in body tissues and fluids, including the CSF. It is metabolized in the liver and eliminated in bile and, to a much lesser extent, in urine, but dose adjustments are unnecessary with renal insufficiency.
Mechanism of actionRifampin acts via the inhibition of DNA-dependent RNA polymerase, leading to a suppression of RNA synthesis and cell death.
Route of administration
  • Intravenous
  • Oral
  • Amides
  • Anti-Bacterial Agents
  • Anti-Infective Agents
  • Antibiotics, Antitubercular
  • Antiinfectives for Systemic Use
  • J04AM02
  • J04AB02
  • J04AM06
  • J04AM05
CAS number13292-46-1
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682