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Rifampin
Aka: Rifampin
- Background
- Semisynthetic derivative of rifamycin
- Rifamycin produced by Streptomyces mediterranei
- Drug resistance emerges rapidly
- Must be used with other antituberculous drugs
- Indications
- Multi-drug Tuberculosis Treatment regimen
- Dosing
- Adult: 600 mg/day PO or IV
- Pediatric: 10-20 mg/kg/day (Max 600/day)
- Adverse Effects
- Nephritis or Acute Renal Failure
- Pruritus with or without Rash
- Thrombocytopenia and Hemolytic Anemia
- Influenza-like Syndrome
- Associated with infrequent dosing
- Body fluids become orange tinged
- Urine
- Sweat
- Tears (may discolor contact lenses)
- Adverse Effects: Hepatotoxicity - Risk Factors
- Slow acetylators
- Hepatitis C
- Hepatitis B
- Concurrent Hepatotoxin exposure
- Age over 50 years
- Pregnancy and postpartum (within 3 months)
- Malnutrition
- Drug Interactions: Increases other drug elimination
- Anticoagulants (Warfarin)
- Ketoconazole
- Chloramphenicol
- Methadone