Rifampin / Rifampicin (Rifampin (also known as Rifampicin)) — Uses, Dosage, Side Effects & Safety

Drug class: Antibiotic (Rifamycin class)

Overview

Rifampin (also called Rifampicin) is a prescription antibiotic used to treat several serious bacterial infections, most notably tuberculosis (TB) and leprosy. It is also used to prevent certain types of meningitis and to treat other infections caused by susceptible bacteria. Rifampin works by stopping the growth of bacteria. It does this by blocking an enzyme bacteria need to make RNA, which is essential for their survival. This makes it a key part of combination therapy for TB and other mycobacterial infections. Key points for patients: Rifampin can cause your urine, sweat, saliva, and tears to turn a reddish-orange color—this is harmless but can stain contact lenses and clothing. It is important to take rifampin exactly as prescribed and not to miss doses, as skipping doses can lead to treatment failure or resistance.

Therapeutic uses

  • Tuberculosis
  • Leprosy
  • Meningococcal prophylaxis
  • Haemophilus influenzae type b prophylaxis

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Common side effects

  • Orange-red discoloration of urine, sweat, tears, and saliva
  • Nausea
  • Vomiting
  • Diarrhea
  • Rash
  • Hepatotoxicity (liver damage)
  • Flu-like syndrome
  • Thrombocytopenia

Frequently Asked Questions about Rifampin / Rifampicin

Why does rifampin turn my urine orange?

Rifampin is excreted in body fluids and can cause a harmless reddish-orange discoloration of urine, sweat, saliva, and tears. This is expected and not a cause for concern.

Can I drink alcohol while taking rifampin?

It is best to avoid alcohol while taking rifampin, as both can increase the risk of liver damage.

Does rifampin affect birth control?

Yes, rifampin can make hormonal birth control less effective. Use additional non-hormonal contraception while taking rifampin.

What should I do if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose. Do not take two doses at once.

How long will I need to take rifampin?

The duration depends on your condition. For tuberculosis, treatment usually lasts 6 months or longer. Always complete the full course as prescribed.

Can rifampin be used alone to treat tuberculosis?

No, rifampin should always be used in combination with other anti-TB drugs to prevent resistance.

What are the signs of serious liver problems with rifampin?

Warning signs include yellowing of the skin or eyes, dark urine, severe fatigue, abdominal pain, and persistent nausea or vomiting. Contact your doctor immediately if these occur.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.