Rifadin (rifampin)
Also marketed as Rimactane. An approved treatment for Bartonellosis.
The same compound appears under different names depending on the context. Here is how to identify Rifampin wherever you encounter it, plus the key facts at a glance.
- Generic name
- Rifampin
- Brand names
- Rifadin, Rimactane
- Drug class
- Rifamycin antibiotic
- How it's taken
- For bartonellosis, rifampin is typically given 300 mg orally twice daily as part of a combination regimen (often with doxycycline or azithromycin).
A rifamycin antibiotic used in combination regimens for Bartonella infections, particularly for neurobartonellosis and endocarditis. Its ability to penetrate biofilms makes it relevant for chronic bartonellosis.
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How Rifampin works
Rifampin inhibits bacterial DNA-dependent RNA polymerase, blocking RNA synthesis at the transcription level. It achieves high intracellular concentrations and can penetrate biofilm structures, which is why some practitioners include it in combination regimens for chronic Bartonella infections where biofilm persistence is suspected.
Mechanism: Rifamycin antibiotic that inhibits bacterial DNA-dependent RNA polymerase
Side effects and safety
Rifampin turns body fluids (urine, tears, sweat) orange-red, which is harmless but can stain contact lenses and clothing. It is a potent CYP3A4 inducer and accelerates the metabolism of many drugs including oral contraceptives, warfarin, HIV protease inhibitors, and immunosuppressants. Drug interaction review is essential before starting rifampin. Liver injury, which can be severe enough to cause liver failure and death, is a key risk, and liver function monitoring is recommended. The label also warns about serious allergic reactions and severe skin reactions (including Stevens-Johnson syndrome and DRESS), thrombotic microangiopathy (small blood clots that damage the kidneys and blood cells, sometimes fatal), lung inflammation that can be fatal, bleeding problems from low vitamin K, and flares of porphyria. Rifampin must not be taken with certain HIV medicines (atazanavir, darunavir, fosamprenavir, saquinavir, tipranavir, cabotegravir, fostemsavir or lenacapavir), with praziquantel, or with lurasidone (a medicine for schizophrenia and bipolar disorder).
This is not a complete list of side effects. Talk to your doctor or pharmacist about what to expect and when to seek medical attention.
Taking Rifampin
For bartonellosis, rifampin is typically given 300 mg orally twice daily as part of a combination regimen (often with doxycycline or azithromycin). Duration varies from 2 weeks for uncomplicated infection to 3 to 6 months for endocarditis or neurobartonellosis. Should be taken on an empty stomach for best absorption. In the US, rifampin is now sold mainly as generics: brand-name Rifadin capsules have been discontinued, and Sanofi has stopped making Rifadin IV, temporarily importing a UK version during a shortage.
Availability and cost
Generic versions may be available at a lower cost. Ask your pharmacist.
Help paying for Rifadin
Pick your insurance to see which help fits. Drugmaker copay cards can't be used with Medicare, Medicaid or TRICARE; charity funds are the usual route there.
No drugmaker assistance program for this medicine is published on the maker's official pages.
Good to know: Rifampin is an older antibiotic sold as a low-cost generic by many manufacturers. There is no single manufacturer assistance program for it. Pharmacy discount programs or a pharmacist can help with cost.
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Common questions about Rifampin
▸What is Rifampin (Rifadin)?
A rifamycin antibiotic used in combination regimens for Bartonella infections, particularly for neurobartonellosis and endocarditis. Its ability to penetrate biofilms makes it relevant for chronic bartonellosis.
▸How does Rifampin work?
Rifampin inhibits bacterial DNA-dependent RNA polymerase, blocking RNA synthesis at the transcription level. It achieves high intracellular concentrations and can penetrate biofilm structures, which is why some practitioners include it in combination regimens for chronic Bartonella infections where biofilm persistence is suspected.
▸What are the side effects of Rifampin?
Rifampin turns body fluids (urine, tears, sweat) orange-red, which is harmless but can stain contact lenses and clothing. It is a potent CYP3A4 inducer and accelerates the metabolism of many drugs including oral contraceptives, warfarin, HIV protease inhibitors, and immunosuppressants. Drug interaction review is essential before starting rifampin. Liver injury, which can be severe enough to cause liver failure and death, is a key risk, and liver function monitoring is recommended. The label also warns about serious allergic reactions and severe skin reactions (including Stevens-Johnson syndrome and DRESS), thrombotic microangiopathy (small blood clots that damage the kidneys and blood cells, sometimes fatal), lung inflammation that can be fatal, bleeding problems from low vitamin K, and flares of porphyria. Rifampin must not be taken with certain HIV medicines (atazanavir, darunavir, fosamprenavir, saquinavir, tipranavir, cabotegravir, fostemsavir or lenacapavir), with praziquantel, or with lurasidone (a medicine for schizophrenia and bipolar disorder).
▸How is Rifampin taken?
For bartonellosis, rifampin is typically given 300 mg orally twice daily as part of a combination regimen (often with doxycycline or azithromycin). Duration varies from 2 weeks for uncomplicated infection to 3 to 6 months for endocarditis or neurobartonellosis. Should be taken on an empty stomach for best absorption. In the US, rifampin is now sold mainly as generics: brand-name Rifadin capsules have been discontinued, and Sanofi has stopped making Rifadin IV, temporarily importing a UK version during a shortage.
▸Is Rifampin FDA approved?
Yes, Rifampin (Rifadin) is FDA approved (1971) for the treatment of Bartonellosis.
▸What is rifampin used for in bartonellosis?
Rifampin is a rifamycin antibiotic used in combination regimens for Bartonella infections, particularly neurobartonellosis and endocarditis. It blocks bacterial RNA synthesis, reaches high concentrations inside cells, and can penetrate biofilms, which is why some practitioners include it for chronic bartonellosis where biofilm persistence is suspected.
▸How is rifampin dosed for bartonellosis?
For bartonellosis, rifampin is typically given as 300 mg orally twice daily, usually combined with doxycycline or azithromycin, and taken on an empty stomach for best absorption. Duration ranges from 2 weeks for uncomplicated infection to 3 to 6 months for endocarditis or neurobartonellosis. In the US it is now sold mainly as generics, since brand-name Rifadin capsules have been discontinued.
▸What are the side effects of rifampin?
Rifampin turns urine, tears, and sweat orange-red, which is harmless but can stain contact lenses and clothing. Liver injury that can progress to liver failure and death is a key risk, so liver function monitoring is recommended. The label also warns about serious allergic and skin reactions (Stevens-Johnson syndrome, DRESS), thrombotic microangiopathy, lung inflammation that can be fatal, bleeding problems from low vitamin K, and flares of porphyria.
▸What drugs interact with rifampin?
Rifampin is a potent CYP3A4 inducer that speeds up the metabolism of many drugs, including oral contraceptives, warfarin, HIV protease inhibitors, and immunosuppressants, so a drug interaction review is essential before starting it. It must not be taken with certain HIV medicines (atazanavir, darunavir, fosamprenavir, saquinavir, tipranavir, cabotegravir, fostemsavir, or lenacapavir), with praziquantel, or with lurasidone.