Rifabutin (Rfb) is an antibiotic used to treat tuberculosis and prevent and treat Mycobacterium avium complex.[1] It is typically only used in those who cannot tolerate rifampin such as people with HIV/AIDS on antiretrovirals.[1] For active tuberculosis it is used with other antimycobacterial medications.[1] For latent tuberculosis it may be used by itself when the exposure was with drug-resistant TB.[1]
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| Trade names | Mycobutin[1] |
| AHFS/Drugs.com | Monograph |
| MedlinePlus | a693009 |
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| Routes of administration | By mouth |
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| Pharmacokinetic data | |
| Bioavailability | 85% |
| Protein binding | 85% |
| Metabolism | Liver |
| Elimination half-life | 28 to 62 hours (mean) |
| Excretion | Kidney and fecal |
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| ECHA InfoCard | 100.133.627 |
| Chemical and physical data | |
| Formula | C46H62N4O11 |
| Molar mass | 847.019 g·mol−1 |
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Rifabutin was approved for medical use in the United States in 1992.[1] It is on the World Health Organization's List of Essential Medicines.[3]
Medical uses
editRifabutin is now recommended as first-line treatment for tuberculosis (TB),[4] but rifampicin was used more widely because of its cheaper cost. However, due to the expiration of patents, prices are now similar.
Adverse effects
editCommon side effects include abdominal pain, nausea, rash, headache, and low blood neutrophil levels.[1] Other side effects include muscles pains and uveitis.,[1] especially when hitting Bartonella and Babesia colonies in the capillaries of the ciliary body in the eye anterior chamber. While no harms have been found during pregnancy it has not been well studied in this population.[1] Rifabutin is in the rifamycin family of medications.[1] It works by blocking RNA production in bacteria.[5]
History
editScientists at the Italian drug company Achifar discovered rifabutin in 1975. (Eventually Archifar became part of Farmitalia Carlo Erba, a unit of the conglomerate Montedison which was subsequently bought by Pharmacia) This company's Adria Laboratories subsidiary filed for Food and Drug Administration (FDA) approval of rifabutin under the brand name Mycobutin in the early 1990s and the drug gained FDA approval in December 1992.[citation needed]
Rifabutin is primarily bactericidal antibiotic drug used to treat tuberculosis. Its effect on bacteria is based on the DNA-dependent RNA polymerase blocking drug rifamycin S, a semi-synthetic derivative. It is effective, for example, in highly resistant mycobacteria, Gram-positive bacteria (and some are effective against Gram-negative bacteria), but also against Mycobacterium tuberculosis, M. leprae, and M. avium intracellulare.[citation needed]
References
edit- ^ a b c d e f g h i j "Rifabutin". The American Society of Health-System Pharmacists. Archived from the original on 20 December 2016. Retrieved 8 December 2016.
- ^ "Product monograph brand safety updates". Health Canada. February 2024. Retrieved 24 March 2024.
- ^ World Health Organization (2019). World Health Organization model list of essential medicines: 21st list 2019. Geneva: World Health Organization. hdl:10665/325771. WHO/MVP/EMP/IAU/2019.06. License: CC BY-NC-SA 3.0 IGO.
- ^ Guidelines for the programmatic management of drug-resistant tuberculosis: emergency update 2008 (WHO/HTM/TB/2008.402). Geneva, Switzerland: World Health Organization. 2008. p. ix. ISBN 978-92-4-154758-1. Archived from the original on 2008-10-18.
- ^ Rockwood N, Cerrone M, Barber M, Hill AM, Pozniak AL (July 2019). "Global access of rifabutin for the treatment of tuberculosis - why should we prioritize this?". Journal of the International AIDS Society. 22 (7): e25333. doi:10.1002/jia2.25333. PMC 6637439. PMID 31318176.
Rifabutin is a rifamycin, which like rifampicin, works via inhibition of DNA‐dependent RNA synthesis in prokaryotes.
