Rifampicin

Rifampicin (INN) ( /rɪˈfæmpəsɪn/) or rifampin (USAN) is a bactericidal antibiotic drug of the rifamycin group. It is a semisynthetic compound derived from Amycolatopsis rifamycinica (formerly known as Amycolatopsis mediterranei and Streptomyces mediterranei). Rifampicin may be abbreviated R, RMP, RA, RF, or RIF (US).