Rifadin

Rifampicin, also known as rifampin, is an antibiotic used to treat several types of bacterial infections, including tuberculosis (TB), Mycobacterium avium complex, leprosy, and Legionnaires’ disease.[2] It is almost always used together with other antibiotics with two notable exceptions: when given as a "preferred treatment that is strongly recommended"[3] for latent TB infection; and when used as post-exposure prophylaxis to prevent Haemophilus influenza... [wikipedia]