Antitubercular drugs are used to treat tuberculosis (TB), which iscaused by Mycobacterium tuberculosis. Not always curative, these drugs can halt the progression of a mycobacterial infection.
These drugs also are effective against less common mycobacterial infections caused by M. kansasii, M. avium-intracellulare,M. fortuitum, and related organisms.
Unlike most antibiotics, antitubercular drugs may need to be ad-ministered over many months. This creates problems, such as pa-tient noncompliance, the development of bacterial resistance, and drug toxicity. (See Directly observable therapy for TB)