Rifampicin is an antibiotic commonly used to treat bacterial infections, particularly those caused by Mycobacterium tuberculosis, the bacteria responsible for tuberculosis. It works by inhibiting the bacteria's ability to produce RNA, which is essential for their growth and reproduction. This medication is often part of a combination therapy to prevent the development of drug-resistant strains of bacteria. While effective, rifampicin can cause side effects such as liver issues and changes in urine color. Regular monitoring is recommended during treatment to ensure safety and effectiveness.