How Tuberculosis Medications Work

Tuberculosis (TB) is a bacterial infection caused by Mycobacterium tuberculosis. The gold standard treatment for TB involves the use of two first-line anti-TB drugs: Isoniazid (INH) and Rifampicin.

Gold Standard Treatment: Isoniazid (INH) and Rifampicin

• Isoniazid (INH): INH works by inhibiting the synthesis of mycolic acid, a key component of the bacterial cell wall. This leads to the death of the bacteria.

• Rifampicin: Rifampicin inhibits RNA synthesis in the bacteria, preventing them from reproducing and ultimately leading to their death.

Alternative Treatments: Second-line Anti-TB Drugs

If the gold standard treatment is not effective or if resistance develops, alternative treatments may be used. These include:

• Ethambutol: Ethambutol inhibits cell wall synthesis in the bacteria.

• Pyrazinamide: Pyrazinamide is active against dormant TB bacteria and helps to prevent relapse.

• Cycloserine: Cycloserine works by inhibiting cell wall synthesis and protein synthesis in the bacteria.

It's worth noting that these alternative treatments may have more side effects and require closer monitoring than the gold standard treatment. A thorough diagnostic workup, including sputum smear microscopy, chest X-ray, and culture and drug susceptibility testing (DST), is essential to determine the best course of treatment for each patient.