What is the recommended approach to reintroducing TB drugs after hepatotoxicity improves?

• A. Reintroduce drugs one by one after improvement.
• B. Reintroduce all drugs at once after improvement.
• C. Do not restart therapy.
• D. Switch to non-TB antibiotics.

Answer: (A)

After hepatotoxicity resolves, the safest way to restart TB therapy is to reintroduce the drugs one by one, with careful monitoring. This staged approach lets you restart treatment while watching for any return of liver injury and helps identify the specific drug that caused the toxicity. Begin with the drug that has the lowest potential to affect the liver, then add the next one only after liver function tests have normalized and there are no symptoms. Continue this process until the full first‑line regimen is back on board if tolerated.

This method matters because TB treatment relies on a combination of drugs to prevent resistance and ensure effective cure. Restarting all drugs at once could trigger a recurrence of liver injury, while stopping therapy entirely would jeopardize TB control. Switching to non-TB antibiotics would fail to treat the infection and could allow resistance to develop. Monitoring liver tests and symptoms during the reintroduction helps keep the patient safe while maintaining as complete a regimen as possible.