Which drugs make up the standard intensive-phase treatment of drug-susceptible pulmonary tuberculosis?
Answer and explanation
Correct answer: C. Isoniazid, rifampicin, pyrazinamide and ethambutol for two months
- Step 1: The standard WHO regimen has an intensive phase of two months with four drugs. Step 2. It is followed by a continuation phase of isoniazid and rifampicin. Answer: Isoniazid, rifampicin, pyrazinamide and ethambutol. Why not the others: Two drugs risk resistance and relapse. Streptomycin is a second-line injectable. Ethambutol is part of the first two months, not a rescue drug.
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