Which of the following drugs is NOT part of the initial four-drug TB regimen?

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Multiple Choice

Which of the following drugs is NOT part of the initial four-drug TB regimen?

Explanation:
The initial intensive therapy for drug-susceptible TB uses four first-line drugs taken together to rapidly kill bacteria and prevent resistance. Those drugs are rifampin, isoniazid, pyrazinamide, and ethambutol. Streptomycin isn’t part of this standard four-drug regimen because it’s an injectable aminoglycoside with higher toxicity risks (ear and kidney toxicity) and is generally reserved for specific situations or as a second-line option when the first-line drugs can’t be used. So streptomycin is not included in the initial four-drug TB regimen.

The initial intensive therapy for drug-susceptible TB uses four first-line drugs taken together to rapidly kill bacteria and prevent resistance. Those drugs are rifampin, isoniazid, pyrazinamide, and ethambutol. Streptomycin isn’t part of this standard four-drug regimen because it’s an injectable aminoglycoside with higher toxicity risks (ear and kidney toxicity) and is generally reserved for specific situations or as a second-line option when the first-line drugs can’t be used. So streptomycin is not included in the initial four-drug TB regimen.

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