How long does a patient typically need to take antituberculosis medications?

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Treating tuberculosis requires a long, multi-drug course to prevent resistance and to eradicate all bacteria, including those hidden in lesions. For drug-susceptible TB, the standard plan uses four drugs in the first two months, followed by two drugs for about four more months, totaling around six months. In many patients this duration is sufficient, but in some cases—such as slower response, certain extrapulmonary forms, or adherence concerns—the course may be extended to up to nine months. So the typical duration falls in the six-to-nine-month range.