The duration of rifampin therapy for tuberculosis can extend to which time frame?

• A. It lasts indefinitely
• B. It is finished within 2 weeks
• C. It may last up to a year
• D. It lasts for 3 days

Answer: (C)

The idea being tested is that TB treatment duration is not the same for every patient; it depends on where the disease is and how well the patient responds. Rifampin is used throughout the whole course, but some forms of TB require a longer total duration to ensure the infection is fully cleared and to prevent relapse. While many drug-susceptible TB cases are treated for about six months, guidelines allow extending therapy to nine or even twelve months for certain sites such as TB meningitis or skeletal/extrapulmonary TB. So saying it may last up to a year captures these longer regimens that are used in specific situations to achieve complete cure.