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  • Most treatment regimens are comprised of some combination of four essential medicines designated as “first-line anti-TB drugs”:
    • Isoniazid (H)
    • Rifampicin (R)
    • Pyrazinamide (Z)
    • Ethambutol (E)

  • For patients with documented drug resistance, second-line drugs (SLD) will be used. See the section on MDR-TB treatment later in this section for information about SLD use and click here for basic SLD information.
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