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.