SHRZ6HE This is a common regimen

The initial phase is 2SHRZ. The duration of the phase is 2 months. Drug treatment is daily (no subscript number after the letters), with streptomycin (S), isoniazid (H), rifampicin (R) and pyrazinamide (Z). The continuation phase is 6HE. The duration of the phase is 6 months. Drug treatment is daily, with isoniazid (H) and ethambutol (E).

2SHRZ/4H3R3. In some countries, resources are available to provide rifampicin in the continuation phase as well as in the initial phase. The initial phase is 2SHRZ,the same as in the first example. The continuation phase is 4H3R3.The duration is 4 months, with isoniazid and rifampicin three times per week (subscript number 3 after the letters).

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