Table 2.

Group A, B and C drugs: design and steps of longer treatment regimen for drug-resistant tuberculosis according WHO classification (initially at least four active drugs, if Bdq is stopped after 6 months, continue at least three active drugs)

Group	Medicine	Abbreviation
A Include all three drugs	Levofloxacin or moxifloxacin Bedaquiline Linezolid	Lfx Mfx Bdq Lzd
B Add one or both	Clofazimine Cycloserin or terizidone	Cfz Cs Trd
C Add to complete the regimen, or when drugs from group A or B cannot be used	Ethambutol Delamanid Pyrazinamide Imipenem-Cilastin or meropenem Amikacin or (streptomycin) Ethionamide or prothionamide P-amino salicylic acid	E Dlm Z Ipm-Cln Mpm Am (S) Eto Pto PAS

Adapted from WHO operational handbook on tuberculosis; Module 4; drug-resistant tuberculosis [38].