all 4 had the same initial 2-month intensive phase of streptomycin , isoniazid , rifampicin and pyrazinamide ( shrz ) followed by isoniazid plus rifampicin for 4 months ( 4hr ) , or isoniazid plus pyrazinamide for 4 months ( 4hz ) , or isoniazid alone for 4 months ( 4h ) , or isoniazid alone for 6 months ( 6h ) .
C0358905
isoniazid
C0022209
plus