 Analysis plan Both the efficacy analysis and intent to treat analysis will be undertaken. The primary approach will be intent to treat analysis ITT accounting for all patients randomized to study regimen and considering drop outs, deaths and defaulters as unfavourable outcomes. However, Primary MDR -TB will be excluded as an unfavourable response from the ITT analysis despite allocation to study regimen. Efficacy analysis will include only patients who had consumed at least 80 of the scheduled therapy of ATT. Patients who die within 15 days of starting ATT, and NON-TB deaths during assessment and treatment will not be considered for the efficacy analysis of ATT. Patients who have died during treatment and their cultures grow M.Tb retrospectively will be included as bacteriological failures taking the first event as the outcome. Kaplan Meier survival curves will be constructed and comparison will be done using Log-rank test. To identify the important co-variates in relation to response and toxicity, Cox-regression model will be used. Frailty model will be used to account for individual heterogeneity. 