Both impulsivity and NS seem to be related with craving and relapse. Particularly, NS3 may be related with relapse both directly and indirectly via craving, whereas NPI may be related with relapse only indirectly via craving. Thus severity of craving may be a final pathway to relapse in these relationships of NS3 and NPI with relapse. These findings suggest that impulsivity, NS and craving are important variables to predict outcome and also for the treatment plan.