Dataset which analysis aims to assess the effects of Mindfulness-Based Relapse Prevention protocol (MBRP) on the expression of anger in men that were being treated as inpatients for SUD. We randomized 223 inpatients from the therapeutic community, allocated to MBRP or Treatment as Usual. They were assessed by the FFMQ-SF-BR and STAXI-2, with analyses by Generalized Estimated Equations and Macro PROCESS.