The following journal article compares the effectiveness of Rhythmic Engagement Therapy (RET) and Cognitive Behavioural Therapy (CBT) in managing relapse among individuals with substance use disorders. This research was conduct in Nigeria and the findings are published in the paper with guidance on intervention methods and experiment conduction processes. The study highlights the effectiveness and afforability of RETs, especially in low income countries with low funds for treatment. This document may be of interest to stakeholders who are interested in a comparison between RET and CBT, as well as the techniques used in conducting this research.