This app is meant for physicians (MBBS or above). The content is based on Standard Treatment Guidelines in Substance use disorders. Medicine is an ever-changing science. As new research and clinical experience broaden our knowledge changes in treatment and drug therapy are required. The authors and the publisher of this work have checked with sources believed to be reliable in their efforts to provide information that is complete and generally in accord with the standards accepted at the time of publication of this app. Physicians (users of the app) are advised to use their clinical judgment and best practices and accordingly apply the knowledge.