Cognitive behavioural therapy (CBT) and relapse prevention (RP) techniques are used to treat substance abuse. CBT provides skills to help people initially stop using drugs and sustain abstinence through challenging dysfunctional thoughts and developing new coping behaviors. RP focuses on maintaining abstinence by preventing lapses from escalating into full relapses. Key CBT concepts include identifying triggers, high-risk situations, and cravings. Clinicians use functional analysis to understand a client's drug use patterns and teach strategies like urge surfing and thought stopping to cope with cravings without using. Role plays help clients learn and practice drug refusal and other skills to support lifestyle changes and abstinence.