Anger arousal is often known as an adaptive response to affective discomfort, which is represented by aggressive behaviors [
1] and can affect human relations. It is in fact a feeling observed before aggressive behaviors. Studies have shown that individuals with high levels of anger got involved in verbal and physical aggression [
2]. This might lead to aggressive behaviors towards family members and other individuals [
3]. The prevalence of aggression in a study by Nooripour et al., [
4] was reported to be 5% to 20%. Substance abuse and its consequences are among the most common health problems around the world [
5]. Therapists often believe that anger and aggression are associated with substance abuse. Investigations have also shown that 40% of cocaine consumers suffered from different levels of aggression [
6]. According to the World Health Organization, although law enforcement due to fear of punishment can have an impact on the behavior, change in beliefs that reduce aggression and crime requires more time and interventions [
7]. Such methods led to reverse results in some cases compared to interventional programs based on penalty and positive reinforcement among prisoners in a British camp. The results of that study indicated that the rate of crime recommitment was increased by focusing more on penalty [
8]. Research found that anger management has a positive effect on the prevention of offender behavior [
9]. In fact, benefitting from anger management skills led to an increase in individuals’ adjustment ability as well as psychological capability [
10]. Cognitive behavioral therapy is a method used for treating a large number of mental disorders. It basically focuses on recognizing incorrect, negative, and illogical beliefs affecting patients’ affection, behaviors, and belief reconstruction [
11]. The Patrick-Reilly approach is a cognitive behavioral approach based on a combination of cognitive interventions, relaxation, and communication skills. During therapeutic sessions based on Patrick-Reilly’s approach, different strategies are provided for controlling anger initiation and its consistency. In addition, some tasks are given to participants in order to guarantee learning. A number of these strategies include relaxation through respiration, progressive muscle relaxation, thought blocking, and assertion skills [
6]. Considering the importance of anger and aggression control among patients abusing substances, researcher’s experience about the frequency of aggression and physical conflicts between patients and nurses in psychiatric wards, and families’ concern about management of this misbehavior after their discharge, the present study aims to perform anger management group education based on Patrick Reilly’s cognitive behavioral therapy approach. The aim of the intervention is to provide participants with education according to evidence-based and scientific findings in ways that help them to gradually be able to control and manage their anger through simple strategies and skills.