Substance use disorders (SUD) are a significant health concern worldwide. Substance abuse is a persistent problem linked to high rates of illness and loss. These issues are also responsible for many healthcare workers and health bills. However, the Substance use problems are associated with capitalize health retrogradation, weakness and death due to impacts and exceed. Throughout Iraq, there is growing concern about the effects of violence and war on drug use. To see how effective HBM-based intervention is at changing college students' health beliefs about drug usage. Using a randomized controlled trial approach, experimental design is carried out throughout the current study to determine the efficacy of health beliefs model-based intervention in changing the belief related to substance use among university students in Mosul City from 26-November 2019 to 1-March 2021. The study sample consisted of 80 students who participated in the training program for behavioral change. The intervention for the experimental group involved a health education lecture about substance use. Analyzed data using SPSS, Version 23 using both descriptive statistics and inferential statistics (Means, SD, Number and percentage). These results revealed statistically significant differences among all concepts of the Health Belief Model related to substance use, adding to behavioral motivation, behavioral control and intention) overtime.
On the contrary, the perceived barrier was the only belief that showed no significant changes over time. According to the findings, the design of an HBM-based study could impact students' cognition and conduct in the field of drug dependence. Given the positive association across HBM dimensions and pupils' opinions, notably in "significant advantages and regarded harshness," These beliefs seemed to have a strong connection to each other and the avoidance of alcoholism.
Keywords: Efficacy, Health Beliefs Model, Belief, Substance Use, Students.