Determining the Correlation between Using Substances, Alcohol, Neuropsychiatric Drugs, and Smoking with Students Academic Achievement (Case Study of Students in Tehran Islamic Azad University, Central Branch)

Substance use is one of the most serious human problems in recent years and the most complex human phenomenon. Drug abuse and addiction is a chronic condition causing physical, family, economic, and social harm. This study was aimed at determining the correlation between using substances, alcohol, neuropsychiatric drugs, and smoking with studentschr('39') academic achievement (case study of students in Tehran Islamic Azad University, Central Branch) in the academic years 2020-2021. This study was a descriptive-correlational one in which 740 people were selected by simple random sampling among the eligible students according to the sample size formula. SPSS software, version 17 was used for data analysis. The findings of the present study showed that academic achievement of students who used substances, alcohol, cigarette and neuropsychiatric drugs was significantly lower than other students. Statistical t-test results also confirmed these findings.