This study assess Substance uses and its contributory factors among Tertiary Institution Undergraduates in Lagos State, Nigeria. This research which adopted descriptive design was conducted in two Universities within Lagos State, Lagos State University and University of Lagos. Data was collected from a total number of 416 undergraduates, selected from the two Universities using multi-stage sampling techniques. This study adopted a validated questionnaire as the instrument for data collection from the respondents. The data obtained from the respondents was analyses using SPSS version 27. Findings revealed that, most of the respondents were 23 years and below (98.6%), with more male (63.7%) than female (36.3%). Furthermore, majority of the respondents were found to be substance users (61.5%), with only a quarter found to be substance abusers (26.2%). Findings also revealed that, a considerable rate of respondents who use substances were influence by their family background (60.1%) and level of socialization (84.6%). The study also concluded that, family background factors as well as level of socialization among undergraduate being a major contributor to abuse of substances.
Keywords: Factors, contributory, substance use, undergraduates, university
