Monitoring drug side effects is one of the clinical duties of pharmacists in the hospital. The pharmacist's knowledge, attitude and practice largely determine the quantity and quality of drug side effects reporting. This study aims to study the level of knowledge, attitudes and practices of hospital pharmacists about reporting of drug side effects monitoring in Bengkulu City, the barriers to doing so, and to examine the relationship between these three variables. This study is a quantitative descriptive study with a cross-sectional approach, and the sampling technique was purposive sampling. The research instrument is in the form of a validated questionnaire and is distributed through the social media application (WhatsApp). The number of respondents counted in this study was 42 people. The results obtained, pharmacists who have a good level of knowledge (50%), good attitude (92.9%) and adequate practice (61.9%). Factors inhibiting pharmacists from reporting drug side effects include the uncertain relationship between the reaction and its cause and the difficulty in determining whether to drug side effects has occurred or not. Statistical analysis between pharmacists' knowledge, attitudes and practices regarding monitoring of side effects showed that there was no significant relationship between the three variables (p >0.05)

Keywords : Drug Side Effects, Drug Side Effect Monitoring, Pharmacovigilance.