Introduction: Adverse Drug Reaction (ADR) reporting is essential to ensure safe use of medication. Objective: To assess community pharmacists’ knowledge, behaviours and practice of ADR reporting in Lagos State. Methods: This was a cross-sectional survey using self-administered questionnaire distributed to randomly selected pharmacists in retail community pharmacies in Lagos State. The instrument is a 62 item structured questionnaire in four sections; the demographics, knowledge about ADR reporting system, assessment of practice and attitude on ADR reporting; and the behavior and practice of patients counseling about ADR by community pharmacists. Data analysis was done with Statistical Package for the Social Sciences (SPSS) version 20. Results: Majority (31.9%) of the respondents have practiced in community pharmacies for less than 5 years, 62.7% of the community pharmacists were familiar with adverse drug reaction reporting. 57.8% of the pharmacists have internet facility in their pharmacies and 79.4% of the respondents were aware that community pharmacists can submit adverse drug reactions online. In the preceding months, 78.4% of the pharmacists had encountered many serious ADR but only 27.0% reported them. The reasons for underreporting of ADR included uncertainty about causality (52.0%), respondents not sure of which ADR to report (38.2%), no access to reporting forms (33.8%), ignorance of the rule of reporting (30.4%), and complexity of the reporting forms (16.2%). Conclusion: There is low reporting of adverse drug reactions by community pharmacists attributable to insufficient knowledge and high level of untrained community pharmacists in pharmacovigilance and adverse drug reactions reporting.
Key words: Adverse drug reaction (ADR); Community pharmacists; Pharmacovigilance; Reporting.