Objective:The primary objective of this study was to evaluate the knowledge, attitude, and practices (KAP) of the healthcare professionals about pharmacovigilance in Dhanalakshmi Srinivasan Medical College and Hospital (DSMCH), Perambalur (Tamil Nadu), a tertiary care teaching hospital. The second primary objective was to assess the causation of underreporting of adverse drug reactions (ADRs) as it needs to be well-assessed in India. The secondary objective was to compare the findings of this study with the results of the published studies from India on evaluation of the KAP of pharmacovigilance among healthcare professional.Materials and Methods:A cross-sectional study was carried out using a pretested questionnaire. The questionnaire was designed to assess the KAP regarding pharmacovigilance. The healthcare professionals (doctors, nurses, and pharmacists) working in the DSMCH, Perambalur (Tamil Nadu) during the study period were included. Only those who gave their consent to participate were included in the study. The data was analyzed by using the Statistical Package for Social Sciences (SPSS) statistical software, version 16.Results:One hundred and fifty pretested questionnaires were distributed among the healthcare professionals and 101 responded. 62.4% healthcare workers gave correct response regarding the definition of pharmacovigilance. 75.2% of healthcare workers were aware regarding the existence of a National Pharmacovigilance Program of India. 69.3% healthcare professional agreed that ADR reporting is a professional obligation for them. Among the participants, 64.4% have experienced ADRs in patients, but only 22.8% have ever reported ADR to pharmacovigilance center. Unfortunately only 53.5% healthcare workers have been trained for reporting adverse reactions. But, 97% healthcare professionals agreed that reporting of ADR is necessary and 92.1% were of the view that pharmacovigilance should be taught in detail to healthcare professional.Conclusion:This study demonstrated that knowledge and attitude towards pharmacovigilance is gradually improving among healthcare professionals, but unfortunately the actual practice of ADR reporting is still deficient among them.