Pharmacovigilance in clinical trials involves a broad range of activities aimed at monitoring the safety of investigational drugs and ensuring the protection of human subjects. Pharmacovigilance is the science and activities related to the detection, assessment, understanding, and prevention of adverse effects or any other drug-related problems associated with the use of medicinal products. It involves the continuous monitoring and evaluation of the safety and efficacy of medicinal products throughout their lifecycle, from preclinical development to post-marketing surveillance.