Pharmacovigilance involves collecting data on adverse drug reactions to monitor drug safety. Data is used for signal generation and strengthening, drug regulation, and education. It applies to national drug policy, clinical regulation, practice, and public health programs. The WHO program collects international data in Vigibase, the largest database, to identify safety signals and advise authorities. Future prospects include e-health solutions, standardized systems connected to medical records, and a publicly accessible global safety database.