Iranian Pharmacovigilance Center reported on pharmacovigilance activities in Iran and managing medication errors. They found that 16.8% of 370 patients experienced adverse drug reactions, with 58.8% of reactions being preventable. Preventable adverse drug reactions were more severe and led to longer hospitalizations than nonpreventable reactions. The number of reported adverse drug reactions and reports from hospitals increased after interventions by manufacturers to monitor safety and submit periodic safety update reports to Iranian regulatory authorities.