This document discusses periodic safety update reports (PSURs), which are required to be submitted regularly to regulatory agencies to evaluate the benefit-risk profile of medicines on the market. It provides answers to commonly asked questions about PSUR requirements, timing of submissions, and what the regulatory agency does with the submitted reports. Key points covered include that PSURs are due annually for 3 years from approval, have a 90 day submission window after the data lock point, and are reviewed for safety changes, new signals, and significant new safety information. Contact information is provided for questions.