Periodic Safety Update Reports (PSURs) are pharmacovigilance documents required from marketing authorization holders (MAHs) to evaluate the risk-benefit balance of medicinal products post-authorization. They must be submitted at specified intervals, based on EU regulations, using data from various sources to assess new safety information and overall safety evaluations. The PSUR must include sections such as executive summaries, worldwide marketing authorizations, patient exposure, and discussions about efficacy and safety findings.