Perioperative adverse drug event surveillance workflow. Patient demographic information and surgical information system extracts are processed by the computerized surveillance rules engine. When trigger logic is met, results are populated in the adverse drug event surveillance (ADE-S) database. Patient charts and electronic medical record information are reviewed daily by a designated perioperative clinical pharmacist who then documents the details of the ADE in a clinical narrative within the ADE-S database. These completed evaluations are reviewed and scored by another clinical pharmacist for both causality and severity. Reports are generated for clinically-relevant analysis and quality improvement purposes.