Pennsylvania Patient Safety Authority analysts identified 501 reports involving breakdowns in the medication reconciliation process with event dates between November 1, 2011, and November 31, 2012. Analysts reviewed these reports to classify the events by type of reconciliation, event type, and possible causes and contributing factors. The majority of events occurred during admission medication reconciliation (69.3%, n = 347). Events most often originated during prescribing (40.3%, n = 202) and transcribing (26.9%, n = 135). Drug omission was the most frequently reported (26.7%, n = 134) event type overall. Other top event types included wrong dose and additional drug or dose. Important risk reduction strategies include standardizing processes, clearly defining the roles and responsibilities of staff involved in the medication reconciliation process, using a standardized medication reconciliation form with a scripted list of questions or prompts, and engaging patients when obtaining their history and determining treatment.
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