| Sumario: | Purpose Failure to obtain an accurate medication history can adversely affect patient care in the emergency department (ED) and propagate errors into the inpatient and outpatient settings. Obtaining an accurate medication history in the ED is challenging, however, due to limited time, a suboptimal environment for patient interaction, and inadequate information in the electronic health record (EHR). This article describes the development and initial evaluation of the PictureRx Medication History Application, a tablet computer-based program that queries patients' prescription fill data from the Surescripts Medication History service and renders it graphically for review and editing at the point of care. Methods A quasi-experimental trial of PictureRx was performed in a large academic ED. Adult patients taking at least 1 prescription medication were prospectively eligible for the intervention. Usual care control patients were retrospectively matched 1:1. The main outcomes were updates to the patients' existing pre-visit medication list in the EHR and patient perceptions of the application. Results The medication list was updated for 101/244 (41.4%) of the intervention group and for 43/244 (17.6%) of the control group (difference 23.8%, 95% confidence interval, 16.0–31.6%). Similar differences were observed for medication additions, removals, and corrections in dose. Approximately 80% of intervention patients "strongly agreed" that the application was easy to use, aided medication list accuracy, and the graphical features assisted with recall. Conclusion A novel tablet computer-based medication history application was feasible to implement in a busy academic ED. Use of the tool was associated with more updates to patients' EHR medication list.
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