The OneVA Pharmacy application design consists of 3 main components: VistA Medication Profile screen, Health Data Record Clinical Data Service (HDR/CDS), and OneVA Pharmacy message flow. The VistA Medication Profile screen expands available pharmacy information in VistA to provide pharmacists direct access to query, and refill patients active and refillable prescriptions. The HDR/CDS provides a patients active and refillable prescriptions. The OneVA Pharmacy message flow enables the secure, bi-directional exchange of electronic health records between local/remote VistA Servers, and between VistA servers and HDR.