Methods
Veterans receiving care at VASNHS aged ≥ 65 years with ≥ 10 active medications noted in CPRS were included in this project. PACT pharmacists and physicians were educated on the proper use of the VIONE tool prior to its implementation. Education included a 15-minute slide presentation followed by dissemination of a 1-page VIONE tool handout during a PACT all-staff clinic meeting.
Data were collected for 3 months before and after the intervention. Data were made available for assessment by the Automated Data Processing Application Coordinator (ADPAC) at VASNHS. The ADPAC created and generated an Excel spreadsheet report, which listed all medications deprescribed using the VIONE method. The primary endpoint was the total number of medications discontinued using the VIONE template and/or discontinuation menu. For the purpose of this project, appropriate discontinuation was considered any prescription deprescribed, excluding medical supplies, by pharmacists and PCPs who received VIONE education.
The secondary endpoint was the estimated annualized cost avoidance for the facility (Figure). The calculation does not include medications discontinued due to the prescription of an alternative medication or dose decreases since these VIONE selections imply that a new prescription or order was placed and the original prescription was not deprescribed. Annualized cost avoidance was determined with use of the VIONE dashboard, a database that retrospectively gathers information regarding patients at risk of polypharmacy, polypharmacy-related ADEs, and cost. Manual adjustments were made to various parameters on the Veterans Integrated Service Network 15 VIONE dashboard by the author in order to obtain data specific to this project. These parameters allowed selection of service sections, specific staff members or the option to include or exclude chronic or nonchronic medications. The annualized cost avoidance figure was then compared to raw data pulled by a VIONE dashboard correspondent to ensure the manual calculation was accurate. Finally, the 5 most common classes of medications deprescribed were identified for information purposes and to provide a better postulation on the types of medications being discontinued using the VIONE method.
Results
A total of 2,442 veterans met inclusion criteria, and the VIONE method was applied to 598 between late October 2018 and January 2019. The 13 PACT pharmacists contacted at least 10 veterans each, thus at least 130 were randomly selected for telephone calls to perform polypharmacy reviews using the VIONE note template. The discontinuation menu was used if a medication qualified to be deprescribed. After 3 months, 1986 prescriptions were deprescribed using VIONE; however, 1060 prescriptions were considered appropriately deprescribed (Table 2). The 13 PACT pharmacists deprescribed 361 medications, and the 29 PACT physicians deprescribed 699 medications. These prescriptions were then separated into medication categories to determine the most common discontinued classes. Vitamins and supplements were the medication class most frequently deprescribed (19.4%), followed by pain medications (15.5%), antimicrobial agents (9.6%), antihypertensive medications (9.2%), and diabetes medications (6.4%) (Table 3). The top 5 medication categories accounted for 60% of all medications appropriately deprescribed.
The estimated annualized cost avoidance for all medications deprescribed in the 3-month project period was $84,030.46. To provide the most appropriate and accurate calculation, medication classes excluded from this figure were acute or short-term prescriptions and antimicrobial agents. Medications prescribed short-term typically are not suitable to continue for an extended period, and antimicrobial agents were excluded since they are normally associated with higher costs, and may overestimate the cost avoidance calculation for the facility.