Abstract
To describe a formulary antiulcer agent prescribing program developed as the result of a drug use evaluation (DUE). Program implementation, methods, cost impact, and results of a follow-up DUE are provided. The institution is a 51,000-bed correctional system consisting of 40 separate units each containing an ambulatory care clinic. Medication orders are transmitted via mainframe computer system to one of four pharmacies, which collectively dispense an average of 4000 medication orders (30 days' supply) per day. Results from the antiulcer agent (cimetidine, ranitidine, sucralfate) DUE revealed that the agents studied were prescribed in dosages and durations exceeding criteria developed by the Pharmacy and Therapeutics Committee. A program designed to reduce dosages to maintenance therapy after eight weeks at treatment dosage was developed by the Pharmacy and Therapeutics Committee with staff physician input. Antiulcer agent use and expenditures were followed and a follow-up DUE was completed seven months after program implementation. Antacid use and frequency of upper gastrointestinal studies that were ordered were followed. The follow-up DUE showed the mean daily dosage for prescribed histamine2-receptor antagonists decreased (cimetidine from 694 to 454 mg, ranitidine from 280 to 183 mg) and the mean duration of therapy decreased from 14 to 10 months. The percentage of patients with potentially significant drug interactions decreased from 14.2 to 6.5 percent. The mean number of antiulcer agents dosage units dispensed per month decreased by 24,461 units, resulting in a projected annual savings of $327,273. There were no identifiable clinically important changes in the use of antacid products or prescribing of upper gastrointestinal studies. A cost-savings program sponsored by the pharmacy and therapeutics committee decreased costs, corrected prescribing to more closely meet preset criteria, and produced no discernable unfavorable effect on patient care.
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