Preventing drug interactions by online prescription screening in community pharmacies and medical practices

Clinical Pharmacology and Therapeutics
H HalkinB B Malkin

Abstract

Drug interactions have been shown to be preventable by computerized prescription entry and screening only in hospitals and not in community-based practice. We retrospectively evaluated the effect of online prescription screening in community pharmacies and physician offices of one health maintenance organization, phased in during 3 consecutive 6-month periods in 1998 to 1999 (period I, system active only in 40% of pharmacies; period II, system active in 90% of pharmacies and 50% of physician offices; period III, system active in 95% of pharmacies and 90% of physician practices), on rates of prescriptions with-, patient exposure to-, and physician prescribing of-potential drug interactions. Cumulative data included 775,186 patients given at least one prescription, by one or more of 5504 physicians, whose prescriptions were dispensed at 572 pharmacies. Dispensing of drug interaction prescriptions was reduced by 21.1% and by 67.5% in periods II and III compared with period I (odds ratio, 0.79; 95% confidence limit, 0.75-0.83 and odds ratio, 0.28; 95% confidence limit, 0.26-0.30, respectively). Patient exposure decreased only in those receiving 3 to 7 concurrent drugs (odds ratio, 0.80; 95% confidence limit, 0.71-0.90) with no redu...Continue Reading

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