Improving Medication Adherence in Patients with Hypertension: A Randomized Trial |
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Authors: | Ulla Hedegaard Lene Juel Kjeldsen Anton Pottegård Jan Erik Henriksen Jess Lambrechtsen Jørgen Hangaard Jesper Hallas |
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Institution: | 1. Clinical Pharmacology, Department of Public Health, University of Southern Denmark, Odense, Denmark;2. Clinical Pharmacy Department, Hospital Pharmacy of Funen, Odense University Hospital, Odense, Denmark;3. The Danish Research Unit for Hospital Pharmacy, Copenhagen, Denmark;4. Department of Endocrinology, Odense University Hospital, Odense, Denmark;5. Department of Internal Medicine, Odense University Hospital - Svendborg, Svendborg, Denmark |
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Abstract: | Background and PurposeIn patients with hypertension, medication adherence is often suboptimal, thereby increasing the risk of ischemic heart disease and stroke. In a randomized trial, we investigated the effectiveness of a multifaceted pharmacist intervention in a hospital setting to improve medication adherence in hypertensive patients. Motivational interviewing was a key element of the intervention.MethodsPatients (n = 532) were recruited from 3 hospital outpatient clinics and randomized to usual care or a 6-month pharmacist intervention comprising collaborative care, medication review, and tailored adherence counseling including motivational interviewing and telephone follow-ups. The primary outcome was composite medication possession ratio (MPR) to antihypertensive and lipid-lowering agents, at 1-year follow-up, assessed by analyzing pharmacy records. Secondary outcomes at 12 months included persistence to medications, blood pressure, hospital admission, and a combined clinical endpoint of cardiovascular death, stroke, or acute myocardial infarction.ResultsAt 12 months, 20.3% of the patients in the intervention group (n = 231) were nonadherent (MPR <0.80), compared with 30.2% in the control group (n = 285) (risk difference −9.8; 95% confidence interval CI], −17.3, −2.4) and median MPR (interquartile range) was 0.93 (0.82-0.99) and 0.91 (0.76-0.98), respectively, P = .02. The combined clinical endpoint was reached by 1.3% in the intervention group and 3.1% in the control group (relative risk 0.41; 95% CI, 0.11-1.50). No significant differences were found for persistence, blood pressure, or hospital admission.ConclusionsA multifaceted pharmacist intervention in a hospital setting led to a sustained improvement in medication adherence for patients with hypertension. The intervention had no significant impact on blood pressure and secondary clinical outcomes. |
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Keywords: | Hospital Hospital outpatient clinic Hypertension Medication adherence Motivational interviewing Pharmacy services |
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