Effect of a pharmacist intervention in Spanish community pharmacies on blood pressure control in hypertensive patients

Abstract

Purpose: The effect of a protocol-based pharmacist intervention on blood pressure (BP) control among treated hypertensive patients who use community pharmacies was studied.

Methods: A quasi-experimental study with a control group was conducted at 13 community pharmacies in Jaén and Granada in Spain. Hypertensive patients over age 18 years who were receiving antihypertensive treatment were eligible for participation. The protocol-based intervention consisted of three components: (1) patient education about hypertension, (2) home blood pressure monitoring (HBPM), and (3) referral to a physician through personalized reports when necessary. The control group received the standard of care. BP control was assessed at the beginning and end of the study. Results Data were collected from 176 patients. In the intervention group (n = 87), significant baseline-to-endpoint reductions in systolic blood pressure (SBP) and diastolic blood pressure (DBP) were observed: 6.8 mm Hg (p < 0.001) and 2.1 mm Hg (p = 0.032), respectively. The changes in SBP and DBP in the intervention group at the end of the study were significantly greater than those in the control group (difference between adjusted mean change, 5.7 mm Hg for SBP [p = 0.001] and 2.6 mm Hg for DBP [p = 0.013]). The odds of achieving BP control in the intervention group was 2.46 times higher than in the control group (95% confidence interval, 1.15-5.24; p = 0.020).

Conclusion: A protocol-based community pharmacist intervention in combination with HBPM significantly reduced SBP and DBP and increased the percentage of patients with controlled BP compared with patients receiving the standard of care.