Effects of Medication Therapy Management by Pharmacist on Medication Adherence in Patients with Ischemic Heart Disease and Atrial Fibrillation

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Achara Chaiwong
Penkarn Kanjanarat

Abstract

Objective: To study the effect of Medication Therapy Management (MTM) by pharmacists on Medication Adherence (MA) and clinical outcomes including vital signs and control of international normalized ratio (INR) within target range among patients with ischemic heart disease and atrial fibrillation. Method: This quasi experimental study with a control group enrolled 60 eligible subjects chosen by purposive sampling. The subjects were allocated to two groups of 30 patients each. The experimental group (MTM group) received MTM services for 4 months, while the control group received standard services. Two MA measures were employed, namely pill count and the Medication Adherence Scale in Thais (MAST). The study compared differences between groups in terms of MA and clinical outcomes at month 4. Results: Both groups of subjects showed no differences in demographic variables, duration of disease, co-morbidity, and type of drugs taken (P>0.05). Means MA before study (month 0) as measured by pill count in control group and experimental group were not different (71.0%, 72.1%, respectively, P>0.05). At month 4, the MA assessed by pill count increased in both groups, with that in the MTM group significantly higher than that in the control group (90.6%, 86.0%, respectively, P<0.001). The result on MA measured by the MAST was consistent to that measured by pill count. The MTM group had a higher increase in proportion of patients with INR within target range and normal vital signs compared to that at the start of the study (P<0.05), but no differences were found when compared to that in the control group (P>0.05). Conclusion: Patients receiving MTM had a better MA at the 4th month compared to those receiving usual care. However, the clinical outcomes in the MTM group were not different from those in the control group.

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Research Articles

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