Objective: To assess the feasibility of a pharmacist-based medication therapy management (MTM) service for North Carolina State Health Plan enrollees.
Design: Before/after design with two control groups.
Setting: Community pharmacies and an ambulatory care clinic in North Carolina serving patients from October 2004 to March 2005.
Participants: 67 patients who used a large number of prescription drugs, 10 community/ambulatory care pharmacists, and more than 600 participants from two control groups.
Interventions: Pharmacist-conducted MTM reviews for volunteering patients.
Main outcome measures: Process measures (type and frequency of drug therapy problems detected and services performed), economic measures (number and cost of medications dispensed), and humanistic measures (patient satisfaction with services).
Results: Pharmacists identified an average of 3.6 potential drug therapy problems (PDTPs) per patient at the first visit. The most common PDTP categories were "potential underuse" and "more cost-effective drug available." Pharmacist actions were divided nearly equally between activities that would result in increased and decreased drug use. Pharmacists recommended a drug therapy change in about 50% of patients and contacted the prescriber more than 85% of the time. About 50% of patients with PDTPs had a change in drug therapy. Prescription use during the postintervention period decreased in both the study and control groups but was statistically significant only among the control groups. No significant differences were observed in patient co-payment or insurer prescription costs. Pharmacists provided the following educational services: medication use (90%), disease management (88%), adherence, and self-care (60%). Survey results indicated that patients highly valued the service.
Conclusion: A voluntary MTM program targeted at ambulatory patients using a large number of medications reduced the number of PDTPs but did not necessarily result in reductions in prescription drug use or cost. Nearly all patients received some form of medication adherence or disease education associated with problem detection and resolution. Patient satisfaction levels with the service were very high.