Effectiveness and acceptability of community pharmacy-based interventions in type 2 diabetes: a critical review of intervention design, pharmacist and patient perspectives

Abstract

Objective It is generally accepted that greater use could be made of community pharmacy-based interventions. Diabetes care has been proposed as an area for enhanced community pharmacy involvement. However there is no published structured review of available evidence of either effectiveness or acceptability. This review aims to identify and assess such evidence and to synthesise findings to inform the design and delivery of future community pharmacy-based interventions in diabetes care. Method A systematic search of published literature was conducted using a defined search strategy, electronic databases and targeted hand searching of non Index Medicus journals. The search dates were 1990-2003. The scope was international and we included only articles in the English language. Key findings Seven experimental studies which tested community pharmacy-based interventions were reviewed. Four different primary outcomes were studied: diabetes control (three studies), adherence (two studies), medication problems (one study) and patient knowledge (one study). Six studies showed positive outcomes, and the findings were statistically significant in two. The theoretical basis of the interventions was unclear. Only one study included a cost-effectiveness analysis, and the interventions were provided free of charge to patients in all seven studies. Nine attitudinal studies were included, five involving pharmacists and four with patients. Members of the public do not currently expect community pharmacists to become involved in discussions about diabetes treatment and its monitoring, but when such services are offered they are well used by patients. Pharmacists were positive about the provision of services for people with diabetes. Patients' experiences indicated that community pharmacists overestimate their current provision of information and advice to people with diabetes. Conclusions There is limited evidence of effectiveness of community pharmacy-based interventions in diabetes care. Components of pharmacy-based intervention which appear to contribute to effectiveness include: elicitation and discussion of patient beliefs about their diabetes and its treatment; discussion of how patients are using their medicines; review of haemoglobin A 1c (HbA 1c) levels; and assessing and supporting necessary lifestyle changes. Further research is needed and future interventions need to incorporate evidence from the literature on patient and pharmacist perspectives on diabetes. The findings of this review will be useful to researchers and service planners involved in developing community pharmacy-based diabetes care.