Discontinuation of secondary prevention medication after myocardial infarction – the role of general practitioners and patients

Abstract

BACKGROUND: Despite the significant benefits of secondary prevention (SP) medication after acute myocardial infarction (MI), evidence suggests that these medications are neither consistently prescribed nor appropriately adhered to by patients. The aim of this study was to investigate the role of general practitioners (GPs) and patients regarding discontinuation of SP medication after MI and reasons for discontinuation. METHODS: In this observational study, GPs of patients who had suffered acute MI provided information on discontinuation of SP medication 6 and 12 months after hospital discharge. A questionnaire-based approach was used (a) to assess the consistent use of SP medication after MI, (b) to determine reasons for stopping SP medication, (c) to quantify the involvement of GPs and patients regarding discontinuation, and (d) to analyse potential factors that are associated with discontinuation of medication. RESULTS: Of 204 subjects 6 and 12 months after hospital discharge 83% and 75% patients, respectively, were still on recommended SP medication. Overall, one or more SP medications were stopped (53 medications) or modified (15 medications) in 52 (25%) patients. Adverse side effects were the main reason for stopping medication (63%). GPs reported being responsible for initiating discontinuation or modification more frequently than patients (62% vs 38%, p = 0.065). CONCLUSION: The consistent use of evidence-based pharmacotherapy 6 and 12 months after myocardial infarction was adequate. Three out of four patients were still on recommended SP medication after 1 year of follow-up. Two-thirds of medication discontinuations were initiated by GPs, predominantly because of side effects.

Keywords

• acute myocardial infarction
• evidence based medicine
• primary health care
• secondary prevention