National evaluation of adherence to β-blocker therapy for 1 year after acute myocardial infarction in patients with commercial health insurance

In a population of patients with health insurance and prescription drug coverage, adherence to β-blocker therapy in the first year after myocardial infarction is poor, indicating that factors other than medication cost are important determinants of long-term adherence. Quality improvement initiatives focused on long-term adherence are needed to realize maximal benefit from medical therapy in post-myocardial infarction patients.