Patient adherence to generic versus brand statin therapy after acute myocardial infarction: Insights from the Can Rapid Stratification of Unstable Angina Patients Suppress Adverse Outcomes with Early Implementation of the American College of Cardiology/American Heart Association Guidelines Registry.

Published

Journal Article

BACKGROUND: Statins reduce mortality after acute myocardial infarction, but up to half of patients discontinue statin use within 1 year of therapy initiation. Although cost may influence medication adherence, it is unknown whether use of generic versus brand statins influences adherence. METHODS AND RESULTS: We linked detailed inhospital clinical data for 1421 non-ST-segment elevation myocardial infarction patients discharged on a statin in 2006 to Medicare Part D medication claims records to examine postdischarge medication use. One-year statin adherence was defined using the proportion of days covered with optimal adherence ≥80%. We examined the association of brand versus generic statin prescription and 1-year adherence after adjusting for demographics, clinical factors, predischarge lipid values, prior statin use, and socioeconomic status. Overall, 65.5% of statin fills were for brand-name statins. There were few baseline differences in demographics and clinical factors among generic versus brand users. Patient copay amounts were higher for brand versus generic statins (median = $25 vs $5, P < .001), yet the mean proportion of days covered over 1 year was similar (71.5% vs 68.9%; P = .97; unadjusted odds ratio 1.15 [95% CI 0.96-1.37]). Proportion of days covered ≥80% was low for both generic (56.2%) and brand statins (55.9%; P = .93). Statin adherence rates remained similar between generic and brand users after adjusting for demographics, clinical risk factors, lipid value, prior statin use, and socioeconomic status. CONCLUSIONS: In a cohort of older non-ST-segment elevation myocardial infarction patients, we found no evidence that use of generic versus brand drug was associated with higher adherence to statins at 1 year after hospital discharge.

Full Text

Duke Authors

Cited Authors

  • O'Brien, EC; McCoy, LA; Thomas, L; Peterson, ED; Wang, TY

Published Date

  • July 2015

Published In

Volume / Issue

  • 170 / 1

Start / End Page

  • 55 - 61

PubMed ID

  • 26093864

Pubmed Central ID

  • 26093864

Electronic International Standard Serial Number (EISSN)

  • 1097-6744

International Standard Serial Number (ISSN)

  • 0002-8703

Digital Object Identifier (DOI)

  • 10.1016/j.ahj.2015.04.011

Language

  • eng