Abstract:
BACKGROUND:Patients with atrial fibrillation (AF) often take multiple medications. METHODS AND RESULTS:We examined characteristics and compared adjusted outcomes between rivaroxaban and warfarin according to number of concomitant baseline medications and the presence of combined cytochrome P450 3A4 and P-glycoprotein inhibitors in the Rivaroxaban Once Daily Oral Direct Factor Xa Inhibition Compared With Vitamin K Antagonism for Prevention of Stroke and Embolism Trial in Atrial Fibrillation (ROCKET AF) study. At baseline, 5101 patients (36%) were on 0 to 4 medications, 7298 (51%) were on 5 to 9, and 1865 (13%) were on ≥ 10. Although polypharmacy was not associated with higher risk of stroke or non-central nervous system embolism (adjusted hazard ratio, 1.02 for ≥ 10 versus 0-4 medications; 95% confidence interval, 0.76-1.38), it was associated with higher risks of the combined end point of stroke, non-central nervous system embolism, vascular death, or myocardial infarction (adjusted hazard ratio, 1.41 for ≥ 10 versus 0-4 medications; 95% confidence interval, 1.18-1.68) and nonmajor clinically relevant or major bleeding (adjusted hazard ratio, 1.47 for ≥ 10 versus 0-4 medications; 95% confidence interval, 1.31-1.65). There was no significant difference in primary efficacy (adjusted interaction P=0.99) or safety outcomes (adjusted interaction P=0.87) between treatment groups by number of medications. Patients treated with 0 to 4 medications had lower rates of major bleeding with rivaroxaban (adjusted hazard ratio, 0.71; 95% confidence interval, 0.52-0.95; interaction P=0.0074). There was no evidence of differential outcomes in those treated with ≥ 1 combined cytochrome P450 3A4 and P-glycoprotein inhibitors. CONCLUSIONS:In a population of patients with atrial fibrillation, two thirds were on ≥ 5 medications. Increasing medication use was associated with higher risk of bleeding but not stroke. Rivaroxaban was tolerated across complex patients on multiple medications. CLINICAL TRIAL REGISTRATION:URL: http://www.clinicaltrials.gov. Unique identifier: NCT00403767.
journal_name
Circulationjournal_title
Circulationauthors
Piccini JP,Hellkamp AS,Washam JB,Becker RC,Breithardt G,Berkowitz SD,Halperin JL,Hankey GJ,Hacke W,Mahaffey KW,Nessel CC,Singer DE,Fox KA,Patel MRdoi
10.1161/CIRCULATIONAHA.115.018544subject
Has Abstractpub_date
2016-01-26 00:00:00pages
352-60issue
4eissn
0009-7322issn
1524-4539pii
CIRCULATIONAHA.115.018544journal_volume
133pub_type
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