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Prasugrel achieves greater inhibition of platelet aggregation and a lower rate of non-responders compared with clopidogrel in aspirin-treated patients with stable coronary artery disease
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2006 (English)In: European Heart Journal, ISSN 0195-668X, E-ISSN 1522-9645, Vol. 27, no 10, 1166-1173 p.Article in journal (Refereed) Published
Abstract [en]

AIMS: This study was designed to compare the degree of inhibition of platelet aggregation (IPA) of prasugrel with that of clopidogrel in stable aspirin-treated patients with coronary artery disease (CAD). METHODS AND RESULTS: Subjects (n=101) were randomly assigned to the following loading dose (LD) (day 1)/maintenance dose (MD) (days 2-28) combinations: prasugrel, 40 mg/5 mg; 40 mg/7.5 mg; 60 mg/10 mg; 60 mg/15 mg; or clopidogrel, 300 mg/75 mg. Turbidometric platelet aggregation was measured at multiple timepoints during the study. At 4 h after dosing, with 20 microM ADP, both prasugrel LDs achieved significantly higher mean IPA levels (60.6% and 68.4 vs. 30.0%, respectively; all P<0.0001) and lower percentage (3 vs. 52%, P<0.0001) of pharmacodynamic non-responders (defined as IPA <20%) than clopidogrel. Prasugrel 10 and 15 mg MDs achieved consistently higher mean IPA than clopidogrel 75 mg at day 28 (all P<0.0001). At pre-MD on day 28, there were no non-responders in the 10 and 15 mg prasugrel group, compared with 45% in the clopidogrel group (P=0.0007). CONCLUSION: In this population, prasugrel (40-60 mg LD and 10-15 mg MD) achieves greater IPA and a lower proportion of pharmacodynamic non-responders compared with the approved clopidogrel dosing.

Place, publisher, year, edition, pages
2006. Vol. 27, no 10, 1166-1173 p.
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Medical and Health Sciences
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URN: urn:nbn:se:uu:diva-21980DOI: 10.1093/eurheartj/ehi877PubMedID: 16621870OAI: oai:DiVA.org:uu-21980DiVA: diva2:49753
Available from: 2007-01-09 Created: 2007-01-09 Last updated: 2017-12-07Bibliographically approved

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Siegbahn, AgnetaWallentin, Lars

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