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Pharmacodynamic effects during the transition between cangrelor and prasugrel. | LitMetric

Pharmacodynamic effects during the transition between cangrelor and prasugrel.

Coron Artery Dis

Department of Medicine, Cardiology Unit, Cardiovascular Research Institute, University of Vermont, Burlington, Vermont, USA.

Published: January 2015

AI Article Synopsis

Article Abstract

Objective: The aim of this study was to determine the impact of cangrelor and prasugrel on the pharmacodynamic effects of each agent.

Background: The development of an intravenous P2Y12 antagonist necessitates transition between intravenous and oral therapy.

Methods: Patients (n=15) with stable coronary artery disease who were taking 81 mg aspirin daily were recruited. On study day 1, they received a bolus plus 2-h infusion of cangrelor plus a 60 mg dose of prasugrel at 1 h (n=3), 1.5 h (n=6), 2 h (n=3), or 2.5 h (n=3). Pharmacodynamic effects (light transmission platelet aggregation in response to 20 μmol/l ADP, VerifyNow, and flow cytometry) were assessed during and after the cangrelor infusion. Patients took 10 mg of prasugrel daily for either 5 days (n=6) or 6 days (n=6). On study day 8, pharmacodynamic effects were assessed before and during a bolus plus 2-h infusion of cangrelor.

Results: During cangrelor infusion (days 1 and 8), extensive inhibition of platelet function, reflected by limited residual platelet reactivity, was apparent. On day 1, transient (limited to the first hour after cangrelor was stopped) but substantial (>50%) recovery of platelet reactivity was observed. This recovery was attenuated when prasugrel was given at 1.5 h (30 min before cangrelor was stopped).

Conclusion: Prasugrel did not alter the antiplatelet effects of cangrelor, but transient recovery of platelet reactivity was apparent during the transition from cangrelor to prasugrel. Recovery of platelet reactivity was limited when prasugrel was administered 30 min before the end of the cangrelor infusion.

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Source
http://dx.doi.org/10.1097/MCA.0000000000000158DOI Listing

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