Oral glycoprotein IIb/IIIa antagonists: new insights from the SYMPHONY trial.
Platelet aggregation plays a central role in the pathophysiology of acute coronary syndromes, and the platelet glycoprotein IIb/IIIa receptor has been identified as the critical final mediator of this process. Antagonists of this receptor used parenterally during both acute coronary syndromes and percutaneous coronary interventions reduce the likelihood of subsequent major cardiac complications. However, after the treatment period little further benefit accrues. Based on these observations and that of the significant benefit of aspirin in cardiovascular secondary prevention, oral glycoprotein IIb/IIIa receptor antagonists are being evaluated with the goal of extending the benefit of glycoprotein IIb/IIIa inhibition into chronic secondary prevention. This paper will review the results of the SYMPHONY study of one such oral agent, sibrafiban, and the current state of the oral glycoprotein IIb/IIIa inhibitor field.
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