<prompt> A 60-year-old man with unstable angina is treated with an intravenously administered glycoprotein IIb-IIIa inhibitor. The mechanism of action of this agent is the ability toDilate coronary aeries.Inhibit atherogenesis.Inhibit platelet adhesion.Inhibit platelet aggregation.  <response>: Glycoprotein IIb-IIIa inhibitors Prevent the action of the platelet surface receptor glycoprotein complex, which is required for formation of fibrinogen bridges between adjacent platelets Thus inhibiting platelet aggregation. Ex- TICLOPIDINE,CLOPIDOGREL,PRASUGREL 