<prompt> Which of the following drugs does not act by blocking Gp IIbIIIa receptors?AbciximabEptifibatideTirofibanClopidogrel  <response>: Ans. D ClopidogrelRef: KDT 8e p678Clopidogrel inhibits ADP receptors whereas abciximab, tirofiban and eptifibatide are GP IIbIIIa antagonists. 