Platelets return to normal function how many hours after stopping eptifibatide?

Platelets return to normal function how many hours after stopping eptifibatide?

• A. 2-4 hours
• B. 4-6 hours
• C. 8-12 hours
• D. 24 hours

Answer: (B)

The question tests how quickly platelet function returns after stopping a reversible GP IIb/IIIa inhibitor. Eptifibatide works by reversibly blocking the GP IIb/IIIa receptor on platelets, preventing aggregation. It has a short half-life (about 2.5 hours), so as the drug is cleared and receptor blockade wears off, platelets regain function as new platelets circulate. Clinically, platelet function typically returns to baseline within roughly 4-6 hours after stopping the infusion, which is why the 4-6 hour window is the best choice. The 2-4 hour option is too soon given the need for drug clearance, while 8-12 hours or 24 hours would imply a slower reversal than what is typically observed with this agent.

The question tests how quickly platelet function returns after stopping a reversible GP IIb/IIIa inhibitor. Eptifibatide works by reversibly blocking the GP IIb/IIIa receptor on platelets, preventing aggregation. It has a short half-life (about 2.5 hours), so as the drug is cleared and receptor blockade wears off, platelets regain function as new platelets circulate. Clinically, platelet function typically returns to baseline within roughly 4-6 hours after stopping the infusion, which is why the 4-6 hour window is the best choice. The 2-4 hour option is too soon given the need for drug clearance, while 8-12 hours or 24 hours would imply a slower reversal than what is typically observed with this agent.