What are ADP inhibitors?

Ticlopidine, Clopidogrel, prasugrel, and ticagrelor are P2Y12 ADP receptor inhibitors that also block platelet aggregation but by a mechanism different from that of aspirin The maximum inhibition of platelet aggregation is achieved in 1 to 3 hours with ticagrelor, 2 to 4 hours with prasugrel, 3 to 4 days with ticlopidine, and 3 to 5 days with Clopidogrel When treatment is suspended, the platelet system requires time to recover