NCIt definition : A Fab fragment of the chimeric monoclonal antibody 7E3 and inhibitor of the glycoprotein
(GP) IIb/IIIa receptor, that blocks platelet aggregation. Abciximab binds to the GP
IIb/IIIa receptor on the platelet membrane, which inhibits the binding of fibrinogen
to the GP IIb/IIIa receptor. This prevents both platelet aggregation and thrombus
formation.;