NCIt definition : The hydrochloride salt form of tirofiban, a non-peptide tyrosine derivative with anticoagulant
property. Tirofiban antagonizes fibrinogen binding to the platelet cell surface receptor,
glycoprotein (GP) IIb/IIIA complex, one of the two purinergic receptors activated
by ADP. The antagonism prevents adenylyl cyclase activation, which mediated via GP
IIb/IIIa receptor complex, and results in decreased levels of cAMP and thereby interferes
with platelet membrane function and subsequent platelet-platelet interaction, release
of platelet granule constituents and prolongation of bleeding time.;