Abstract: The invention provides a process to restore platelet aggregation by the administration of antibody combining site-containing molecules that specifically bind to a specific class of reversibly-bound GPIIb/IIIa fibrinogen receptor antagonist compounds.

Abstract: The present invention is directed to coadministration of the fibrinogen receptor antagonists 3S-[[4-[[4-aminoiminomethyl)phenyl]amino]-1,4-dioxobutyl]amino]-4-pentynoic acid or ethyl 3S-[[4-[[4-(aminoiminomethyl)phenyl]amino]-1,4-dioxobutyl]amino]-4-pentynoate together with an anti-platelet agent such as aspirin and/or an anti-coagulant such as heparin.

Abstract: The invention provides a process to restore platelet aggregation by the administration of antibody combining site-containing molecules that specifically bind to a specific class of reversibly-bound GPIIb/IIIa fibrinogen receptor antagonist compounds.

Abstract: The present invention is for pharmaceutical compositions and a method of use for the transdermal delivery of N-[N-[5-[4-(aminoiminomethyl)phenyl]-1-oxopentyl]-L-&agr;-aspartyl]-L-phenylalanine or its esters and their pharmaceutically acceptable salts which are useful as platelet aggregation inhibitors.

Abstract: A method for determining the amount of an antiplatelet compound in a subject being treated with the compound which comprises calculating the ACT number of the subject's blood containing a reagent which immunoreacts with the antiplatelet compound and comparing the figure to a standardized concentration figure. In subjects concurrently being treated with heparin and antiplatelet compounds, the method can be practiced without additional heparin added to the blood sample. The invention also provides reagents which immunoreact with antiplatelet compounds and kits comprising immunoreactive reagents.

Abstract: A radiopharmaceutical capable of localizing at a site of thrombus containing activated platelets within a mammalian body is provided wherein the radiopharmaceutical comprises a linear peptidomimetic containing ligand capable of specifically binding to the GPIIb/IIIa integrin receptor of platelets in the thrombus and a radionuclide covalently bound to the peptidomimetic containing ligand. The ligand compositions of the invention are provided complexed with a selected metal radionuclide to form a diagnostic or therapeutic radiopharmaceutical to image a site of thrombus or provide radiotherapy to the site of thrombus, respectively.

Abstract: N-[8-[(Aminoiminomethyl)amino]-1-oxooctyl]-N-L-.alpha.-aspartyl-L-phenylani ne is disclosed as a highly potent inhibitor of platelet aggregation.

Abstract: Novel tetrapeptide derivatives are provided which have useful activity as inhibitors of platelet aggregation. These compounds have the sequence X-Gly-Asp-Y wherein X is illustrated by arginine and Y is illustrated by O-methyltyrosine amide.