Vorapaxar sulfate (SCH 530348 sulfate), an antiplatelet agent, is a selective, orally active, and competitive thrombin receptor protease-activated receptor (PAR-1) antagonist ( K i =8.1 nM). Vorapaxar sulfate inhibits thrombin receptor-activating peptide (TRAP)-induced platelet aggregation in a dose-dependent manner In Vitro Vorapaxar sulfate (SCH 530348 sulfate) shows potent inhibition of thrombin-induced platelet aggregation with an IC 50 of 47 nM and haTRAP-induced platelet aggregation with an IC 50 of 25 nM. Vorapaxar sulfate (SCH 530348 sulfate) inhibits thrombininduced calcium transient in human coronary artery smooth muscle cells (HCASMC) with a K i of 1.1 nM. It also inhibits thrombin-stimulated thymidine incorporation in HCASMC with a Ki of 13 nM. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid IC50& Target:PAR1