Pharmacology Immunomodulators ce37e909 Bosentan is A Endothelin receptor blocker B ACEI C IIb/IIIa receptor blocker D None of the above High-Yield Explanation It is a dual endothelial receptor antagonist. FDA has approved the use of Bosentan for Raynaud's phenomenan, pulmonary aery hypeension. Ref: HL Sharma 3rd ed,Vasoactive peptides