<unk>  is an endothelin receptor antagonist that is FDA approved for the {{{indicationType}}} of pulmonary arterial hypertension. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include edema, decreased hemoglobin, and headache.
Ambrisentan
Bosentan
Macitentan
Sitaxentan
Iofendylate
Bepotastine Besilate
Spirapril
Riociguat