<prompt> Iloprost in pulmonary aerial hypeension is administeredIntravenousIntramuscularOralInhalation  <response>: Ref Harrison 19 th ed pg 1666 Iloprost is a prostacyclin analogue approved inhalation for treatment of pulmonary aerial hypeension PAH Epoprostinil as iv treprostinil as oral ivSCinhalation. 