Prostacyclin (or PGI2) is a member of the family of lipid molecules known as eicosanoids. It inhibits platelet activation and is also an effective vasodilator.
As a drug, it is also known as "epoprostenol". The terms are sometimes used interchangeably.
Read more about Prostacyclin: History, Production, Function, Degradation, Mode of Action, Members, Pharmacology