Iloprost ( marketed as Ventavis ) was the only inhaled form of prostacyclin approved for use in the US and Europe , until the inhaled form of treprostinil was approved by the FDA in July 2009 and is marketed under the trade name Tyvaso .
Iloprost ( marketed as Ventavis ® ) is the only inhaled form of prostacyclin approved for use in the US and Europe .