<unk> , sold under the brand names Remodulin for infusion, Orenitram for oral, and Tyvaso for inhalation, is a vasodilator that is used for the treatment of pulmonary arterial hypertension.<unk>  is a synthetic analog of prostacyclin (PGI2).<unk>  was approved for use in the United States in May 2002. The drug can be given in various forms: IV, subcutaneous injection, oral inhalation, as well as oral extended-release tablets. The subcutaneous administration tends to be very painful.
Treprostinil
Tadalafil
Oxybutynin
Avanafil
Vardenafil
Udenafil
Finasteride
Acebutolol