Tadalafil
Drug20 milligram (mg) tablet, taken by mouth once a day for 52 weeks for the phase 1 portion. Open label phase includes 40 mg tablet taken by mouth once a day until the sponsor concludes the study or tadalafil becomes commercially available for the treatment of Pulmonary Arterial Hypertension (PAH).
Other names: LY450190, Cialis, IC351