Pulmonary hypertension: 5-20mg PO TID or 2.5-10 mg IV bolus TID
Erectile dysfunction: 25-100mg PO 1hr prior to sexual activity, max once daily
Sildenafil
Acebutolol
Amlodipine
Bosentan
Hydralazine
Epoprostenol 
Tropicamide
Timolol