- Treatment for pulmonary hypertension with epoprostenol (Flolan), treprostinil (Remodulin), iloprost (Ventavis), bosentan (Tracleer), ambrisentan (Letairis), sildenafil (Revatio), tadalafil (Adcirca). The use of sildenafil, tadalafil, or vardenafil is prohibited for any reason within 7 days of hemodynamic assessments on Days 1 and 180).