Tadalafil

**Definition:** A carboline derivative and PHOSPHODIESTERASE 5 INHIBITOR that is used primarily to treat ERECTILE DYSFUNCTION; BENIGN PROSTATIC HYPERPLASIA and PRIMARY PULMONARY HYPERTENSION.

**Tree numbers:** - D03.383.725.150.500 - D03.633.100.473.402.111.500 - D03.633.300.154.672

**Synonyms:** - Pyrazino(1',2':1,6)pyrido(3,4-b)indole-1,4-dione, 6-(1,3- benzodioxol-5-yl)-2,3,6,7,12,12a-hexahydro-2-methyl-, (6R,12aR)-