selegiline + PDE5 inhibitor (pulmonary arterial hypertension)

Tramadol + PDE5 Inhibitor (Aytu BioScience/Daewoong)

PDE5 inhibitors (Hangzhou Adamerck)

PDE5 inhibitors (Sun Yat Sen University)

Udenafil

C₂₅H₃₆N₆O₄S

Avanafil(Spedra, Stendra)

C₂₃H₂₆ClN₇O₃ · Rx

DehydraTECH-PDE5

PDE4 Inhibitor(Novartis)

PDE3 inhibitor(Bayer)

TYK2 inhibitor