Zudena 100 mg is a medication used to treat erectile dysfunction (ED) in men. It contains udenafil as its active ingredient, which is a phosphodiesterase type 5 (PDE5) inhibitor. Udenafil works by improving blood flow to the penis, facilitating an erection when sexually stimulated.Udenafil works by inhibiting the PDE5 enzyme, leading to increased levels of cyclic guanosine monophosphate (cGMP). This results in relaxation of the smooth muscles in the penile region and improved blood flow, facilitating an erection when sexually stimulated. https://www.genericday.com/zudena-100-mg.html