Zudena 100 mg is an effective medication used primarily for the treatment of erectile dysfunction (ED) in men. It contains Udenafil as its active ingredient, which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. Like other PDE5 inhibitors (such as Sildenafil, Tadalafil, and Vardenafil), Zudena works by improving blood flow to the penis, aiding men in achieving and maintaining an erection during sexual stimulation.