Zudena pills are a prescription medication used to treat erectile dysfunction (ED) in men. It contains Udenafil as its active ingredient. Zudena pills is designed to help men achieve and maintain an erection during sexual activity by enhancing blood flow to the penis. Zudena pills work by inhibiting the phosphodiesterase type 5 (PDE5) enzyme, which normally breaks down a chemical called cGMP. cGMP helps relax smooth muscle tissues and expand blood vessels in the penis. By preserving cGMP levels, Zudena pills improve blood flow during sexual stimulation, which allows for a natural erection.