Zudena 100mg is a medication that contains Udenafil, a type of phosphodiesterase type 5 (PDE5) inhibitor, which is used to treat erectile dysfunction (ED). Udenafil works by relaxing the blood vessels in the penis, allowing increased blood flow, which helps achieve and maintain an erection during sexual arousal. If you have concerns about the duration of action or the effectiveness of Zudena 100 mg tablet, it's always a good idea to consult with a healthcare provider to tailor the treatment to your needs and health profile.