Zudena 100 mg is a medication containing udenafil, which is used to treat erectile dysfunction (ED). Udenafil belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors, similar to sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra). As with other PDE5 inhibitors, Zudena primarily works by increasing blood flow to the penis during sexual stimulation, thereby helping men achieve and maintain an erection. Regarding its effects on sleep patterns, there isn't specific information available about Zudena 100 mg directly affecting sleep. Since its mechanism of action is focused on erectile function and blood flow, any potential impact on sleep patterns would likely be indirect and minimal. https://www.genericday.com/zudena-100-mg.html