Zudena 100 mg is a medication used to treat erectile dysfunction (ED) in men. It contains the active ingredient udenafil, which belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Udenafil works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Zudena 100 mg is available in tablet form and is typically taken orally with water. The dosage may vary depending on individual factors such as the severity of ED and other medical conditions. It's essential to follow the dosage instructions provided by a healthcare provider or the medication's packaging.