Zudena 100 mg is a medication used to treat erectile dysfunction (ED) in men. It contains udenafil, which is a PDE5 inhibitor, similar to sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra). Udenafil works by increasing blood flow to the penis, helping men with ED achieve and maintain an erection during sexual activity when sexually aroused.
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