Zhewitra 20 mg contains vardenafil, which is a medication used to treat erectile dysfunction (ED) in men. Vardenafil belongs to a class of drugs called phosphodiesterase type 5 (PDE5) inhibitors, similar to sildenafil (Viagra), tadalafil (Cialis), and udenafil (Zudena). Vardenafil works by inhibiting the action of the enzyme PDE5, which regulates blood flow in the penis. By inhibiting PDE5, vardenafil increases blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection. Zhewitra 20 mg typically starts working within 30 minutes to 1 hour after ingestion, although individual response times may vary. It's usually recommended to take vardenafil about 30 minutes before anticipated sexual activity. https://www.genericday.com/zhewitra-20-mg.html