Zhewitra 20 mg contains Vardenafil, a medication used to treat erectile dysfunction (ED) in men. It works by relaxing blood vessels and increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. Take the medication 30–60 minutes before sexual activity. The effects usually last 4–5 hours, so plan accordingly based on your schedule. Keep Zhewitra in a cool, dry place away from direct sunlight. Avoid leaving it in hot cars or luggage in high temperatures, as heat can reduce effectiveness.