Zhewitra 20 mg is a medication used to treat erectile dysfunction (ED) and contains Vardenafil as its active ingredient. It functions similarly to other PDE5 inhibitors like Viagra (Sildenafil) and Cialis (Tadalafil) but has its own unique properties. Vardenafil inhibits the enzyme phosphodiesterase type 5 (PDE5), which increases blood flow to the penis during sexual arousal. This helps achieve and maintain an erection.Can be taken with or without food, though a high-fat meal may delay the onset of action.