It increases blood flow to specific components of the body, relaxing the easy muscles of the penis and in the end offering a firm erection while sexually aroused. Its advantage is that Vardenafil can work faster than Sildenafil. it’s also a good choice in particular for the ones folks that are allergic to Sildenafil. Zhewitra 60 mg works for up to 8 hours whilst sildenafil handiest works for 4 or 5 hours.