Extra Super Zhewitra is a combination of Vardenafil and Dapoxetine, Used in the treatment of Premature ejaculation and erectile dysfunction. Vardenafil is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Vardenafil is in a class of medications called phosphodiesterase (PDE) inhibitors. It works by increasing blood flow during sexual stimulation.