Zhewitra 40mg’s vardenafil is How To Work Zhewitra 40mg or Zhewitra 60 as increase the blood flowing into sexual part of the body which is leads to achieve more desirable sex. Zhewitra vardenafil tablet is classified into PDE-5, that PDE-5 is break the cycle of cGMP enzyme. After the break cycle of cGMP, it is increase the level of nitric oxide into body. And this nitric oxide is relax the blood vessels of penile, that is why the blood flow of the body is increase the finally improve your sexuality. Thus this tablet is long lasting effect (bioaviablity) approx 4 to 6 hours into body.