Cialis is the brand-name for tadalafil. it is used to treat erectile dysfunction (ED) in men. The active ingredient in CIALIS tablets, tadalafil, belongs to a group of medicines called phosphodiesterase type 5 inhibitors. Following sexual stimulation, CIALIS works by helping the blood vessels in your penis to relax, allowing the flow of blood into your penis. The result of this is improved erectile function. Like Viagra, it?s very easy to use, however this pill is more effective and has less side effects in comparison to Viagra or Sildenafil Citrate. Advantages .Cialis works twice as fast as Viagra ?The power and effects of Cialis stay in your body 9 times longer than Viagra ?With Cialis the side effects are minimal,if you have require and interest in this product,please feel free to contact us.