Cialis is used for the treatment of erectile dysfunction for a long time. Thanks to the action of the drug thousands of men have already restored their erection and returned normal sex lives. Cialis increases blood flow to penis of a man and thus increasing erection. The drug does not have side effects and therefore the correct usage of cialis will bring you the needed results without any harm your health. Both food,viagra and alcohol do not affect the action of Cialis, and so taking only 1 pill of Cialis you can have active and normal life (levitra,kamagra).