Cialis (tadalafil) can be used for patients diagnosed with ED (erectile dysfunction) and unable to perform sexually as a result of that. You are not supposed to be taking Cialis without previously talking to your health care provider if you have Peyronie's disease, penis angulation, active stomach ulcers, history of painful or prolonged erection, recent stroke, kidney disease, sickle cell anemia, eye problems, bleeding disorders, coronary artery disease, liver disease, fibrosis, or any blood system cancers, a that may require a higher or lower dose of Cialis. If you are not going to visit a doctor and intend to purchase Cialis online spending less of your money, make sure you read the label carefully to learn more about possible side effects and drug interactions, as well as contraindications you may have, the effects of Cialis are based on affecting your blood flow. As a result of that you can get a more powerful and stable erection that will be possible to maintain for as long as necessary. Cialis is not going to treat your impotence rather than help you get it under control. You will always need to make sure you take the right dose of Cialis, as using more of it is not necessarily going to help you get a fuller erection.