If you are having or have a history of heart problems you should not take Cialis. Cialis usage has not been studies in cases who have had heart failure or suffered from a stroke. Cialis should be avoided if you have suffered from any of these until further information is available.

If you are taking Cialis and experience prolonged erections or painful erections or an erection that has lasted for over four hours, you should stop all sexual activity immediately and phone your physician. If you do not consult your physician about the side effects of Cialis it could cause permanent impotency.

While Cialis can be the right drug for some men who are suffering from ED it might not be perfect for everyone.