Quite many men nowadays suffer from male sexual function problems. The reasons can be different, from psychological to physiological disorders or illnesses. Are there any ways out or treatments? Yes. One of the popular medications for relieving erectile dysfunction is Cialis. Before you purchase Cialis and start the course, you should consult your healthcare provider to set the right for you dose and actually the ability to take it. You should also tell your doctor about your health state and problems if there are any as well as other medications that you take, because some of them may not interact with Cialis. The active ingredient of Cialis is Tadafil. Cialis pills contain 5, 10 or 20 of this active ingredient. With the wide popularity of the online pharmacy shops, it became possible to buy Cialis online. While it is not a problem to buy Cialis without prescription, it is still recommended to be examined before the course. Cialis is proved to be generally well-tolerated, but in some cases such side effects as headache, indigestion, back pain, runny or stuffy noise, flushing, back pain, dizziness, swelling of the throat, face, swelling of the tongue or lips, difficulty breathing, hives and flushing were found. If anything like this occurs, consult your doctor.