Cialis (tadalafil) is supposed to be used by male patients diagnosed with erectile dysfunction due to any reasons – psychological, physical, or a combination of both. This medicine works by increasing blood flow to the tissues of the penis and making it possible to obtain an erection sufficient for having sex. Your doctor needs to be notified of any medical conditions like liver disease, high or low blood pressure, blood cell disorder, physical deformity of the penis, heart disease, a recent history of a stroke, stomach ulcer, kidney disease, congestive heart failure, bleeding disorder, retinitis pigmentosa, a history of a heart attack, or chest pain, as they can require additional tests to make sure Cialis will work fine for you without affecting your wellbeing. Avoid taking more of Cialis and report any symptoms of overdose to your local emergency center. The following overdose symptoms are possible: nausea, fainting, irregular heartbeat, chest pain, and light-headedness. Although in most cases you will get just a few mild side effects, more serious ones are also possible and can include shortness of breath, sweating, fainting, light-headedness, swelling in your hands, ankles, or feet, sudden hearing loss, chest pain, or seizure.