Patients who have a ‘left ventricular outlet obstruction’, valvular problems or heart muscle enlargement may experience side effects such as fainting or light-headedness after taking Cialis. Cialis is not recommended for patients who have suffered a recent heart attack or stroke, heart pains (angina), heart failure, uncontrolled blood pressure or uncontrolled irregular heartbeats, severe liver disease, and retinal eye problems. There may be a small chance of experiencing priapism or painful, prolonged erections after taking Cialis. This serious condition requires immediate medical attention. Patients should seek prompt medical attention if their erection lasts longer than 4 hours. |