What are the side effects most common with Cialis?
If you develop any of the symptoms of an allergic reaction seek medical attention right away: swelling, fever, hives, difficulty breathing. Serious side effects of Cialis that require immediate medical assistance include: dizziness or nausea, pain or numbness in chest, arms, neck or jaw during sexual activity; odd heartbeat, vision or hearing problems, seizures, fainting, erections lasting more than 4 hours. Some of the less serious Cialis side effects include: pain in the back or muscles, upset stomach, headache, memory problems, redness in the face or neck.