Possible side effects of Advil include indigestion, heartburn, abdominal pain and shortness of breath, according to Drugs.com. Other possible side effects include feeling full, acid or sour stomach, belching and bloating. Advil may cause some people to experience cloudy urine or a decreased amount of urine. Advil can also cause flatulence, constipation or diarrhea.
After taking Advil, some people may experience excess air or gas in the intestines or stomach, notes Drugs.com. Advil may cause some people to feel discomfort or pain in the chest, upper stomach or throat. It may cause the hands, fingers or face to swell. Advil may also cause swelling in the feet, lower legs or ankles. Noisy, rattling breathing, difficulty breathing during rest or exertion, a rash with flat or raised lesions, and unusual weakness or tiredness are additional potential side effects of Advil.
There are many other rare side effects associated with Advil, according to Drugs.com. Some side effects may go away on their own when the body becomes used to the medication, and the side effects do not always require medical attention. However, it is important to check with a physician if they do occur. It is possible to overdose on Advil, so it should only be taken as directed.