Some side effects may occur that usually do not need medical attention. Vomiting of blood or material that looks like coffee grounds Swelling of the face, fingers, or lower legs Numbness or tingling in the hands, feet, or lips Greatly decreased frequency of urination or amount of urine Check with your doctor immediately if any of the following side effects occur: Incidence not knownĪbdominal or stomach pain, cramping, or burningįeeling that something terrible will happen