Undesirable effects from the use of ibuprofen are rare, but they may occur. Tell the doctor if the patient experiences any undesirable effect.
Central Nervous System: Dizziness, drowsiness, general ill feeling (malaise), lightheadedness, nervousness, headache, fatigue, mood swings (emotional lability), loss of sensation (paresthesia), hallucinations, and dream abnormalities.
Gastrointestinal: Stomach ulceration and/or bleeding, indigestion, heartburn, nausea, vomiting, eating disorder (anorexia), diarrhea, constipation, mouth ulcers (stomatitis), flatulence, bloating, and abdominal pain.
Kidneys: Blood in the urine, kidney damage and kidney failure.
Liver: Abnormal liver function tests, jaundice, inflammation of the liver and liver failure.
Blood: Blood does not clot properly, anemia and low white blood cell count.
Cardiovascular: Fluid retention, increased blood pressure, low blood pressure, cerebrovascular accident (stroke), and palpitations.
Special senses: Ringing in the ears (tinnitus), decreased hearing, loss of visual sharpness (amblyopia), inflammation or infection of the membrane lining of the eyelids (conjunctivitis), inflammation of the optic nerve (optic neuritis), double vision (diplopia) and cataracts.
Skin: Skin rashes; symptoms of serious allergies (e.g., Stevens-Johnson Syndrome, Lyell's syndrome, and erythema multiforme) which include multiple skin lesions, itch, fever, and joint pains.
Allergic reactions manifested as a syndrome of abdominal pain, fever, chills, nausea and vomiting. Whole-body allergic reaction (anaphylaxis), constriction of air passages of the lungs, dry mouth, gingival ulceration, and stuffy nose (rhinitis) have also been reported.