It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly. Blood tests may be needed to check for unwanted effects.
Colitis (inflammation of the colon) may occur with this medicine. Tell your doctor right away if you have stomach pain or tenderness, watery or bloody diarrhea, or a fever after receiving the medicine.
Check with your doctor right away if you have pain or tenderness in the upper stomach; pale stools; dark urine; a loss of appetite; nausea; unusual tiredness or weakness; or yellow eyes or skin. These could be symptoms of a serious liver problem.
Serious skin reactions can occur with this medicine. Check with your doctor right away if you have blistering, peeling, or loosening of the skin; red skin lesions; severe acne or skin rash; sores or ulcers on the skin; or fever or chills while you are receiving this medicine.
Check with your doctor right away if you are having unusual weakness of the arms or legs, or a burning, numbness, tingling, or painful sensation in the arms, hands, legs, or feet. These could be symptoms of a serious muscle and nerve problem.
Serious problems with the adrenal, pituitary, or thyroid glands (hormone glands) may occur while you are receiving this medicine. Tell your doctor if you start having continuing or unusual headaches; changes in mood or behavior (eg, being irritable or forgetful); lightheadedness, dizziness, or fainting; unusual sluggishness; or an increase in weight.
Check with your doctor right away if blurred vision, difficulty with reading, eye pain, or any other change in vision occurs while you are receiving this medicine. Your doctor may want you to have your eyes checked by an ophthalmologist (eye doctor).