What should I watch for?
Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse.
You will be tested for tuberculosis (TB) before you start this medicine. If your doctor prescribes any medicine for TB, you should start taking the TB medicine before starting this medicine. Make sure to finish the full course of TB medicine.
Call your doctor or health care professional for advice if you get a fever, chills or sore throat, or other symptoms of a cold or flu. Do not treat yourself. This drug decreases your body's ability to fight infections. Try to avoid being around people who are sick.
Common and Rare Side Effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur:
Congestion in the chest
frequent or painful urination
joint or muscle stiffness, tightness, or rigidity
stomach discomfort or pain
Incidence not known
blistering, peeling, or loosening of the skin
bloody, black, or tarry stools
blue-yellow color blindness
chest discomfort or pain
cloudy or bloody urine
decreased urine output
difficult, irregular, troubled, or labored breathing (or difficulty with breathing gets worse)
difficulty with moving
dilated neck veins
feeling sad or empty
fruit-like breath odor
general feeling of discomfort, illness, or weakness
inability to move the arms, legs, or facial muscles
joint or muscle pain
large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
loss of consciousness
pain or discomfort in the arms, jaw, back, or neck
pain, redness, or swelling in the arm or leg
problems with bowel or bladder function
red skin lesions, often with a purple center
red, scaling, or crusted skin
severe and continuing nausea
severe numbness, especially on one side of the face or body
sores, ulcers, or white spots on the lips or in the mouth
swelling of the face, fingers, feet, or lower legs
tightness in the chest
unexplained weight loss
unusual bleeding or bruising
unusual tiredness or weakness
vomiting of blood or material that looks like coffee grounds
yellow eyes or skin
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Loss of energy or weakness
pain or burning in the throat
runny or stuffy nose
Bumps below the skin
hair loss or thinning
irritation or soreness of the mouth
itching, redness, or tearing of the eye
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.