See also Warning section.
Nausea, vomiting, loss of appetite, diarrhea, or mouth/lip sores may occur. Nausea and vomiting usually last for less than 24 hours and loss of appetite may last for several days. Nausea and vomiting can be severe. In some cases, your doctor may prescribe medication to prevent or relieve nausea and vomiting. Eating several small meals, not eating before treatment, or limiting activity may help lessen some of these effects. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Temporary hair loss may occur. Normal hair growth should return after treatment has ended.
Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.
Tell your doctor right away if you have any serious side effects, including: confusion, swelling of lower legs/feet, vision changes.
Get medical help right away if you have any very serious side effects, including: stomach/abdominal pain that doesn't go away, black stools, vomit that looks like coffee grounds, yellowing eyes/skin, dark urine, signs of kidney problems (such as change in the amount of urine, pink urine).
A severe (sometimes fatal) lung problem (pulmonary fibrosis) has occurred in people taking this drug. This condition can occur months to years after you start taking this medication. Get medical help right away if you experience any of these serious side effects: cough, chest pain, difficult/painful breathing.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US - Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.