See also Warning section.
Nausea, vomiting, loss of appetite, diarrhea, headache, confusion, drowsiness, metallic taste in the mouth, or weakness may occur. 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 these effects persist or worsen, tell your doctor or pharmacist promptly.
Severe nausea, vomiting, and diarrhea may infrequently result in a loss of too much body water (dehydration). Contact your doctor promptly if you notice any symptoms of dehydration such as unusual decreased urination, unusual dry mouth/increased thirst, lack of tears, dizziness/lightheadedness, or pale/wrinkled skin.
Temporary hair loss may occur. Normal hair growth should return after treatment has ended.
Many people using this medication have serious side effects. However, your doctor has prescribed this drug because he or she has judged that the benefit to you is greater than the risk of side effects. Careful monitoring by your doctor may decrease your risk.
Tell your doctor right away if you have any serious side effects, including: hearing changes (decreased hearing, ringing in ears), menstrual changes (e.g., stopped periods), numbness/tingling, unusual bleeding/bruising (e.g., small red spots on the skin, black/bloody stools, bloody urine, vomit that looks like coffee grounds), urination changes (e.g., decreased/painful urination).
This medication can lower the body's ability to fight an infection. Tell your doctor promptly if you develop any signs of an infection such as fever, chills, or persistent sore throat.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any of the following symptoms of a serious allergic reaction: 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.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.