See also Warning section.Nausea, vomiting, constipation, diarrhea, loss of appetite, dry mouth, headache, dry/flaking skin, flushing, and increased sweating may occur. 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.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: hearing changes, mental/mood changes (e.g., confusion, unusual thoughts/behavior, depression), muscle problems (e.g., stiff/painful muscles, shaking, unusual urge to keep moving), nerve problems (e.g., numbness/tingling/pain), unusual bleeding/bruising (e.g., small red spots on the skin, black/bloody stools, bloody urine, vomit that looks like coffee grounds).Pain or sores in the mouth and throat may occur. Brush your teeth gently/carefully, avoid using mouthwash that contains alcohol, and rinse your mouth frequently with cool water mixed with baking soda or salt. It may also be best to eat soft, moist foods.Get medical help right away if this rare but very serious side effect occurs: seizure.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), trouble breathing, severe dizziness.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.