Diarrhea, nausea, mouth sores, dry/itchy skin, tiredness, back pain, headache, or loss of appetite may occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
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, such as: easy bruising/bleeding, changes in your nails (such as nail tenderness/irritation/redness, change in nail color), signs of eye disease (such as vision changes, eye redness/pain, light sensitivity, eye discharge), signs of low level of sodium in the blood (such as nausea, extreme drowsiness, mental/mood changes, seizures).
Get medical help right away if you have any very serious side effects, such as: slow/fast/irregular heartbeat, severe dizziness, fainting, slow/shallow breathing, symptoms of heart failure (such as shortness of breath, swelling ankles/feet, unusual tiredness, unusual/sudden weight gain), new or worsening symptoms of lung disease (such as trouble breathing, chest pain, cough, fever), signs of blood clots (such as pain/swelling/warmth in the groin/calf).
This medication may lower your ability to fight infections. This may make you more likely to get a serious (rarely fatal) infection or make any infection you have worse. Tell your doctor right away if you have any signs of infections (such as sore throat that doesn't go away, fever, chills).
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, such as: 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.