See also Warning section.
Redness, itching, pain, or swelling at the injection site may occur. This usually starts 1-2 days after the injection and clears up in 3-5 days. Injection site reactions usually lessen after the first month. Headache may also occur. If any of these effects last or get worse, tell your doctor or pharmacist promptly.
Remember that this medication has been prescribed because your doctor 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 develop signs of infection while using this drug, such as: sore throat that doesn't go away, cough that doesn't go away, fever, chills, night sweats, trouble breathing, painful/frequent urination, unusual vaginal discharge, white patches in the mouth (oral thrush).
Tell your doctor right away if you have any serious side effects, including: nausea/vomiting that doesn't stop, a rash on nose and cheeks (butterfly rash), dizziness, extreme fatigue, looking pale, hair loss, swelling of the arms/legs, unusual bruising/bleeding, severe headache, mental/mood changes, seizures, unexplained muscle weakness, numbness/tingling of the hands/feet, unsteadiness, vision changes, severe stomach/abdominal pain, dark urine, yellowing eyes/skin.
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), 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.