See also Warning section.
Redness, warmth, pain, swelling, or itching at the injection site may occur. Headache may also occur. If any of these effects persist or worsen, 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, including: fast heartbeat, unusual tiredness, yellowing eyes/skin, dark urine, signs of kidney problems (such as change in the amount of urine).
Treatment with this medication may rarely cause a serious swelling of the brain (aseptic meningitis syndrome) several hours to 2 days after your treatment. Get medical help right away if you have severe headache, stiff neck, drowsiness, fever, sensitivity to light, eye pain, or nausea/vomiting.
Lung problems may rarely occur 1 to 6 hours after your treatment. Get medical help right away if you have trouble breathing, chest pain, blue lips/skin, or fever.
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.