SIDE EFFECTS: Pain/redness/swelling at the injection site may occur. Other side effects may include fever, irritability, mild swollen glands (lymph nodes), measles-like rash, hives, tiredness, sore throat, dizziness, headache, nausea, vomiting, diarrhea, and body aches. These rubella-like symptoms may occur 11 to 20 days after vaccination and are usually mild and temporary, often persisting 1 to 5 days. If any of these effects persist for longer than 5 days 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. However, report all side effects to the doctor.Tell your doctor immediately if any of these unlikely but serious side effects occur: joint pain/stiffness, tingling/numbness/pain in the arms/legs, fainting.Tell your doctor immediately if any of these rare but very serious side effects occur: persistent joint pain/stiffness, swollen/painful testicles in men, easy bruising/bleeding within 2 weeks to 2 months of vaccination, inability to make muscles of the legs/arms work (paralysis), seizures, mental/mood changes (e.g., unusual behavior, severe drowsiness, stiff neck, visual sensitivity to light), decreased hearing, vision problems.A very serious allergic reaction to this drug is rare. However, seek immediate medical attention 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.Contact your doctor for medical advice about side effects. The following numbers do not provide medical advice, but in the US, you may report side effects to the Vaccine Adverse Event Reporting System (VAERS) at 1-800-822-7967. In Canada, you may report side effects to Health Canada at 1-866-234-2345.

Report Problems to the Food and Drug Administration You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088. Need help identifying pills and medications? Use the pill identifier tool on RxList.