Precautions

Your doctor will check your or your child's progress closely while you are receiving this medicine. This will allow your doctor to see if the medicine is working properly and does not cause any unwanted effect. Blood tests may be needed to check for unwanted effects.

This medicine may cause serious allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Tell your doctor right away if you or your child has a rash, itching, lightheadedness, dizziness, or fainting, joint or muscle pain, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth after you get the injection.

Check with your doctor right away if you or your child has muscle or joint pain, fever, itching, or rash after receiving this medicine. These can be signs and symptoms of a delayed allergic reaction called serum sickness.

This medicine is made from horse plasma. Some horse blood products have transmitted viruses to people who have received them, although the risk is low. Talk to your doctor if you have any symptoms that concern you.

Tell your doctor right away if you or your child has unusual bleeding or bruising, blood in the urine or stool, heavy menstrual bleeding, or nosebleeds after receiving this medicine.