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 to decide if you should continue to receive it.
This medicine may cause serious types of allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Call your doctor right away if you or your child have a rash; itching; hoarseness; trouble breathing; trouble swallowing; or any swelling of your hands, face, or mouth while you are receiving this medicine.
Call your doctor or the emergency department right away if you or your child have a delayed allergic reaction or serum sickness, which may occur up to 14 days after receiving this medicine. The symptoms may include a rash, itching skin, fever, general feeling of discomfort or illness, joint or muscle pain, unusual tiredness or weakness, or swollen, painful, or tender lymph glands in the neck, armpit, or groin.
This medicine is made from horse blood. Some horse blood products have transmitted certain viruses to people who have received them. The risk of getting a virus from medicines made from horse blood has been greatly reduced in recent years. This is the result of required testing of horses for certain viruses, and testing during the making of these medicines. Although the risk is low, talk with your doctor if you have concerns.