If you stop receiving omalizumab injections, your symptoms can be expected to return.
You may not see immediate improvement in your asthma after omalizumab treatment begins. It takes time for the medicine to work. It is important to continue your omalizumab injections until your doctor tells you otherwise.
This medicine may cause a serious type of allergic reaction called anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Tell your doctor right away if you have a rash, cough, chest tightness, shortness of breath, trouble breathing, wheezing, lightheadedness, dizziness, fainting, rapid or weak heartbeat, anxiety, flushing, itching, hives, feeling warm, swelling of the throat or tongue, throat tightness, hoarseness, or trouble swallowing after receiving this medicine.
A rare but serious condition called eosinophilia (increased white blood cells in the body) may occur while you are receiving this medication. A condition called vasculitis (inflammation of the blood vessels) may also be present. Eosinophilia can be serious and requires immediate medical attention. Tell your doctor right away if you have worsening lung symptoms, rash or bruising of the skin, fever, chest pain, or burning, tingling, or numbness in the hands and feet after receiving this medicine.
Your doctor will ask you to remain at the healthcare facility or clinic for at least two hours after each injection to watch for immediate side effects that can be serious.
Using this medicine may increase your risk of getting certain cancers or infections. Talk to your doctor if you have concerns about this risk.
Make sure any doctor or dentist who treats you knows that you are using this medicine. This medicine may affect the results of certain medical tests.