Generic Name: Omalizumab (oh mah lye ZOO mab)
Brand Name: Xolair
Medically reviewed by Drugs.com. Last updated on Nov 10, 2020.
- Allergic reactions have happened up to 4 days after Xolair (omalizumab) was given. Sometimes, these allergic reactions have been life-threatening. This has happened as early as after the first dose. It has also happened after a year of care. You will be watched closely after you get this drug. Tell your doctor right away about any anxiety, chest or throat tightness, cough, dizziness, fast or weak heartbeat, feeling warm, flushing, hives, hoarse voice, itching, passing out, rash, shortness of breath, swelling of the throat or tongue, trouble breathing or swallowing, wheezing, or any other bad effects.
Uses of Xolair:
- It is used to treat hives.
- It is used to treat asthma.
- Do not use Xolair (omalizumab) to treat an asthma attack. Use a rescue inhaler. Talk with your doctor.
What do I need to tell my doctor BEFORE I take Xolair?
- If you have an allergy to omalizumab or any other part of Xolair (omalizumab).
- If you are allergic to Xolair (omalizumab); any part of Xolair (omalizumab); or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had.
This medicine may interact with other drugs or health problems.
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Xolair (omalizumab) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Xolair?
- Tell all of your health care providers that you take Xolair (omalizumab). This includes your doctors, nurses, pharmacists, and dentists.
- If you have a latex allergy, talk with your doctor. Some products have latex.
- Cases of cancer have happened in some people taking Xolair (omalizumab). If you have questions, talk with the doctor.
- Some people at high risk for parasite infections have gotten a parasite infection after taking Xolair (omalizumab). Your doctor may test your stool to see if you have a parasite infection. Talk with your doctor.
- It may take a few months to see the full effect.
- If you are switching to Xolair (omalizumab) from a steroid, do not stop taking the steroid all of a sudden. The dose of the steroid may need to be slowly lowered to avoid side effects. Talk with the doctor.
- Some people using Xolair (omalizumab) get fever; joint pain, stiffness, or swelling; muscle pain; swollen glands; or rash. This has happened within 1 to 5 days after getting Xolair (omalizumab). Call your doctor right away if you have any of these signs.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take Xolair (omalizumab).
- Tell your doctor if you are pregnant, plan on getting pregnant, or are breast-feeding. You will need to talk about the benefits and risks to you and the baby.
How is this medicine (Xolair) best taken?
Use Xolair (omalizumab) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- It is given as a shot into the fatty part of the skin.
What do I do if I miss a dose?
- Call your doctor to find out what to do.
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- A burning, numbness, or tingling feeling that is not normal.
- Bone pain.
- Trouble breathing that is new or worse.
- Some people taking Xolair (omalizumab) have had chest pain, heart attacks, transient ischemic attacks (TIAs), or blood clots. It is not known if this drug caused these problems. Call your doctor if you have chest, jaw, or arm pain or pressure; passing out; shortness of breath; swelling, warmth, numbness, change of color, or pain in a leg or arm; or coughing up blood. Call your doctor if you have a change in strength on 1 side is greater than the other, trouble speaking or thinking, change in balance, or blurred eyesight.
What are some other side effects of Xolair?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
For all patients taking Xolair (omalizumab):
- Upset stomach.
- Irritation where the shot is given.
- Feeling tired or weak.
- Nose and throat irritation.
- Signs of a common cold.
- Pain in arms or legs.
- Ear pain.
- Stomach pain.
- Throwing up.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-332-1088. You may also report side effects at https://www.fda.gov/medwatch.
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Xolair?
- If you need to store Xolair (omalizumab) at home, talk with your doctor, nurse, or pharmacist about how to store it.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
- This medicine comes with an extra patient fact sheet called a Medication Guide. Read it with care. Read it again each time Xolair (omalizumab) is refilled. If you have any questions about Xolair (omalizumab), please talk with the doctor, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Frequently Asked Questions
- Is Xolair an immunosuppressant?
- Does Xolair cause weight gain?
- How long before Xolair starts working?
- How does Xolair work?
More about Xolair (omalizumab)
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Interactions
- Pricing & Coupons
- En Español
- 165 Reviews
- Drug class: selective immunosuppressants
- FDA Alerts (2)
- FDA Approval History