- Allergic reactions have happened up to 4 days after this drug 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.
- It is used to treat asthma.
- It is used to treat hives.
- Do not use this drug to treat an asthma attack. Use a rescue inhaler. Talk with your doctor.
- If you have an allergy to omalizumab or any other part of this drug.
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
- Tell all of your health care providers that you take this drug. This includes your doctors, nurses, pharmacists, and dentists.
- This drug may add to the chance of getting some types of cancer. Talk with the doctor.
- Some people at high risk for parasite infections have gotten a parasite infection after taking this drug. Your doctor may test your stool to see if you have a parasite infection. Talk with your doctor.
- Allergic reactions have happened with this drug. The chance of an allergic reaction is higher in people who have had an allergic reaction to foods, other drugs, or other substances. Talk with the doctor.
- It may take a few months to see the full effect.
- If you are switching to this drug 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 this drug get fever; joint pain, stiffness, or swelling; muscle pain; swollen glands; or rash. This has happened within 1 to 5 days after getting this drug. Call your doctor right away if you have any of these signs.
- If you are taking this drug for asthma, check your weight weekly. Report a weight change to your doctor.
- Have blood work checked as you have been told by the doctor. Talk with the doctor.
- This drug may affect certain lab tests. Tell all of your health care providers and lab workers that you take this drug.
- Talk with your doctor before getting any vaccines. Use with this drug may either raise the chance of an infection or make the vaccine not work as well.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this drug while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
- 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 or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
- Signs of infection like fever, chills, very bad sore throat, ear or sinus pain, cough, more sputum or change in color of sputum, pain with passing urine, mouth sores, or wound that will not heal.
- A burning, numbness, or tingling feeling that is not normal.
- Bone pain.
- Trouble breathing that is new or worse.
- Very bad irritation where the shot was given.
- Some people taking this drug have had chest pain, heart attacks, “mini-strokes” or 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.
For all patients taking this drug:
- Upset stomach.
- Irritation where the shot is given.
- Feeling tired or weak.
- Nose and throat irritation.
- Signs of a common cold.
- Stomach pain.
- Throwing up.
- It is given as a shot into the fatty part of the skin.
- Call your doctor to find out what to do.
- If you need to store this drug at home, talk with your doctor, nurse, or pharmacist about how to store it.
- 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 a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Check with your pharmacist about how to throw out unused drugs.
- Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your doctor, nurse, 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.