Generic Name: belimumab (be LIM ue mab)
Brand Name: Benlysta
What is belimumab?
Belimumab is a monoclonal antibody that affects the actions of the body's immune system. Monoclonal antibodies are made to target and destroy only certain cells in the body. This may help to protect healthy cells from damage.
Belimumab is used in to treat active systemic lupus erythematosus (SLE) in adults.
Belimumab is not for use in people who have severe kidney problems caused by SLE, or have active SLE that affects the central nervous system (brain, nerves, and spinal cord).
Belimumab may also be used for other purposes not listed in this medication guide.
What is the most important information I should know about belimumab?
You should not use belimumab if you are allergic to it.
Before you receive belimumab, tell your doctor if you have an active or chronic infection, a history of cancer, or a history of depression or mental illness.
Serious and sometimes fatal infections may occur during treatment with belimumab. Call your doctor right away if you have signs of infection such as fever, chills, flu symptoms, night sweats, pain or burning when you urinate, cough with mucus, stabbing chest pain, feeling short of breath, bloody diarrhea, or swelling, pain, tenderness, or redness anywhere on your body.
Belimumab can lower blood cells that help your body fight infections. Your blood may need to be tested often. Avoid being near people who are sick or have infections.
Avoid being near people who have colds, the flu, or other contagious illnesses. Contact your doctor at once if you develop signs of infection. Do not receive a "live" vaccine within 30 days before or after you are treated with belimumab.
You may have thoughts about suicide while receiving belimumab, especially if you have a history of suicidal thoughts or actions. Report any new or worsening symptoms to your doctor, such as: depression, anxiety, mood or behavior changes, trouble sleeping, or thoughts about hurting yourself or others.
What should I discuss with my healthcare provider before receiving belimumab?
You should not use belimumab if you are allergic to it.
To make sure you can safely receive belimumab, tell your doctor if you have any of these other conditions:
an active or chronic infection;
a history of cancer; or
a history of depression or mental illness.
You may have thoughts about suicide while receiving belimumab, especially if you have a history of suicidal thoughts or actions.
FDA pregnancy category C. It is not known whether belimumab will harm an unborn baby. Tell your doctor if you are pregnant or plan to become pregnant while using this medication.
If you are pregnant, your name may be listed on a pregnancy registry. This is to track the outcome of the pregnancy and to evaluate any effects of belimumab on the baby.
It is not known whether belimumab passes into breast milk or if it could harm a nursing baby. You should not breast-feed while you are using belimumab.
How is belimumab given?
Belimumab is injected into a vein through an IV. You will receive this injection in a clinic or hospital setting. Belimumab must be given slowly, and the IV infusion can take about an hour to complete.
The first 3 doses of belimumab are given 2 weeks apart. Then the injections are given every 4 weeks. Your dosing schedule may be different. Follow your doctor's instructions.
You may be given other medications to prevent certain side effects of belimumab.
What happens if I miss a dose?
Contact your doctor if you miss an appointment for your belimumab injection.
What happens if I overdose?
Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.
What should I avoid while receiving belimumab?
Avoid being near people who have colds, the flu, or other contagious illnesses.
Do not receive a "live" vaccine while you are being treated with belimumab. The vaccine may not work as well during this time, and may not fully protect you from disease. Live vaccines include measles, mumps, rubella (MMR), Bacillus Calmette-Guérin (BCG), oral polio, rotavirus, smallpox, typhoid, yellow fever, varicella (chickenpox), H1N1 influenza, and nasal flu vaccine.
Belimumab side effects
Some people receiving a belimumab injection have had a reaction to the infusion (when the medicine is injected into the vein). Tell your caregiver right away if you feel nauseated, light-headed, itchy, or have muscle pain, severe headache, or slow heartbeats.
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have a serious side effect such as:
new or worsening depression, anxiety, mood or behavior changes, trouble sleeping, or thoughts about hurting yourself or others;
chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, general ill feeling.
wheezing, chest tightness, trouble breathing; or
Serious and sometimes fatal infections may occur during treatment with belimumab. Call your doctor right away if you have signs of infection such as:
fever, chills, flu symptoms, night sweats, weight loss;
increased urination, pain or burning when you urinate;
cough with yellow or green mucus, stabbing chest pain, feeling short of breath;
swelling, pain, tenderness, or redness anywhere on your body; or
Less serious side effects may include:
nausea, diarrhea, stomach pain;
mild pain in your arms or legs; or
mild cold symptoms such as stuffy nose, sneezing, sore throat.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
See also: Side effects (in more detail)
Belimumab dosing information
Usual Adult Dose for Systemic Lupus Erythematosus:
10 mg/kg IV at 2-week intervals for the first 3 doses and at 4-week intervals thereafter.
-Infuse over a 1-hour period.
-Consider premedication including an antihistamine, with or without an antipyretic, before the infusion.
Use: Treatment of adult patients with active, autoantibody-positive, systemic lupus erythematosus (SLE) who are receiving standard therapy.
What other drugs will affect belimumab?
Tell your doctor about all other medicines you use, especially:
cyclophosphamide (Cytoxan); or
drugs that weaken your immune system such as cancer medicine, steroids, and medicines to prevent rejection of a transplanted organ.
This list is not complete and other drugs may interact with belimumab. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.
More about belimumab
- Other brands: Benlysta
Related treatment guides
Where can I get more information?
- Your doctor or pharmacist can provide more information about belimumab.
- Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.
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