Siltuximab injection is used to treat multicentric Castleman's disease (MCD; abnormal overgrowth of lymph cells in more than one part of the body that may cause symptoms and may increase the risk of developing a serious infection or cancer) in people who do not have human immunodeficiency virus (HIV) and human herpesvirus-8 (HHV-8) infection. Siltuximab is in a class of medications called monoclonal antibodies. It works by blocking the action of a natural substance that causes increased growth of lymph cells in people with MCD.
Siltuximab injection comes as a liquid to be injected intravenously (into a vein) over 1 hour by a healthcare provider in a hospital or medical office. It is usually given once every 3 weeks.
You may experience a reaction when you receive siltuximab injection. If you experience a reaction, your healthcare provider will stop your infusion and will give you medication to treat your reaction. If your reaction is severe, your healthcare provider may not give you any more infusions of siltuximab. Tell your healthcare provider if you experience any of the following symptoms during or after your infusion: trouble breathing; chest tightness; wheezing; dizziness or light-headedness; swelling of the face, lips, tongue or throat; rash; back pain; chest pain; nausea; vomiting; flushing; reddening of the skin; or pounding heartbeat.
Siltuximab injection may help to control MCD but does not cure it. Continue to keep appointments to receive siltuximab injection even if you feel well.
Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
Unless your doctor tells you otherwise, continue your normal diet.
If you miss an appointment to receive a dose of siltuximab injection, call your doctor as soon as possible.
darkening of the skin
stomach pain or swelling
loss of appetite
mouth or throat pain
unusual bruising or bleeding
swelling of the hands, arms, feet, ankles, or lower legs
Siltuximab injection may cause other side effects. Call your doctor if you have any unusual problems while you are taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at http://www.fda.gov/Safety/MedWatch] or by phone [1-800-332-1088].
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your body's response to siltuximab injection.
Ask your pharmacist any questions you have about siltuximab injection.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.
Last Revised - 06/15/2014
AHFS® Consumer Medication Information. © Copyright, 2015. The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.