Tositumomab injection may cause serious or life-threatening allergic reactions. Tell your doctor if you are allergic to medications made from murine (mouse) proteins, or if you are not sure if a medication you are allergic to is made from murine proteins. Also tell your doctor if you have ever taken a medication made from murine proteins. If so, you may be more likely to have an allergic reaction to tositumomab injection. Your doctor will order tests to see if you are likely to have an allergic reaction to tositumomab injection.
Tell your doctor right away if you experience any of the following symptoms of allergic reaction while you are receiving a dose of tositumomab injection or during the first few days after you receive a dose of tositumomab injection: rash; hives; itching; swelling of the eyes, face, lips, tongue, throat, arms, hands, feet, ankles, or lower legs; tightening of the throat; wheezing; difficulty breathing or swallowing; or redness, swelling, or tenderness in the place where the medication was injected.
Treatment with tositumomab injection may cause a severe or life-threatening decrease in the number of blood cells in your body.This decrease in blood cells may happen 4 to 7 weeks after your treatment with tositumomab injection and may last for 30 days or longer. This decrease in blood cells may cause serious or life-threatening bleeding or infection. Your doctor will not give you tositumomab injection if your blood cells have been severely affected by cancer or if you already have a low number of blood cells. Tell your doctor if you are taking any of the following medications: anticoagulants ('blood thinners') such as warfarin (Coumadin); aspirin and other nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen (Advil, Motrin) and naproxen (Aleve); and clopidogrel (Plavix). If you have any of the following symptoms, call your doctor right away: pale skin; weakness; shortness of breath; unusual bruising or bleeding; or sore throat, fever, chills, cough, and other signs of infection.
Tell your doctor if you are pregnant or plan to become pregnant. Tositumomab injection may harm the fetus. If you are a female, your doctor will order a pregnancy test to be sure you are not pregnant before giving you tositumomab injection. Tositumomab injection may damage reproductive cells in men and women, so you will need to use birth control to prevent pregnancy in you or your partner during your treatment and for up to 12 months after your treatment. Talk to your doctor about an effective method of birth control to use during treatment with tositumomab. If you or your partner becomes pregnant during or up to 12 months after your treatment with tositumomab injection, call your doctor immediately.
Tositumomab injection is a radioactive medication. It may only be given by doctors who have been trained to give radioactive medications and who have been certified by the manufacturer of tositumomab injection to give the medication.
Keep all appointments with your doctor and the laboratory. Your doctor will order certain tests to check your body's response to tositumomab injection during your treatment and for at least 10 weeks after your treatment.
Talk to your doctor about the risks of receiving tositumomab injection.
Tositumomab injection is used to treat non-Hodgkin's lymphoma (cancer that begins in the cells of the immune system) that has not improved or that had improved after treatment with other medications, but later returned. Tositumomab injection is in a class of medications called monoclonal antibodies with radioisotopes. It works by attaching to cancer cells and releasing radiation to damage the cancer cells.
Tositumomab injection comes as a liquid to be injected into a vein by a doctor who has been trained to treat patients with radioactive medication. It is given as part of a specific cancer treatment regimen. In order to receive the tositumomab injection treatment regimen, you will make 4 visits to the medical facility over 1 to 2 weeks. On the first visit, you will receive an infusion of tositumomab injection without radioactive material, followed by an infusion of tositumomab injection with radioactive material. The first infusion will last about 60 minutes, and the second infusion about 30 minutes. On the same day, you will undergo an imaging scan (test that shows a picture of all or part of the inside of the body) to see how tositumomab injection has spread through your body. On the second and third visits, you will undergo additional imaging scans to see how tositumomab injection has spread through your body. If tositumomab has spread through your body as expected, you will receive another infusion of tositumomab injection lasting 60 minutes, followed by an infusion of tositumomab injection with radioactive material lasting 30 minutes.
You may experience unpleasant symptoms during or shortly after your infusion with tositumomab injection. Your doctor will give you medication before you receive tositumomab injection to help prevent these symptoms. If you experience any of these symptoms, tell your doctor right away: fever, chills, sweating, shortness of breath, tightening of the throat, or nausea.
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.
Call your doctor immediately if you are unable to keep an appointment to receive tositumomab injection.
loss of appetite
back or neck pain
tiredness or sluggishness
feeling very uncomfortable in cold temperatures
pale, dry skin
thin, brittle hair and nails
muscle or joint pain or weakness
heavy menstrual periods
Some people who received tositumomab injection developed other forms of cancer including leukemia (cancer that begins in the white blood cells), myelodysplastic syndrome (condition in which blood cells do not develop normally), skin cancer, and other types of cancer or tumors. Talk to your doctor about the risks of receiving tositumomab injection.
Tositumomab injection may cause other side effects. Call your doctor if you have any unusual problems while receiving 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.
shortness of breath
unusual bruising or bleeding
sore throat, fever, chills, cough, and other signs of infection
Before having any laboratory test, tell your doctor and the laboratory personnel that you are receiving tositumomab injection or have received tositumomab injection in the past.
Ask your doctor or pharmacist any questions you have about tositumomab 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 - 03/01/2009
AHFS® Consumer Medication Information. © Copyright, 2013. 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.