Medically reviewed by Drugs.com. Last updated on Aug 7, 2021.
Fatal infusion-related reactions may occur within 24 hours of rituximab infusion; approximately 80% of fatal reactions occurred with the first infusion. Monitor patients and discontinue rituximab infusion after severe reactions. Severe and potentially fatal mucocutaneous reactions can occur. Reactivation of hepatitis B virus (HBV) may occur; in some cases, it results in fulminant hepatitis, hepatic failure, or death. Screen patients for HBV infection prior to treatment. Progressive multifocal leukoencephalopathy (PML) and death can also occur .Intravenous route(Solution)
Warning: Fatal Infusion Reactions, Severe Mucocutaneous Reactions, Hepatitis B Virus Reactivation, and Progressive Multifocal LeukoencephalopathyFatal infusion-related reactions within 24 hours of rituximab infusion; approximately 80% of fatal infusion reactions occurred with first infusion. Monitor patients and discontinue rituximab-pvvr infusion for severe reactions.Severe mucocutaneous reactions, some with fatal outcomesHepatitis B virus (HBV) reactivation, in some cases resulting in fulminant hepatitis, hepatic failure, and deathProgressive multifocal leukoencephalopathy (PML) resulting in deathIntravenous route(Solution)
Fatal infusion reactions may occur within 24 hours of rituximab infusion; approximately 80% of fatal reactions occurred with the first infusion. Monitor patients and discontinue rituximab-abbs infusion for severe reactions. Severe and potentially fatal mucocutaneous reactions can occur. Reactivation of hepatitis B virus (HBV) may occur with some cases resulting in fulminant hepatitis, hepatic failure, or death. Screen patients for HBV infection prior to treatment. Progressive multifocal leukoencephalopathy (PML), including fatal PML, can also occur .Intravenous route(Solution)
Warning: Fatal Infusion-Related Reactions, Severe Mucocutaneous Reactions, Hepatitis B Virus Reactivation, and Progressive Multifocal LeukoencephalopathyFatal infusion-related reactions within 24 hours of rituximab infusion; approximately 80% of fatal reactions occurred with first infusion. Monitor patients and discontinue rituximab-arrx infusion for severe reactions.Severe mucocutaneous reactions, some with fatal outcomes.Hepatitis B virus (HBV) reactivation, in some cases resulting in fulminant hepatitis, hepatic failure, and death.Progressive multifocal leukoencephalopathy (PML) resulting in death .
Commonly used brand name(s)
In the U.S.
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Therapeutic Class: Antineoplastic Agent
Pharmacologic Class: Monoclonal Antibody
Uses for rituximab
Rituximab injection is used alone or together with other medicines to treat a type of cancer called non-Hodgkin's lymphoma (NHL). It is also used in combination with other cancer medicines to treat mature B-cell non-Hodgkin's lymphoma (NHL) and mature B-cell acute leukemia (B-AL). It helps the immune system destroy cancer cells. Rituximab injection is a monoclonal antibody.
Rituximab injection is used together with other medicines (eg, fludarabine cyclophosphamide) to treat chronic lymphocytic leukemia (CLL).
Rituximab injection is used together with methotrexate to treat the symptoms of rheumatoid arthritis. It helps to keep joint damage from getting worse after other medicines (eg, adalimumab, etanercept, or infliximab) did not work well.
Rituximab injection is used together with steroids to treat granulomatosis with polyangiitis (GPA) and microscopic polyangiitis (MPA). These are immune disorders that cause blood vessels to be inflamed.
Rituximab injection is also used to treat moderate to severe pemphigus vulgaris (PV), an immune disorder that causes painful blisters on the skin and mucous membranes.
Rituximab is to be given only by or under the direct supervision of your doctor.
Before using rituximab
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For rituximab, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to rituximab or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of rituximab injection in children. However, use of rituximab injection is not indicated in children younger than 2 years of age with GPA or MPA, in children younger than 6 months of age with mature B-cell NHL and B-AL, or in children with other conditions.
Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of rituximab injection in the elderly. However, elderly patients are more likely to have infections and age-related heart and lung problems, which may require caution in patients receiving rituximab injection.
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Interactions with medicines
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are receiving rituximab, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using rituximab with any of the following medicines is not recommended. Your doctor may decide not to treat you with this medication or change some of the other medicines you take.
- Measles Virus Vaccine, Live
- Mumps Virus Vaccine, Live
- Rotavirus Vaccine, Live
- Rubella Virus Vaccine, Live
- Varicella Virus Vaccine, Live
- Zoster Vaccine, Live
Using rituximab with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Adenovirus Vaccine
- Bacillus of Calmette and Guerin Vaccine, Live
- Cholera Vaccine, Live
- Dengue Tetravalent Vaccine, Live
- Influenza Virus Vaccine, Live
- Poliovirus Vaccine, Live
- Smallpox Vaccine
- Typhoid Vaccine, Live
- Yellow Fever Vaccine
Using rituximab with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
- Influenza Virus Vaccine (Subvirion)
- Pneumococcal Vaccine Polyvalent
Interactions with food/tobacco/alcohol
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other medical problems
The presence of other medical problems may affect the use of rituximab. Make sure you tell your doctor if you have any other medical problems, especially:
- Angina (chest pain), history of or
- Heart disease or
- Heart rhythm problems (eg, arrhythmia), history of or
- Hepatitis B, or history of or
- Infection (eg, bacteria, fungus, or virus) or
- Kidney disease or
- Lung problems (eg, asthma, bronchitis), history of or
- Stomach or bowel problems (eg, intestinal blockage, perforation, ulcers)—Use with caution. May make these conditions worse.
- Hypogammaglobulinemia (immune system disorder), prolonged—Use with caution. May increase risk for infections.
- Infection, severe and active—Should not be used in patients with this condition.
Proper use of rituximab
Before receiving rituximab, make sure you understand all the risks and benefits from receiving the medicine. It is important for you to work closely with your doctor during your treatment.
A nurse or other trained health professional will give you rituximab in a medical facility. It is given through a needle placed into one of your veins. The medicine must be given slowly, so the needle will have to remain in place for 90 minutes.
You may also receive other medicines (eg, fever medicine, allergy medicine, or steroid) at least 30 minutes to 60 minutes before starting treatment with rituximab to help prevent unwanted side effects.
Rituximab should come with a Medication Guide. Read and follow the instructions carefully. Ask your doctor if you have questions.
Precautions while using rituximab
It is very important that your doctor check your progress at regular visits to make sure that rituximab is working properly. Blood and urine tests may be needed to check for unwanted effects.
Receiving rituximab while you are pregnant can harm your unborn baby. If you are a woman who can get pregnant, your doctor may do tests to make sure you are not pregnant before giving you rituximab. Use an effective form of birth control to keep from getting pregnant during treatment with rituximab and for at least 12 months after the last dose. If you think you have become pregnant while receiving rituximab, tell your doctor right away.
Rituximab may cause infusion-related reactions, which can be life-threatening and require immediate medical attention. Tell your doctor right away if you start to have a fever, chills or shaking, dizziness, trouble breathing, itching or rash, lightheadedness or fainting after receiving rituximab.
Rituximab can cause a hepatitis B infection to come back. Check with your doctor right away if you have any symptoms of liver problems, including skin and eyes turning yellow, dark brown-colored urine, right-sided abdominal or stomach pain, fever, or severe tiredness.
Serious skin and mouth reactions (eg, paraneoplastic pemphigus, Stevens-Johnson syndrome, lichenoid dermatitis, vesiculobullous dermatitis, and toxic epidermal necrolysis) can occur during treatment with rituximab. Check with your doctor right away if you have blistering, peeling, or loosening of the skin, chills, cough, diarrhea, itching, joint or muscle pain, red irritated eyes, red skin lesions, often with a purple center, sore throat, sores, ulcers, or white spots in the mouth or on the lips, or unusual tiredness or weakness while you are receiving rituximab.
Rituximab may cause a rare and serious brain infection called progressive multifocal leukoencephalopathy (PML). The risk for getting this infection is higher if you have rheumatoid arthritis. Talk to your doctor about the benefits of receiving rituximab and the risk for this infection. Check with your doctor right away if you have vision changes, loss of coordination, clumsiness, memory loss, difficulty speaking or understanding what others say, and weakness in the legs.
Rituximab may cause a serious type of reaction called tumor lysis syndrome (TLS). Your doctor may give you a medicine to help prevent this. Call your doctor right away if you have a decrease or change in urine amount, joint pain, stiffness, or swelling, lower back, side, or stomach pain, a rapid weight gain, swelling of the feet or lower legs, or unusual tiredness or weakness.
Rituximab may increase your risk of developing infections (eg, viral, bacterial, or fungal) during or after treatment with rituximab. Avoid being near people who are sick or have infections while you are using rituximab. Wash your hands often. Tell your doctor if you have lupus or if you have any kind of infection before you start using rituximab. Also tell your doctor if you have ever had an infection that would not go away or an infection that kept coming back.
Call your doctor right away if you start to have a cough that won't go away, weight loss, night sweats, fever, chills, flu-like symptoms (eg, runny or stuffy nose, headache, blurred vision, or feeling generally ill), painful or difficult urination, or sores, ulcers, or white spots in the mouth or on the lips. These may be signs that you have an infection.
While you are being treated with rituximab, and after you stop treatment with it, do not have any immunizations (vaccinations) without your doctor's approval. You may receive non live vaccines at least 4 weeks before starting treatment with rituximab. Rituximab may lower your body's resistance, and there is a chance you might get the infection the immunization is meant to prevent. In addition, other persons living in your household should not get live vaccines (eg, nasal flu virus vaccine). Try to avoid persons who have taken live vaccines. Do not get close to them and do not stay in the same room with them for very long. If you cannot take these precautions, you should wear a protective face mask that covers the nose and mouth.
Rituximab may cause heart and heart rhythm problems (eg, heart attack, arrhythmia, cardiogenic shock). Check with your doctor if you have chest pain or discomfort, pain or discomfort in the arms, jaw, back, or neck, dizziness, fainting, fast, slow, or irregular heartbeat, cool, sweaty skin, or trouble breathing.
Check with your doctor right away if you have bloody urine, a decrease in frequency or amount of urine, an increase in blood pressure, increased thirst, loss of appetite, lower back or side pain, nausea, swelling of the face, fingers, or lower legs, trouble breathing, unusual tiredness or weakness, vomiting, or weight gain. These could be symptoms of a serious kidney problem.
Rituximab may cause serious stomach and bowel problems, especially when used with other cancer medicines. Check with your doctor right away if you start having stomach pain while being treated with rituximab.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.
Rituximab side effects
Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor or nurse immediately if any of the following side effects occur:
- Back pain
- black, tarry stools
- bleeding gums
- bloating or swelling of the face, arms, hands, lower legs, or feet
- blood in the urine or stools
- blurred vision
- body aches or pain
- burning or stinging of the skin
- chest pain or tightness
- difficulty with breathing
- dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
- dry mouth
- ear congestion
- flushed, dry skin
- fruit-like breath odor
- hives or welts, itching, rash
- increased hunger
- increased thirst
- increased urination
- large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or genitals
- lower back or side pain
- noisy breathing
- pain or tenderness around the eyes and cheekbones
- painful cold sores or blisters on the lips, nose, eyes, or genitals
- painful or difficult urination
- pale skin
- pinpoint red spots on the skin
- pounding in the ears
- slow or fast heartbeat
- sore throat
- sores, ulcers, or white spots in the mouth or on the lips
- stomach pain
- stuffy or runny nose
- swelling of the tongue or throat
- swollen glands
- tingling of the hands or feet
- trouble breathing
- unusual bleeding or bruising
- unusual tiredness or weakness
- unusual weight gain or loss
- Blistering, peeling, or loosening of the skin
- blisters on the trunk, scalp, or other areas
- burning, crawling, itching, numbness, prickling, “pins and needles”, or tingling feeling
- decreased frequency and amount of urine
- difficulty with moving
- feeling sad or empty
- irregular heartbeat
- joint or muscle pain
- loss of appetite
- loss of interest or pleasure
- lump or growth on the skin
- muscle cramp, pain, or stiffness
- numbness or tingling in the hands, feet, or lips
- painful blisters on the trunk of the body
- pain or redness at the injection site
- pain, swelling, or redness in the joints
- pounding or irregular heartbeat or pulse
- red skin lesions, often with a purple center
- red, itchy lining of the eye
- redness of the face, neck, arms, and occasionally, upper chest
- stabbing pain
- trouble concentrating
- trouble sleeping
Incidence not known
- Blue-yellow color blindness
- blurred vision or other change in vision
- burning or stinging of the skin
- decreased vision
- dilated neck veins
- dry cough
- extreme tiredness or weakness
- eye pain, tearing
- feeling of discomfort, illness, or weakness
- irregular breathing
- painful cold sores or blisters on the lips, nose, eyes, or genitals
- sensitivity of the eye to light
- severe stomach pain
- severe vomiting, sometimes with blood
- sores, welts, or blisters
- stomach cramps
- swelling, stiffness, redness, or warmth around many joints
- swollen lymph glands
- vision loss
Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
- lack or loss of strength
- loss or thinning of the hair
- night sweats
- throat irritation
- Agitation or anxiety
- bone pain
- burning, dry, or itching eyes
- change in taste
- discharge, excessive tearing
- dry eyes
- excessive muscle tone
- feeling of constant movement of self or surroundings
- increase in body movements
- muscle tension
- redness, pain, or swelling of the eye, eyelid, or inner lining of the eyelid
- sensation of spinning
- swelling of the stomach
Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.
Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.
Frequently asked questions
- What are the new drugs for the treatment of rheumatoid arthritis (RA)?
- How many biosimilars have been approved in the United States?
- What is the difference between Truxima and Rituxan?
- What is the success rate of Rituxan (rituximab) in patients with blood cancers?
- What causes infusion reactions to rituximab?
- What is the success rate of Rituxan (rituximab) in rheumatoid arthritis?
- Are lung nodules common after Bendeka & Rituxan therapy?
More about rituximab
- Side Effects
- During Pregnancy or Breastfeeding
- Dosage Information
- Drug Interactions
- Compare Alternatives
- En Español
- 110 Reviews
- Drug class: antirheumatics
- Drug Information
- Rituximab-abbs Intravenous (Advanced Reading)
- Rituximab-arrx Intravenous (Advanced Reading)
- Rituximab-pvvr Intravenous (Advanced Reading)
Related treatment guides
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.