natalizumab - injection, Tysabri (cont.)
USES: This medication is used to treat a type of multiple sclerosis that occurs when symptoms appear in cycles of worsening and improvement (relapsing/remitting multiple sclerosis-MS). It is not a cure for MS, but it is thought to help by preventing your immune system from attacking the nerves in your brain and spinal cord. It helps decrease the number of episodes of worsening and may prevent or delay disability.Natalizumab is also used to treat a bowel condition called Crohn's disease (CD) when it is moderate to severe and/or keeps coming back. It is not a cure for CD, but it is thought to work by preventing your immune system from causing inflammation/swelling within your bowels.Natalizumab is a protein called a monoclonal antibody.
HOW TO USE: This medicine comes with a Medication Guide. Read it carefully before you start using natalizumab and each time you receive another dose. Ask your doctor, nurse, or pharmacist any questions that you may have about this medicine.This medication is given by a health care professional in an infusion center, usually every 4 weeks or as directed by your doctor. This medication is mixed in a solution and injected slowly into a vein, usually over 1 hour. It should not be given as a rapid injection. You will be monitored for 1 hour after your treatment is finished to make sure you do not have a serious reaction to the medication. (See also Side Effects section.)It is important to use this medication regularly to get the most benefit from it. Do not miss any doses without your doctor's approval.Tell your doctor if your condition worsens. When using this medication for Crohn's disease, if your condition does not improve after 12 weeks of treatment, your doctor will need to switch your treatment plan.
SIDE EFFECTS: Headache, joint pain, redness/irritation at the injection site, swelling hands/feet/ankles, or changes in menstrual cycle may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.Remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.Tell your doctor immediately if you have any side effects while this drug is being given or shortly after your treatment is finished. Examples of these side effects (infusion reaction) may include chills, fever, flushing, nausea, dizziness, tiredness, and chest pain.Tell your doctor immediately if any of these unlikely but serious side effects occur: severe/persistent headache, stiff/painful neck, fast/pounding heartbeat, signs of infection (such as fever, persistent sore throat, breathing problems, unusual vaginal discharge, painful/frequent urination), mood changes (such as depression, suicidal thoughts), severe stomach/abdominal pain.This drug increases the risk of a rare, possibly fatal, brain infection (see Warning section for more details). This condition may occur during treatment or, in some cases, after treatment has stopped. In MS patients, the symptoms of PML can seem like an attack of worsening MS. Therefore, whether you are using this drug or have stopped using it within the last 6 months, tell your doctor right away of any new or worsening symptoms that have lasted for several days such as: clumsiness, sudden change in your thinking (such as confusion, difficulty concentrating), difficulty moving muscles, seizure, problems with speech, vision changes.This drug may rarely cause serious liver problems. If you notice any of the following rare but very serious side effects, tell your doctor immediately: persistent nausea/vomiting, dark urine, yellowing eyes/skin, feeling tired/weak.A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any of the following symptoms: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.In the US -Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Medically Reviewed by a Doctor on 4/16/2014
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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.
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