Extavia (Interferon Beta-1b Kit) Drug Overview of Side Effects and Precautions for Patients and Caregivers at RxList

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May 27, 2012

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SIDE EFFECTS: Injection site reactions (pain/swelling/redness), abdominal pain, constipation, diarrhea, upset stomach, and nausea may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

Most patients have flu-like symptoms such as headache, tiredness, fever, chills, and muscle aches when they first start this medication. These symptoms usually last about 1 day after the injection and improve or go away after a few months of continued use. You can reduce these side effects by injecting this medicine at bedtime and using fever reducers/pain relievers such as acetaminophen or ibuprofen before each dose. Consult your doctor or pharmacist for more information.

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 right away if you have any serious side effects, including: mental/mood changes (e.g., new or worsening depression, thoughts of suicide, psychosis), feeling too hot or cold (more than others around you), persistent tiredness, gradual change in weight (without a change in diet or exercise), easy bleeding/bruising, persistent nausea/vomiting, signs of infection (e.g., fever, persistent sore throat), stomach/abdominal pain, dark urine, yellowing eyes/skin.

Get medical help right away if any of these rare but very serious side effects occur: chest pain, seizures.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: 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.

PRECAUTIONS: Before using interferon, tell your doctor or pharmacist if you are allergic to it; or to products containing human albumin; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: blood cell disorders (e.g., anemia, neutropenia, thrombocytopenia), heart disease (e.g., angina, irregular heartbeat, congestive heart failure), liver disease, mental/mood disorders (e.g., depression, psychosis, suicidal thoughts), seizure disorder, thyroid disease, use/abuse of alcohol.

This medication is not recommended for use during pregnancy. Consult your doctor for more details.

It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.