Avonex side effects

What side effects can interferon beta-1a have?

Below you will find the most important information about possible known side effects of interferon beta-1a.
These side effects do not occur, but you can. Because every person reacts differently to medication. Please also note that the type and frequency of side effects may vary depending on the drug formulation (eg tablet, syringe, ointment).

Very common side effects:
changes in the blood count (white blood cell deficiency, lymphoid cell deficiency, platelet deficiency, neutrophil deficiency), anemia, skin reactions, skin inflammation at the injection site; Flu-like symptoms such as sweating, chills, headache, liver function elevation.

Common side effects:
nausea, diarrhea, vomiting, loss of appetite, insomnia, depression, emotional disorders, skin rashes (with redness and / or blistering), itching, flushing, nasal discharge, muscle pain, joint pain, pain at the injection site, fatigue, Muscle stiffness, muscle cramps, neck pain, pain in the arms and legs, fever, sweating, increased blood potassium concentration, increase in uric nitrogen.

Uncommon side effects:
Thyroid dysfunction, tissue destruction, swelling or ulcer at the injection site, burning at the injection site, hair loss, rule disorders.

Rare side effects:
respiratory distress.

Side effects without frequency:
platelet reduction, deficiency of all blood cells, thyroid dysfunction, anxiety, psychosis, confusion, emotional instability, suicide attempts, permanent muscle tension increase, fainting, dizziness, nerve disorders, migraine, seizures, cardiac arrhythmia, palpitations, palpitations, Heart disease, derailed myocardial insufficiency, vascular dilation, hepatitis, jaundice, skin rash, psoriasis deterioration, angioedema, muscle weakness, arthritis, systemic lupus erythematosus, allergic shock Thrombosis, antibody formation.

Special features:
Occasionally, cases of blockage of tiny blood vessels by blood clots may occur during treatment with the drug. They usually manifest as subcutaneous bleeding or as a so-called hemolytic uremic syndrome. Signs include platelet deficiency, sudden high blood pressure, fever, confusion and paralysis and impaired kidney function. It can also lead to a nephrotic syndrome. This is a non-specific kidney disease characterized by protein in the urine, impaired kidney function and fluid retention (edema). If it comes to the described side effects, a doctor is to be informed and the treatment to end.


Potential Avonex side effects may include: