I need all data you may have regarding Avonex, side effects etc. Avonex is very similar to Betaseron in chemical structure and hence side effect profile. The typical reaction on initiating the drug usually consists of low grade fevers, myalgias, and flu-like symptoms that can last for a day or so after the injection.
Some patients get headaches.
There tends to less of an injection site reaction with the Avonex. Also of concern for both drug preparations are elevations in liver enzymes, and reductions in the red blood cell or white blood cell counts. Although these adverse reactions occur at a low incidence, it requires regular blood testing to monitor any such complications or interferon-beta treatment. Answers have been provided by leading neurologists are intended for educational and informational use only. Comments are based on professional experience and do not represent therapeutic recommendation or prescription.