What is the effect of switching to a higher dosage of interferon beta-1a (Avonex or Rebif) in the treatment of relapsing-remitting multiple sclerosis (MS) (RRMS)?

Updated: Oct 08, 2019
  • Author: Christopher Luzzio, MD; Chief Editor: Jasvinder Chawla, MD, MBA  more...
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In a subsequent crossover phase of the EVIDENCE trial, patients who were originally randomized to low-dose weekly treatment were switched to the high-dose 3-times-weekly regimen for an additional 8 months. These patients demonstrated significant reductions in mean relapse rates compared with the last 6 months on Avonex (P< .001). [92]

In patients with uncontrolled depression, interferons should be used with caution. Glatiramer may be an appropriate choice in such cases.

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