by Dr. James W. Stark

11/25/14 - Plegridy was recently approved by the FDA for the treatment of relapsing forms of MS and is now available for use. Plegridy is another interferon, specifically pegylated interferon B-1a. It is similar to other interferons currently available but is administered every two weeks by a subcutaneous injection. Side effects were similar to other interferons, however, because it is administered every two weeks, side effects were seen less frequently than with other interferon formulations.