Combined immunoglobulin and azathioprine in multiple sclerosis.

In an attempt to prevent exacerbations of multiple sclerosis, immunoglobulin therapy was combined with azathioprine (AZA). Intravenous immunoglobulin (i.v.IG) 2 g/kg was given in divided doses over 3 consecutive days followed by monthly booster doses (0.2 g/kg) for 3 years to 38 patients with relapsing-remitting multiple sclerosis (MS). In the 34 patients who completed the trial, the relapse rate decreased (from 1.7 relapses per year to 0 during the 3-year trial period). The Kurtzke Expanded Disability Status Scale decreased from 3.4 +/- 0.72 to 3.0 +/- 0.70. The results suggest that combined i.v.IG and AZA suppress the ongoing pathologic process in relapsing-remitting MS.