The answer to this question depends upon whether the IV Ig or ACTH (acthar gel) is being used to treat an acute relapse, to reduce the chance of future relapses in patients with relapsing remitting multiple sclerosis or to prevent the accumulation of disability in any patient, particularly progressive patients:
Treatment of Acute Relapses:
Prevention of relapses in patients currently stable:
Prevention of the accumulation of disability in relapsing or progressive MS:
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