The immunomodulatory treatment of multiple sclerosis (MS) with high-dose intravenous immunoglobulins (IVIg) has been discussed with some controversy in the context of evidence-based medicine. The recent publication of eight trials investigating several aspects of MS has shed some more light on the role of IVIg treatment in MS. Here we summarize and critically discuss the new data in the context of previous studies on this treatment. In relapsing-remitting MS, IVIg remain a second-line treatment when other licensed treatments are not possible. Currently there is no role for IVIg in secondary progressive MS. Similarly, the use of IVIg during an acute relapse shows no benefit in addition to standard steroid treatment. The initiation of IVIg therapy after a clinically isolated syndrome has delayed the occurrence of definite MS, and this may become a new indication. Furthermore, previous data suggesting that IVIg can reduce the incidence of postpartal relapses have been substantiated. However, those trials unfortunately lack appropriate internal control groups. By and large, previous recommendations for the use of IVIg in MS are supported by the new data.