Plasma exchange (PE) and administration of intravenous immunoglobulin (i.v. IgG) are established treatments for Guillain-Barré syndrome (GBS). Combination treatment with elimination of postulated pathogenetic factors by PE or selective adsorption (SA) treatment and subsequent immunomodulation by intravenous IgG may provide a more effective treatment. In a single-center randomized study, 45 patients with acute GBS were prospectively examined using a clinical score. We treated 11 patients by PE, 13 with SA using a tryptophan-linked polyvinyl alcohol gel adsorbent, and 21 with SA followed by intravenous IgG. The patients treated sequentially by selective adsorption and intravenous IgG improved significantly better than the patients who received plasma treatment only. The results suggest that combination treatment of GBS may be superior to plasma treatment alone.