Not indicated for idiopathic GBS, however some case reports (eg Wilgenhof S et al, Annals of Oncology 2011) show interesting results with ICPI induced GBS with methylprednisolone 1-2mg/kg. Among the neurology community discussion is ongoing if ICPI induced GBS is similar to chronic inflammatory demyelinating polyneuropathy (CIDP). The latter has a similar symptoms as GBS but has a slower onset and in contrast to GBS, for CIDP corticoids are indicated.