What is the Difference Between CIDP and GBS?

CIDP and GBS are very similar and are considered chronic counterparts of each other. However, CIDP is chronic and takes at least two months or longer to manifest itself. GBS on the other hand can manifest itself within 24 hours. When GBS becomes a chronic condition, it can be labeled as CIDP. GBS is also known as Acute inflammatory demyelinating polyneuropathy or AIDP.