Yes it will help. As previously stated, it may be the chronic form of GBS, typically requiring monthly IVIG therapy (I use the word typically to describe the cases I’m aware of). While it’s not a cure it can help offset symptoms. If she responded well to the first round and your physician is not convinced it’s CIPD, I’d ask him to prove you wrong by issuing another dose.

Your wife may also respond better to lyrica or tramadoyl as opposed to gabapentin. In our experience gabapentin did little to offset pain.