I am sorry to learn your mom is still having so many attack. The only drug that ever worked for me was Tegretol. Sadly I had a severe allergic reaction to it. It is generally the first drug of choice for TN, but does carry risks that the Neurontin doesn't.

I am on 3600mgs of Neurontin....... 200 mgs is a very low dose and maybe she needs a gradual increase. Surgery, IMHO should be considered as a last resort after all other avenues have been explored.

Many fortunate people do find relief from surgery. But there are also those like myself, that the surgeries failed and left us with not only constant TN but other complications as well.

Talk to the doctor about changing and or adjusting her medication to try to help her with the pain.
Best wishes, Nikki