Forgot to mention, I am not sure what your Neurontin dosage is but normally a starting dose of Lyrica is 100mg 3 X a day. I am on 75mg 2 X a day for the next week like a said I only have taking it twice in 4 years, and i have only been on it a max of 1 month. I am not on any other medication so that is why the low starting dose for me. If you are on another med that is supposed to control your TN than maybe he wants you at a higher level of lyrica to meet what the neurontin level was. But I am not a dr. and it's just my thought. Hugs!