my sister who is 74 years old has been having burning pains in her face- which sound to me like tic douloureaux or trigeminal neuralgia ( she says her teeth were bleached several years ago and shethinks the bleaching damaged her teeth nerve roots) they have extracted almost all of her upper teeth, but she has had the pain apparently now for over a year, she is taking gabapentin but talking with her last night she sounded pretty depressed. I myself ha a peri-apical abcess for approximately 25 years before the migraines were resolved. my question is will the gabapentin react with b-viatmin therapy she had questioned me about my headaches, I think i'll tell her about b viaamins if its ok or to go to her doc with it for a trial. thanks