Thoracic, Thanks for sharing your response. I tried Tegritol and it made me sick. I am on neurontin now and in my situation the burning mouth has evolved into painful nasal passages and cheeks next to my nose ( sinuses). My pcp suspects that I have glosspharangeal neuralgia which involves a nerve thing next to the trigeminal nerves. My burning mouth has evolved into an unbearable, excruciating type of pain..it is unbearable. He has me on oxycodone temporarily until I get in to see the neurosurgeon he has referred me to in Atlanta. So I’m really hoping to get answers. It’s very scary.