I have had some relief from Klonazapam (need script} but not nearly enough. Have had burning mouth for about 6 years. Had all the tests and blood work and was told at one point that it was nerve damage from heavy duty antibiotics post c-diff recurrences. I am trying R-Lipoic Acid which is a supplement. Read about this when you have the chance. I feel terribly that you or anyone else has to deal with this as doctors, dentists, GI specialists have no clue how to help.