I have the same thing. I notice when I do house work & are moving around I feel better but once I sit down the pain starts & doesn't go away. I am on 500 mg of Gabapentin & taking Cymbalta & they keep increasing the Gabapentin & it helps for a week & then the pain is back. I give up & I am not going to increase it anymore. Do you have to keep increasing the Imipramine like you do Gabapentin? I'm at my witts end & don't know what to do. Can this condition make your blood pressure rise? Mine has been going up & i do take meds for that. I have no idea how I got this but I do have back problems with the disks & was in a car wreck 10 years ago. I guess there is no way of knowing for sure. Please let me know if the Imiprinine helps? Thank you. best of luck to you. Genie