I have a traumatic brain injury from the Iraq war. I also have a lot of other pain, from a C4 herniated disc, C5-7 spinal fusion, lower back pain, torn muscles in rotator cuff in right shoulder, etc. My doc prescribed Topomax to help me with my pain but it doesn t help. They will not give me pain meds due to my TBI because they contain caffeine. what else can they give me?