I started using 300mg of Trileptal than went to 1800mg a day bc the pain was so bad, but my sodium drop trastically so now im on Keppra. Trileptal helped but made me feel tired, nausea, and dizziness. Im so sick of all meds waiting to go get MRI and going to get gamma knife surgery. Have concerns about the procedure but have to try. Let me know if its a good idea to get gamma kinife. Much appreciate.