trigeminal neuralgia
"I have suffered from intermittent Trigeminal neuralgia for 30 years, undiagnosed until 10 years ago. Mostly I've been treated with trileptal, but with the last two bouts I suffered from low sodium as a side effect as well as edema.  The trileptal was not controlling the symptoms well.  My doctor added gabapentin which immediately helped and allowed me to ease off the trileptal."