My husband has been having low readings on his sodium levels since he has been on Trileptal. This med is known to bring down these levels. He has been on this med for 3 1/2 years. He is also on Primidone but has been weaning off of this for over 18 months now. He is doing that VERY slowly and hasn't had any problems. He has been on this nutrisystem diet for the past 9 weeks and has increased his liquid consumption. The other day, he had a seizure. It has been 20 years since the last one. They took him to the hospital and said his sodium was low. His neurologist claims this is a "breakthru" seizure and now increased the primidone. I truly believe it was caused by his low sodium. Has anyone else had any problems with this sodium levels and if so, what did you do about it. He now has to limit his liquids to 6 1/4 cups a day. He use to love his ice tea and drank it by the cupfuls. Can't do that anymore!