As I may have mentioned in the past, I have epilepsy in addition to CVID, and was diagnosed with it just a few years before my January 2010 CVID diagnosis. In 2009 I was put on a drug that seemed like a miracle to me (Trileptal...aka Oxcarbazapine), as it controlled my seizures with minimal side effects.
Fast-forward to May 2011, when I found a case study written by Dr. Charlotte Cunningham-Rundles (the leading CVID researcher in the country) linking Trileptal to the cause of CVID in a patient! I was shocked, confused, excited, and even a little bit heart-sick. I spent many days weighing which disease was easier to live with as I knew that my many sensitivities had ruled out most of the seizure drugs that would work on my kind of epilepsy. The thing that made me decide that epilepsy would be the better disease to have to live with was seeing what some of my CVID support group friends suffer with every day, and knowing that I'm not at that point yet but it could be in my future.
The patient in the case study was taking Trileptal to control pain, and once she was taken off of it her body started rebuilding antibodies within 2 months of stopping it, and had fully recovered except for IgA after 8 months. I then realized that the only way to find out whether Trileptal had caused the CVID would be to stop the taking it, but in order to find out whether my body was building its own antibodies would be to stop my IVIG treatments as well. That seemed like a completely impossible option, as I had just started a new job and didn't see any way I could change seizure drugs without going on extended medical leave while my body and brain adapted to new medications. I tried going onto Topamax with the intent of easing off of Trileptal, but my body didn't like that one at all. After a full week of constant intense nausea and not decreasing the Trileptal dose, my neurologist told me to stop the Topamax, and then he began research to find something else that I could take.
Time passed. In August I went to an allergist at Stanford to help me with my allergic reactions that I experience despite testing negative to allergens (because I have very low IgE due to the CVID). That Dr ran a test of my blood sodium level and found that it was dangerously low (121). He told me to get an emergency visit with my neurologist to get off of the Trileptal, as Trileptal is known for pushing blood sodium levels down in some people. Luckily, my neurologist had found a new seizure drug called Vimpat (Lacosamide) that seems to work well for me, is not on the list of seizure drugs that may cause CVID, and has minimal side effects...another miracle drug...I hope it is as good as it seems.
