@lsittll
Hi Laurie,
I believe you're taking zonisamide and not taking any of the major players of the meds that lower vit D if memory serves but forgot what else your on. However, many people that don't take seizure meds have low vit D so it may be okay but checking it never hurts. You may also want to ask your Neuro if taking B-Complex is necessary. One reason I mentioned that is because of vitamin B-9 (Folate) which helps produce normal red and white blood cells and helps them divide and helps produce DNA and other things.
To answer your question I currently take Carbatrol and Phenobarbital which are both enzyme inducing drugs that alter the way the body processes vitamin D.
Take care,
Jake