I Am Taking 100 Mg Of Lamotrigine At Bedtime And

I am taking 100 mg of lamotrigine at bedtime and oxbarbazine 600 mg 3 times a day. I have been on this dosage of Lamotrigine for 3 weeks and the Ocbarazine for a few years. I have had dizzy spells the last few days. Is this because of an interaction between the 2. I understand they serve the same purpose which is depression and peripheral neuropathy. I do not have high blood pressure or diabetes.