Will a vitamin d supplement be an effective treatment for lamictal induced deficiency?

Yes: Lamictal has a whole slew of potential side effects, but wasn't aware that vitamin d deficiency was one of them. No matter the cause, if you're vitamin d deficient an over the counter 2, 000 units of vitamin d3 daily is a very effective treatment with almost zero potential risk unless you have an elevated calcium level (which should be evaluated by your doc)/.

Lamictal does NOT cause vitamin D deficiency, and has NO interaction with this vitamin. If you have low blood level, take supplements, and recheck in 2-3 months. In spite of recent published levels by "experts", I fully disagree, and would aim for 50-70 ng/ml. serum levels.