Hello: i apologize if this is a bit scant but i just had to respond, just in case. My cousin’s daughter in Austria had a grand mal in 2016 (after many years of epilepsy), she was incoherent and in a wheelchair/bed for weeks Until my cousin transferred her to another hospital where it was determined that it was Hashimoto’s disease. Within days she was much better and has not had a seizure since. I don’t know what medication she takes but would be glad to ask. I wish you all the best with your son.