If your son truly has both Graves’ and Hashimoto’s, these are two autoimmune diseases that do the opposite thing. It means there are two sets of antibodies in his bloodstream ~ one that forces his body to be hyperthyroid, the other that forces his body to be hypothyroid. There are several people here who have both. In this case, what happens is that the antibodies kind of "take turns" being dominant. Typical advice, under these conditions, is to destroy the thyroid and stop the rollercoaster ride, then use replacement thyroid hormone, which the antibodies can’t affect. What meds has he been taking? The behaviors you mention are typically associated with the hyperthyroidism associated with Graves’, so my guess is that he was on methimazole or PTU. If he is going hyperthyroid, it’s very dangerous (which you know), and his father would be justified in taking him to the ER for a blood test to determine how hyperthyroid he is. It might scare him into compliance with the meds, and it would also bring his condition to the attention of the medical professionals. Your husband should bring up both names, Graves’ and Hashimoto’s, to prompt a test for both antibodies while they’re there as well.
I understand you’re in a panic, and this is a really difficult time. If your son makes it really difficult for your husband, he could call in the authorities to help get your son to the doctor. The tremors will probably be enough to convince them that he needs medical attention.
