Hi Garyt, It’s been about 7 months since I had the RAI and it took 6 months to be hypo. Originally, I rec’d 23 millicuries (I’m serious) The first month I had worse symptoms of hyper. The endo didn’t really know what to expect with that dosage. He was concerned about my levels dropping too quickly. Anyway, my thryroid was tough, it took about 6 months to be hypo. Try to get alot of rest and no stress. Later on it’ll seem like that is all you do is sleep. Let us know how your doing? Take care, watch the cookies at xmas although I don’t think you have to eat anything to gain weight!