How long after RAI did you gain the 10 pounds? Was it gradual? Howw do you know you won’t gain more? Did it come on within weeks or after a few months? Sorry to ask all these weight questions, but I have always had a weight problem. I’m going to Weight Watchers now because since I was diagnosed with Graves I gained about 8 pounds (since Oct). I have lost 5 in the past month. I am going to an all-inclusive resort in Jamaica in June and you know what that could mean as far as weight gain (a lot of food and frozen pina coladas). Should I really start watching now. Oh, I do exercise 4 days a week – 2 days kickboxing and 2 days walking. If I gain weight from the RAI, I will just die!!!! Oh, how long after RAI, did you start the synthroid, if any?