I found out I have Graves disease about a year and a half ago at age 17. I have been taking methimazole for the hyperthyroidism. At first I was taking a huge amount and gained quite a bit of weight. They been reducing the medication slowly over the past year and a half, Cause I was reacting so well to it. They are hoping I will go into remission. Yet with being so close to remission (Only taking 5 mg a day) I realize that I have lost weight which is strange. Before I found out I had hyperthyroidism I weighed 108, while taking it at the most I weight 128. Now I am almost back down to my original unhealthy weight 110. Is this normal for hyperthyroidism if your on medication that is suppose to help with that?