I have an overactive thyroid which started two years ago, before diagnosis I was very ill and lost 6 stone in 3 months then I was diagnosed with hyperthyroidism I started taking Carbimazole 20 mg but was allergic to it and ended up with a rash all over my body, so I had radioiodine treatment, then I was put on 200 mg Levothyroxine and over a year the amount was reduced with regular blood tests eventually my levels are normal and I am on 150mg of Levothyroxine every day with regular blood tests, however for the last 6 months I have put 3 stone in weight on and no matter what I do the weight wont come off and indeed is increasing for no apparent reason.
Please help.