I can tell you about my experience with Graves’ disease. It may or may not be applicable to your situation. I was diagnosed with Graves’ disease (hyperthyroidism) in 2001. I was prescribed methimazole. I don’t recall any side effects with it. My endocrinologist did not feel that radioactive ablation was a good option for me. She also explained that sometimes over time the hyperthyroidism can change to hypothyroidism. In 2005 I had a pancreas transplant due to brittle, uncontrollable diabetes (different ailment, different story). At that time the methimazole medication was discontinued because it presented an interaction problem with the immune suppression meds required for being post transplant. At present I no longer have Graves’ disease. My endocrinologist continues to monitor my thyroid levels and I have not reversed to having hypothyroidism. I think diagnosing, monitoring and treating thyroid conditions can be tricky. Have you had anymore thoughts on finding a new endocrinologist?