I was diagnosed with hyperthyroidism about 8 years ago, not because I was feeling unwell, but as the result of a blood test for something else which showed higher than normal cholesterol (approx 6), which led to a thyroid test. I was initially prescribed 25 mcg of Levothyroxine, subsequently raised to 50 mcg where it has stayed. I have never felt unwell, as many people seem to, with this disorder and have just accepted my G.P's advice but I'm beginning to wonder whether I should be more proactive and question more deeply whether I really need this medication and what exactly is causing the disorder. When I read American sites, they mention numerous other blood tests for liver function etc. and I'm sure that all I ever have is a TSH test. Should I be asking more questions and, if so, what?