My CFS doctor suggested that I try thyoid med. for my CFS, after a whole range of pathology test results showed that I had low thyroid and very low cortisol levels. I checked out the info. on the net and in a few books and decided to give it a go. He said that it would take about 5 weeks to start to have an effect and he said he put me on low doses. I am currently taking liothyronine (cytomel T3) 30mcg combined with hydrocortisone 10mg daily. The 5 weeks is just about up. I am starting to sweat, get hot and I even think I am starting to go red. I have had heat sensitivity and sweating since I developed CFS, but it had settled down a lot. I found out that it might be because of overdosing on thyroid medication - but I am on such a low dose? Any ideas? Could it be something else? Is there anything to counter these effects, if they are side effects of the thyroid medication? I really want to give it a fair trial, but at the moment I just want to go and live in the refrigerator. I think I am contributing to global warming. Living in sunny Queensland with summer coming on is not a good place to be. All help appreciated as I believe we often know more than the doctors.