For months( since late May, 2016, I have suffered from constant nausea and diarrhea . Historically I started Cytomel by taking 1/2 of the smallest dosage daily. Several years ago my doctor increased the dosage to 3 tablets twice daily. In my own mind it seems Imay be taking too much. ( I missed a dose and the daily nausea did not commence. Along with this I have regular diarrhea and my hair has been thinning . I have felt horrible since early June 2016 from the constant nausea--it started with sensations of an abundance of butterflies in my lower stomach. I have had a colonoscopy, endoscopy CTScan and pill-cam test-- all negative. It occurred to me it could be the 75 mg of Cytomel a day. What say you? I have also had great weight loss.