Hello, I have hypothyroidism. I was taking 175 mcg of Synthroid and felt too speedy and irritable. I started to take 150 mcg of Synthroid, of which I had an old supply of. I lost 5 pounds, my energy level was better, and so I went back to my doctor and had my blood tested after 3 weeks. I was told that my T3 and T4 were normal but my TSH is too low, therefore I need to go back to taking the 175 mcg I was prescribed. I was also given a scolding for not taking what I was prescribed. What should I do now? Obviously neither dose is perfect for me.