I have Hashimoto and recently managed to get a referral to an endo. I got T3 as I have conversion issues. At the time of appointment he increased my levo from 100 to 125 mcg daily. then I got a letter saying to reduce it back to 100mcg and add 10mg of T3. I take 2 x 5mg pill one in morning one at lunch time. I started a week ago today. I have been feeling very tired and sleepy, dizzy and since yesterday breathless as well. I do have low cortisol so to support adrenals I have been taking ACE 1x2 daily but increased it to 2x2 last few days in hope to feel a bit better. I am at loss what to do now, but dont feel well. Keep taking it? stop it? is it just the initial side effect? Please help!