I am new to this website, but am relieved to discover that I am not alone in finding it difficult to get the right treatment for Hashimoto's. It seems that Levothyroxine (Euthroid) doesn't work very well for me. The symptoms - heart irregularity, hair loss, dizziness etc - have calmed down, but are still present. I still have no energy and often feel low. But the worst thing is that since I started taken the pills, I have constant pain and inflammation of the gut. Euthroid does not contain acaia or other alergens, so it can't be that. I wonder - is this a common side effect?