I have had an under-active thyroid for many, many years and have been on thyroid hormone (mostly synthetic). I was doing fairly well, but in 2000 my doctor said he thought I would feel a lot better on natural hormone instead of Synthroid, so we changed my pills. I started to get chest pains right away. He tried to switch me back to the Synthroid, but I still got really bad chest pains. He tried EVERY OTHER kind of thyroid on the market and they all gave me chest pains. He thinks it may have happened because I was also taking Tamoxifen at the time for breast cancer, since it also has an effect on the hormone systems. We stopped all thyroid for a while, and then I started getting severe chest pains on antibiotics! I finally stopped the Tamoxifen after 4 years instead of 5 to see if that would help. I still get chest pain on certain antibiotics (thankfully I found a few I can still take!) BUT still can not get back on thyroid hormone. I am so tired now, after 7 years, I am almost bed-ridden! I can hardly get my breath when going up steps, my legs feel like lead weights when I walk. Doctors look at me like they have never heard of this, like I'm the only person in the world that has ever has this happen. I am DESPERATE!!! Does anyone have any idea what's happening to me??????????? Thank you so much for any help you can give me.

pompano

the pills make me feel better,but if you are on a high dose,it will make you feel a little anxious.I suggest you take half your dose in the morning,and the other at night.you will feel better once you get use to the medicine.

paconinny

I have chest pains with my medication as well. So much so that I have been to the ER three separate occasions sure that I was having a heart attack. All three times I was discharged with no explanation of what could be causing my pain. I have had an elektrocardiogram (sorry no idea how to spell that), chest x-rays, a take home heart monitor, and three ekgs all come back normal. I was put on a very low dose of blood pressure medication and that seemed to help but after a while I stopped taking it because I was finally feeling normal again and I am only 28 and don't want to be on medication like that forever. Anyway, I was fine until recently when they changed my dosage of synthroid and then the pains in my chest came back with a vengeance. I have to just tell myself that I know that my heart is healthy and something else is going on to make me feel this way. I wish I could be of more help but you should ask your doctor about the blood pressure medication just in case. It may help you like it did me.