I have an under active thyroid. I mentioned to my Dr that I had stopped taking HRT as it had been mentioned it was contra indicated with thyroxine. He was a little irritated and told me it was only theoretical. I did NOT remind him I was taking Premarin which is specifically identified as contraindicated, so perhaps he misunderstood, but is it specifically Premarin and if so what are the alternatives. I am developing Osteoporosis. Is there information that I can direct my GP to?