I have been taking Liothyronine for about 5 months I tried it with Levo at first but still felt really ill, so I asked the Endo to let me try Liothyronine on it's own he agreed to let me take 20mcg twice a day, and I felt so much better I felt as if I was on a high. I then had my anual medical at my GP surgery and my blood pressure was sky high. I was put on a 24 hour blood pressure monitor and then she priscribed Ramipril 5mg once a day. I now feel ill again although not the same as I did on Levo. I don't want to stop taking T3 only but I am scared that it is this that is causing the blood pressure to be high. Has anyone had this problem and if so I'd love some advice on this. Kathro.