Hi all, I was on 5 grains of Naturethroid but had to get off NDT to treat high night time cortisol and low iron. I am now on T3 alone, for almost 4 weeks, but my GP has prescribed Levothyroxine because he said my Free T4 was too low. I was just going to ask, to those on combination T4/T3, how do I add Levo to T3? I am currently down back to 15mcg of T3 a day as I realised I had made some mistakes and started on a very high dose, but I will be raising every week by 10mcg. I am scheduled for more blood tests in about 4 weeks time and am also due for dental surgery in the next few weeks so am hoping to get things under control by then. Thanks.