I recently tried raise my T3 very gradually, from 10mcg to 12mcg to start with, as my Free T3 is low within the range (I'm taking 75mcg Levy as well)...... but have experienced quite bad insomnia (can't get to sleep for several hours) for about a week now and wonder if it is caused by raising the T3, even though it is a very small dose. I do have high afternoon and evening cortisol and obviously have adrenal issues, so I wonder if the T3 is stressing my adrenals. I have tried Rhodiola and came out in an allergic rash.....also Ashwaganda, and it seemed to give me insomnia - everything that is supposed to lower cortisol seems to have an adverse affect on me. I wonder if I would benefit from an adrenal glandular, but am scared to experiment without expert guidance, as I read that it can have detrimental effects if used long term. Any advice would be much appreciated.