I asked the private doctor who is now writing my prescriptions (but no more) if I could have a trial of T3. She said she would allow a mix of T3 and T4 only. I have today received 84 tablets equivalent to 1 grain of Nature Thyroid with the advice I take 1 grain twice a day; nothing about weaning myself off levothyroxine gently or introducing the NT slowly. I am currently on 100mcg and 125mcg levo on alternate days but feeling lousy! It says the dose she is asking me to take is the equivalent of 150 mcg. I know there have been posts on how to change over but I can't seem to find them. Could anyone with experience of changing over please advise me how I should do it? Thanks in advance.