There is plenty of room to increase your dose of T3 but you should wait more than a week before increasing again. Personal anecdote since being on a reasonable amount of T3 (18.75mcg) - I have found that when I have increased my T3 I actually need 8 weeks, even 6 weeks isn't enough to reflect the change, but of course that doesn't apply to everyone.
Your FT3 level may start to change after a week but personally I need 8 weeks for it to stabilise and me to know exactly what level that dose change achieves.
Yes I agree, it normally takes me 2-3 months to feel the full effect of a T3 increase, six weeks a little improved but if I wait another six weeks, it's even better
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