Last update concerning my T3 trial (6.25 mcg/day)...(I just repeat that i am considered an Euthyroid person with Low T3 syndrome = Non Thyroid Illness syndrome)
Some things I noticed:
-of course I over did and exercised too much, and I got acute muscles pains in my thighs, so I now take cortisone, because this is the only drug that worked for this in the past...
-I still have good moments and especially good brain moments.
-The symptoms are cleared after about 1 hour, and go back after 9 hours but I can't take more than a dose/day.
I had a look at T3 pharmacocinetic (see below), which makes me wonder :
-why the action is so quick after my intake, (1 hours, versus 2-4 hours, and therapeutic peak within 2 days)
-why it is so short, (9 hours, versus therapeutic peak and half life 1-2 days)
-and why I need to wait before taking the next dose.(minimum 24 h00, but I may be more comfortable if I wait two days between, because I'm also very sensitive to excess, which makes me feel bad).
T3 is deactivated by deiodinases so it may be that I have an over active D3, which I already suspect as my rT3 is high (produced from T4 by D3 activity).
T3 is mainly bound to albumine in blood, so I may be lacking albumine which would increase my sensitivity to T3 (as only unbound T3 is active)... This thing will be easy to check!
"Onset
More rapid onset of action than levothyroxine.a c Following a single IV dose, metabolic response is detectable within 2–4 hours and peak therapeutic effects occur within 2 days.a b
Duration
Shorter duration of action than levothyroxine.a c
Distribution
Plasma Protein Binding
Circulating thyroid hormones are >99% bound to plasma proteins, including TBG, thyroxine-binding prealbumin (TBPA), and albumin. T3 is less extensively and firmly bound to TBG and TBPA than T4.b c Only unbound hormone is metabolically active.b c
Elimination
Metabolism
T3 is metabolized principally in the liver through deiodination to diiodothyronine.d i
Elimination Route
Thyroid hormones are primarily eliminated by the kidneys.b c
Half-life
Approximately 1–2 days.a e Plasma half-life is decreased in patients with hyperthyroidism and increased in those with hypothyroidism.a d"