@MooseZoomer I had the same situation, have it but mildly now. got to a point where i was pretty sure i was close to death also. had extreme twitching rippling all over my body, heart pounding & beating erratically in crazy rhythm day to day, involuntary jolting & jolting out of sleep with adrenaline rushes etc. at its peak i wrote a note in case i died in my sleep
conclusion i got to is on a basic level its a major lack of atp production, fits with the timing of you stopping the medication
Ray wrote when the ATP production in the cell is high the cells can stay relaxed
When the cell is energized, by the mitochondria working with thyroid, oxygen, and sugar, these proteins rapidly change their form, binding calcium and removing it from the contractile system, allowing the cell to relax, to be fully prepared for the next contraction. If the calcium isn't fully and quickly bound, the cell retains extra water and sodium, and isn't able to fully relax.
^ in death your muscles seize up with atp depleted
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for me it was Vitamin D + magnesium that took it to an extreme. in some situations people convert vitamin D excessively to the 1,25 form and it potently stops mitochondria producing good amounts of ATP. In hypothyroidism people have higher 1,25 vitamin d. and in chronic inflammation through macrophages
i tried magnesium and pushed through with different forms because its commonly recommended for this, nope it accelerated things way worse. magnesium is used for enzymes that convert vit D forms.
when i stopped them both for a month or so the problem eased to about 10% ,
i noticed the twitching was worse in caloric deficit too (lower atp, and more vit D released from fat cells through lipolysis)
your low creatinine points to malnutrition, low muscle mass or or a failure to break down muscle for energy in low calories or low protein diet, how many calories do you get?
while u have this problem i would cut that milk intake / calcium in half at least if not more, likely way too much