as fT4 is only a little bit over range , (assuming test was approx 24 hrs since last dose levo ?) Then if it was me , rather than reduce to 100mcg , i might first try reducing very slightly to 112.5mcg .
ie 125mcg / 100mcg on alternate days ... or cut a 25mcg in half to get 112.5mcg if you prefer to take same dose each day.
give that a couple of months to settle , then re-asses how you feel.
Well reducing your T4 dose may jeopardise your T3 reading which currently is coming in at just around 65% through the range :
Are you self medicating - if so I'd suggest staying put if well :
You could try dropping half a 25mcg tablet - 12.50 T4 - if concerned about this slightly over range T4 if there is pressure from your doctor to drop a full 25mcg dose.
Do you have results for ferritin, folate, B12 and vitamin D as these need to be maintained at optimal levels for good T4 to T3 conversion.
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