For T3 you should leave a gap of 8 - 12 hours. For levo, 24 hours. The day before your test you should adapt the timing of taking your hormone - that's what we all do.
As I said, adapt the timing. Either take it all 12 hours before the blood draw or split it just for that day and take the second dose 12 hours before the blood draw. Everyone does that.
Only the T3. The levo it's ok to leave a 24 hour gap. You might need to take it a bit later, but you can still take it in the morning. And, if I were you, I'd split the T3 the day before the blood draw and take the second dose at 9 pm. It's not difficult, just for one day.
We need to see the reference ranges for test results. Even though you feel great, if you need your TSH to be under 1 then we need to see where your levels lie within the range to see if there's room for an increase in dose. Repeat the tests with the correct timing then post new results with reference ranges.
Recommended on here that all thyroid blood tests should ideally be done as early as possible in morning and fasting. This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip, best not mentioned to GP or phlebotomist)
Last Levothyroxine dose should be 24 hours prior to test, (taking delayed dose immediately after blood draw).
If/when also on T3, make sure to take last dose 8-12 hours prior to test, even if this means adjusting time or splitting of dose day before test
Your FT4 is only mid range, perhaps you could manage dose increase in Levothyroxine
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