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
I take the bulk of my meds in the morning and I usually take half T3 at midday. However on the day prior to the test I the took half the T3 at 6 p.m.
On the day of the test I set out to have the blood drawn at 8 a.m. but ended up at the wrong clinic and had to phone Medichecks for the correct clinic. I finally found the clinic and had blood drawn at 9 a.m.
I have seen on another forum, an American Facebook for thyroid that blood should be drawn 12 - 15 hours after last dose. I don't know if this is right.
In March of this year my thyroid test results were:
TSH 0.01, FT4 18.7, FT3 5.5 same ranges and this was 14 hours after last dose. Blood taken at 8 a.m. after fasting and same dosage.
I find it difficult when I have to change times for dosing from midday to evening.
I have ongoing symptoms of periodically feeling cold, dry, 'tight' skin, constipation and a sore/painful throat that varies but doesn't go away. These symptoms worsen when I have to delay taking the midday T3. Any changes in timing affects me.
Supplements that I take are:
Adrenal Cortex, Vitamin C (500mg), B Complex, B12, Selenium, Vitamin D3 and K2, Magnesium, fish oil and collagen.
I am and have been hypo for some time and trying to find out why I am having a hard time finding wellness, hence the long list of blood tests.
Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.
Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.