Ive got a fasting blood test on fri morning to check my thyroid condition and for diabetes. any one know if I should take my thyroxine on the morning of my test? the test is at 8.50am. Advice would be a great help?
thyroxine is a T4 med so it "shouldn't" make a difference. t3 meds peak hours after they are taken, but t4 does not. t4 takes weeks to build up, so one day or a few hours does not reflect in the labwork.