Blood Work- Best time to draw

[ras48]

I am going tomarrow to have t4 and THS. Is there a best time to have the blood drawn. I had it tested about a month ago THS was at 18 . Dr increased synthroid from 100 to 112.  I really feel that is not enough. I'm still having hypo symtems. I guess I just want not to do something to make false readings.

[ras48]

Thanks ever so much for your reply. What you say makes sence but I usually take meds very early AM. The lab I go to for testing is over an hour drive one way. I guess I won't need to go again for another month or so.Thanks again.      RAS

[Liz94]

I was on 100 mcg of synthroid and my TSH came back at 9.6 and he increased me to 150 mcg and 4 weeks later I'm at .32 and feel much better. But, I have read a lot of stuff that suggests increasing it at small increments is better because you don't want to be overmedicated. I have a feeling that my next test is going to show me hyper. Just a gut feeling.

[AR-10]

Early morning is best, before you take your meds.

As far out of whack as you are, the time of day isn't going to make much difference. To get a comparable reading, doing it about the same time of day as the last test would be acceptable.