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Free T3/Free T4 Levels
Answered by
Mark Lupo, M.D. - Thyroid Nodules, Thyroid Cancer, hyperthyroidism, hypothyroidism, Thyroid Ultrasound
Thyroid & Endocrine Center of Florida Sarasota - FL
Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.

Free T3/Free T4 Levels

by LadyBlair64, Mar 07, 2007 12:00AM
Hi again. Here's the results of my FT3 Levels that werent' back yet:

FT3 240 (Ref: 230-420)

FT4 0.89 (0.58-1.64)

TSH 0.41 (0.34-5.60)

My question is: I am ALREADY ON 175 mcg. of Synthroid. I have done enough research to know that many of my symptoms are not alleveiated with the Free T's at the lower end of the ref. range. However, how do I get them to get higher without possibly throwing the TSH way down into hyper mode? At this moment, I don't feel ANY HYPER-THYROID problems in any way. Nothing. Not even nearly as much energy as I had B4 this hypo-hell began one year ago.

Any help is deeply appreciated again!!

Peace & Love to all......

by Mark Lupo, M.D., Mar 08, 2007 12:00AM
Consider combo t4/t3 treatment -- keeping the TSH around the range it already is -- this can be done with synthroid & cytomel OR with armour and working closely with a doc experienced with combo therapy.
Member Comments (2)

by Lake Lover, Mar 07, 2007 12:00AM
To: Lady Blair64
Your levels are still fairly low and alot of people on thyroid replacement with levels as low as you would still be experiencing hypo symptoms.

TSH can be affected based on when you took your meds before the blood draw.  I always make sure there is 24 hours from replacement ingestion and lab draw.  Once I forgot and only had 6 hours and my TSH came back much lower and I attribute it to having taken my meds so close to lab draw.


You could try another brand of replacement and see if your lab's change.  I know someone who had switched brands and all issues resolved.  Just be sure to lab 6 weeks after changing brands.

I use Unithroid and have been very pleased with it.
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