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when next blood test is done

My doctor started changed my Medication and dosage for hypothyroidism to eltroxin 150 mcg due to TSH test being 14.88.  He gave me a lab slipto have my TSH and TPO antibodies done. How long do I wait to do the test.
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Avatar universal
Since it has already been almost 3 weeks, I'd wait another week.  That way the dosage change will be be at over 90% of its final effect on your blood levels.  Each time you go back for testing you should arrange to be tested for the biologically active thyroid hormones, Free T3 and Free T4, along with TSH.  If the doctor resists, then you should insist on it and don't take no for an answer.  

I say this because TSH is supposed to accurately reflect the levels of your thyroid hormones in the blood.  In reality, it cannot be shown to correlate adequately with either Free T3  or Free T4, much less with symptoms, which are even more important.  

Free T3 is the most important thyroid hormone test because FT3 largely regulates metabolism and many other body functions.  Scientific studies have shown that FT3 correlated best with hypo symptoms, while FT4 and TSH did not correlate.  So it is very important to know the level of your Free T3, and also Free T4.

A good thyroid doctor will treat a hypo patient clinically by testing and adjusting Free T3 and Free T4 as necessary to relieve symptoms, without being constrained by resultant TSH levels.  I think you can get some good insight into clinical treatment from this letter written by a good thyroid doctor for  patients that he sometimes consults with from a distance.  The letter is sent to the PCP of the patient to help guide treatment.

http://hormonerestoration.com/files/ThyroidPMD.pdf


Note especially the statement, "The diagnosis of thyroid insufficiency, and the determination of replacement dosing, must be based upon the patient’s symptoms first, and on the free T4 and free T3 levels second. The TSH test helps only to determine the cause."

Also note, "The ultimate criterion for dose adjustment must always be the clinical response. I have prescribed natural dessicated thyroid for your patient (Armour or Nature-Throid). These contain T4 and T3 (40mcg and 9mcg respectively per 60mg). They are more effective than T4 therapy for most patients. Since they provide more T3 than the thyroid gland produces, the well-replaced patient’s free T4 will be around the middle
of its range or lower, and the FT3 will be high-“normal” or slightly high before the AM dose."

I know this is much more info than you asked for, but I think it is vital for hypo patients to know about these things, in order to be adequately tested and treated.
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Avatar universal
I alwasy wait until it has been 6-8 weeks on the new dose before getting tested.
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Avatar universal
Sure, you can copy anything here.  Info such as this are our opinions based on what we have personally experienced and what we have learned from relevant scientific studies that we constantly search for and evaluate and then use in our posts here.

I use the link I gave above because it is from a doctor that I respect totally, and it kind of summarizes a lot of what we have learned from a variety of sources.  If you want more, I have a huge amount of references to studies that support what is told to members.  In fact, I have another great link for you, but I'm not able to post it here.  I will send by PM.
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1841872 tn?1324666089
gimel

Can I print what you have written here and show this to my Doctor?
She is very good about testing for whatever I ask and listening to what I have to say...but I still like my backing of reinforcements anyway.
Thanks Mia
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Avatar universal
I started the new dose on January 5, 2012.
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Avatar universal
When did you start the new dose of 150 mcg?
Helpful - 0
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