Thyroid Disorders Community
Free T4 Test Results
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This patient support community is for discussions relating to thyroid issues, goiter, Graves disease, Hashimoto's Thyroiditis, Human Growth Hormone (HGH), hyperthyroid, hypothyroid, metabolism, parathyroid, pituitary gland, thyroiditis, and thyroid Stimulating Hormone (TSH).

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Free T4 Test Results

Free T4 test results, 16.8,Normal range 4.8-13.9
47 Comments Post a Comment
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Avatar_m_tn
Well, your Free T4 result is well above the range.  Was that the only test done for you?   Please post any others, along with ranges.  

What symptoms are you having?  Have you been diagnosed with a thyroid problem?
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Avatar_n_tn
T3.6,normal 2.3-4.2
TSH-..36,normal-.36-3.74
Treated for hypothyroidism
Fainted & Fell3 times a night,insomnia, fatique
snythroid witched to 6 1/2 pills a wk.112Including tirosint in place of snythroid 2days  wk.
From .112  7 days a wk.
Cytomel 5mg.
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Avatar_n_tn
Thankyou for replying
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Avatar_m_tn
From those test results and limited info on symptoms, it appears that you are over medicated.  Has your doctor seen the test results?  If so, what was the doctor's reaction?  Do you have any other condition that might account for fainting?   What other medications/supplements are you taking and what dosage?
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Avatar_n_tn
lowered dosage snythroid 112  6 1/2days a wk
from .112 snythroid 7 days a wk
Dr lowered dosage after reaction to high dosage
symptoms:insomnia, night sweats, dizziness
dosage lowered 8./25
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Avatar_n_tn
Took Ambien 5mg night I fainted & fell.
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Avatar_m_tn
Well, obviously I wouldn't take any more Ambien.  I'd work on getting the Free T3 and Free T4 down in the range, instead of above the range.  

I am a bit confused by your average daily dosage over the whole week.  If you take all the T4 med for the whole week and divide by 7 days, what is the average daily amount that you were taking previously?  And what is the new daily dosage?  Was the T3 med eliminated entirely?

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Avatar_n_tn
cytomel 5mg did not change
.100 average
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Avatar_m_tn
If I understand correctly, you reduced your T4 from 112 daily to 100.  Is that correct?  If so, then I don't think the reduction in T4 is enough.  And why would you continue with the T3 med, since your Free T3, as I understand the results, is well over the range also.  I don't understand what your doctor is trying to do.
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Avatar_n_tn
Free T3 correction   3.6
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Avatar_n_tn
FreeT3 correction --3.6          Normal 2.3-4.2
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Avatar_n_tn
How much reduction do you think Dr. should prescribe?
Taking100mg since 8/25
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Avatar_n_tn
results faxed to endochronologist 9/10.  Called office for reply on snythroid amount dosage.  PCP did blood tests suggested dosage lowering.
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Avatar_m_tn
That correction on the Free T3 result changes the picture a lot.  Looking at your Free T4 being over the range substantially, and your Free T3 being about 68 % of its range, that means that you are not converting the T4 to T3 very well.  Your Free T3 has been driven up that high only by driving your Free T4 well above range.  

I expect that you could easily drop to 75 mcg of T4, but you need to discuss that with your doctor.  Be aware that as T4 dosage is decreased, your Free T3 is going to diminish also.  If it drops too much, you may see a return of hypo symptoms, requiring some T3 med to increase your Free T3.  

Another thing we haven't gotten into is that hypo patients frequently find that they are too low in the ranges for Vitamin D, B12, and ferritin.  So it would be a good idea to have those tested as well.  
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Avatar_n_tn
endo is having me not take snythoid for two days.Then he has given me new prescription of.100 daily.
This was just after I added symptoms today.of insomnia, dizzinees,fatigue,night sweats Before that he said it was high end of normal and manintain meds at current level.
He said.75mg was too great a change.
Vitamin D was low ,but lab  in june was normal.  I take 2000 Vit D.
Vitamin B12 was normal.
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Avatar_n_tn
This was  a total T4test,not a Free T4 test
TotalT4-16.8,normal-4.8-13.9
PCP office did wrong tes tI asked for FreeT4 test
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Avatar_m_tn
"Normal" is an inadequate description.  The range is far too broad to be functional from bottom to top.  B12 needs to be in the upper third of the range.  What was the actual number for B12?  Same question for Vitamin D.  You also need to test for ferritin at next opportunity.  I'll be surprised if the drop to 100 mcg of T4 is adequate, but time will tell.
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Avatar_n_tn
Well I took .75mcg today.  
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Avatar_n_tn
2 days no snythroid also,but think I will continue 75 mcg,since insurance won't pay for new snythroid for 2 weeks.Not going to skip 2 days
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Avatar_n_tn
Really light headed this evening.
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Avatar_n_tn
feeling faint
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Avatar_n_tn
took 3/4 pill .112 for 3 days.,,took.112mg sat,
slept 7 hrs fri nite
Taking .100mg sunday
son's wedding is oct 6 12 hrs away in Boston.  
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649848_tn?1357751184
I don't understand your dosing... You said your doctor thought a drop to 75 mcg was too much, then you said on the 12th (Thurs) that you would continue to take 75 mcg since insurance won't pay for a new script for 2 weeks; then yesterday you're saying that you took 112 mcg for 3 days and are taking 100 mcg on Sun...  Please be more specific about your actual prescribed dosage.  Is the cytomel, still part of your prescribed dosage and are you still taking it?

If your dosage is changed, your insurance should pay for a new script, without having to wait 2 weeks.  I've never known an insurance company to force a patient to stay on a dosage that's not right for them.  I've had dosages changed within days of getting a script refilled and my insurance has never denied it.  It's only the same script that they will only fill at certain intervals

It takes 4-6 weeks for any med/dosage change to take effect.  If the drop to 100 mcg isn't enough, you can talk to your endo about trying 88 mcg.  

The light headedness and feeling faint, most likely, has more to do with low blood pressure or low blood sugar, than with the thyroid med. You should contact your doctor if those symptoms persist, as they could indicate another serious condition.
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Avatar_n_tn
Took 3/4 of .112mg for3 days.  Now taking 100m.mg
Light headed,faintness much improved.
little sleep.slept 7 hrs after 3 days on 3/4of .112mg.,sleep
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Avatar_n_tn
still taking cytomel 5 mg
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649848_tn?1357751184
Is 100 mcg, the dosage prescribed by your doctor?
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Avatar_n_tn
yes
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Avatar_n_tn
Insomnia problems.asking Dr   for Resterol for insomnia. ambien not working.
Tookn1/2pill .112mg snythroid today,so I may sleep.
Tomorrow will ta e no snythroid to help sleep.
My End D rtold me to take no pills for 2 days to help with sleep.
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649848_tn?1357751184
If you have to stop taking your thyroid med in order to sleep, there's something very wrong with your treatment.  Starting and stopping the pills, along with constantly changing the amount you take each day is going to put you on a roller coaster that will be very hard to get off from.  
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Avatar_n_tn
I didn't stop the snythroid.  That recomendation didn't make sense.  I did take 1/2 of .112mg today,because I want sleep so badly.I did not sleep.
I am going on the .100,even though I would prefer.3/4of .112 or around 80mcg.
I agree that 88 mcg would be better,or 75mcg
The endoo office worker,Rachel & the endo would only give 100mg.
I usually sleep only1in3 nights for 4hrs.
Going to pcp for sleeping pill
I took 3/4 of .112mg because that's what I want my endo to prescribe.Took this for 3nights.
Think 88 mcg might be best dosage to stay on. Now to make my endo give me 88mcg.
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Avatar_n_tn
Thank you Barb & Gimmel for your help & responses
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649848_tn?1357751184
Hope you can get your endo to lower your dose to 88 mcg.  

Good luck
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Avatar_n_tn
Cutting my .112mg in 3/4 Sleepy all day. Using Restoril to sleep.at night.
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Avatar_n_tn
Trouble sleeping,but just started Restoril &it causes me to feel hungover all day.
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Avatar_n_tn
Stopping Restoril after taking couple days for sleep. Feeling hungover from
it.Trouble sleeping.
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Avatar_n_tn
Staying on 3/4 of.112 till I talk to endoto change dosage to .88mg.
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649848_tn?1357751184
You're stopping/starting your meds/dosages so often, I can't keep up with you.  You have to stay on them in order to give your body time to get used to them...

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Avatar_n_tn
3/4 of .112mgis 84 staying on this till Dr prescribes.88mcg
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Avatar_n_tn
Restoril is sleep as needed med.
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Avatar_n_tn
Oct 5 fly to son's wedding in Boston.  My Dr was keeping dosage at .100mg.
Need to stay awake for the wedding,reception in Boston.
Now Iwant to nap on & off all day.
Need to start upping snythroid to  .100mg to stay awak for wedding.
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Avatar_n_tn
Calling endo Monday again.  
I will take 3/4 of pill.112 tonight
Slept last 2 night.
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Avatar_n_tn
6/26
Vit D,  59, 30-100
Ferritin, 105,10-232
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649848_tn?1357751184
I guess you haven't yet talked to your endo?  

What was your actual B12 level?  Please post it, with reference range.  I know you said it was "normal", but your tiredness sounds more like a B12 deficiency, than a thyroid issue. As gimel pointed out, earlier, "normal" isn't good enough.
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Avatar_n_tn
Dr.office said take 100mg,no negotiating on dosage down.Dr. will not be abe to help me if I don't take his dosage.
6/26
B12 ,642,Normal 200-1100
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Avatar_n_tn
Dr said 100mg,or Dr can't help me any more.
B12,642,200-1100
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Avatar_n_tn
9/23 Symptoms sleeping every other night,fatigue
symptoms: 8/25 dizziness,sweating light headed,fatigue

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Avatar_n_tn
Felt calmer on .100mg following Dr's directions.
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