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Doctor insights on: Got T3

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What does it mean if I got T3 (liothyronine) test results above the upper limit of reference range and TSH and T4 are in between the range?

What does it mean if I got T3 (liothyronine) test results above the upper limit of reference range and TSH and T4 are in between the range?

Probably fine: Reference range is where most people fall. This may simply be the way you are put together. If you have no symptoms of thyroid disease, i'd not be concerned unless your personal physician is. I'm glad you're taking this proactive approach to your health. Good luck. ...Read more

Dr. Jesse Krakauer
458 doctors shared insights

Liothyronine (Definition)

Liothyronine is a thyroid ...Read more


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I have hypothyroid from 6 months and recently when tested got t3-1.25, t4-8.54, tsh-0.018..Is it dangerous to hav such low TSH and do it affect fertilit?

I have hypothyroid from 6 months and recently when tested got t3-1.25, t4-8.54, tsh-0.018..Is it dangerous to hav such low TSH and do it affect fertilit?

It depends: I assume you are taking thyroid hormone for your diagnosis of hypothyroidism. The low TSH tells us that you are taking too much thyroid hormone. However, the normal T4 and T3 (liothyronine) levels tell us that you need only a slightly lower dose. Any time the thyroid level is off, it can affect fertility, so you want to have it normal. ...Read more

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I got tsh/t3/t4 checked. T3 (liothyronine) is abnormal the other 2 are fine. Song endocrinologist in August. Cancer is in remission but really concerned please help?

Thyroid labs : Hi. If TSH was normal, you should be fine. Endo's only test FREE T4, so if it was normal too, even better. Both total T3 (liothyronine) and free T3 (liothyronine) can have caveats to their interpretation, but if free T4 and TSH are normal, I'd conclude it's not your thyroid. Bear in mind, Armour thyroid has lot-to-lot variability, and contains T3 (liothyronine), so you might be better on l-thyroxine. I'm glad the cancer's doing well! ...Read more

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26 yr old and 54 kgs on eltroxin 100 mcg from 2 mnth got tested then T3 (liothyronine) and T4 normal but TSH is 0.138. So what should I do?

26 yr old and 54 kgs on eltroxin 100 mcg from 2 mnth got tested then  T3 (liothyronine) and T4 normal but TSH is 0.138. So what should I do?

Decrease dose: If I am reading this correctly, it looks like your TSH level was 0.138 while taking l-thyroxine 100 mcg daily. If this is correct, it means you are on too much and will need to decrease the dose, probably to 88 mcg daily. You should contact your doctor about this. ...Read more

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My mom got her thyroid tested. T3 (liothyronine) & T4 are normal but TSH is 16.7. Any concerns?

My mom got her thyroid tested.  T3 (liothyronine) & T4 are normal but TSH is 16.7. Any concerns?

Yes: A high TSH suggests thyroid hypo-function. Tsh often changes before t3 (liothyronine) and t4. If would be prudent to consult your doctor for thyroid supplementation. Please note that all lab results need to be interpreted in the clinical context and the doctor who ordered the test is usually in the best position to do that. ...Read more

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I was goofing around and took a bunch of t3's. How much can a person take before overdosing?

I was goofing around and took a bunch of t3's.  How much can a person take before overdosing?

Be careful: People almost never get seriously sick from taking a few extra T3 (liothyronine) (thyroid) tablets; this is actually fairly common. The only approach to weight loss that actually works is a combination of (1) realizing the food industry is playing you, and (2) finding some kind of aerobic activity that you actually enjoy & can share with friends / partner. Good luck. ...Read more

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What is the T3 (liothyronine) test ?

What is the T3 (liothyronine) test ?

T3 (liothyronine): It's part of checking your thyroid function. T3 (liothyronine) is the active thyroid hormone your body uses. Other components include t4, tsh, free t4, and sometimes reverse t3 (liothyronine) and thyroid antibodies. ...Read more

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Can I take nyquil 4 hrs after taking T3's?

Depends on your: body size, tolerance to meds, previous exposure, etc. If you are average size and have taken these meds before, it should be ok. You might want to take half dose first, if you want to make sure. ...Read more

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What was meant for low in t3 (liothyronine)?

Possibly nothing: If your other thyroid tests are normal, the low T3 (liothyronine) is probably irrelevant. T3 (liothyronine) levels in the cell are what's important, not in the blood stream -- except for highly elevated T3 (liothyronine) which can indicate an overactive thyroid. ...Read more

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What does a high T3 (liothyronine) in a kid mean?

What does a high T3 (liothyronine) in a kid mean?

Thyroid hormones: It would be an easier answer if there was more information, i.e. how old is the child, what was the TSH and T4, is this a total T3 (liothyronine) or free? Generally a high T3 (liothyronine) points to thyroid disease but it can also be affected by pregnancy, liver disease, and abnormally high levels of protein in the blood. Best discussed with the doc that ordered the test. ...Read more

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My T3 (liothyronine) level is high what should I do?

See Your Endo MD: Just having high T3 (liothyronine) does not give a good picture what is wrong. Need to get a complete picture of what is going on? ...Read more

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What are the symptoms of low t3 (liothyronine) levels?

Maybe none: T3 (liothyronine) & T4 are the active thyroid hormones. But low T3 (liothyronine) by itself may be normal, unless either T4 is low or TSH is elevated, then total thyroid production is likely low. See your doctor for full evaluation and treatment. ...Read more

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What test would I have to have for a reverse T3 (liothyronine) problem?

RT3: The test is called reverse T3 (liothyronine), (liothyronine) and is done in combination with a free T3 (liothyronine). More information here with cited research studies included: DrFairchild.org/endo/thyroid.htm ...Read more

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Is there a natural way to lower T3 (liothyronine) levels without medication?

Is there a natural way to lower T3 (liothyronine) levels without medication?

Reason for high T3 (liothyronine)?: If you have hyperthyroidism from grave's disease there really isn't a natural way to bring thyroid hormone levels down. If you want to avoid medication, that will be difficult because it isn't safe to be hyperthyroid. Even if you had your thyroid surgically removed or ablated by radioactive iodine you would still need to take medicine to replace your thyroid hormone under those circumstances. ...Read more

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I just got back my results and have an incredible high t3, (liothyronine) what does this mean?

I just got back my results and have an incredible high t3, (liothyronine) what does this mean?

Hyperthyroidism ?: High T3 (liothyronine) means hyperthyroidism or thyrotoxicosis depending on severity. You should seek an endocrinologist to decipher etiology of such elevation and if you need thyroid scan to come with an accurate diagnosis. If you are a female and in pubertal/post pubertal range, the odds are in favor of graves' disease being the mostly likely cause. Females: pregnancy test recommended. ...Read more

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Reverse t3 (liothyronine). How would i find out if i had it. Is there a certain test that has to be carried out?

RT3: The test is called reverse T3, (liothyronine) and Quest and LabCorp can easily do it. More info here: DrFairchild.org/endo/thyroid.htm ...Read more

Dr. David Geffner
457 doctors shared insights

T3 (Definition)

T3 is a thyroid ...Read more