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Doctor insights on: Is Levothyroxine T3 Or T4

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I have hypothyroidism but im tired all the time and im cold alot what can I do I have normal blood levels and take levothyroxine for it T3 (liothyronine) T4 TSH ok?

I have hypothyroidism but im tired all the time and im cold alot what can I do I have normal blood levels and take levothyroxine for it T3 (liothyronine) T4 TSH ok?

Tired and cold: It is most likely you have not been given enough thyroid medication.
If you are sure that your thyroid blood levels are OK - (how long since they were last measured?) - please see your doctor to work out why you are tired and cold.

Thyroid labs should be measured every 3-6 months. ...Read more

Dr. Jesse Krakauer
460 Doctors shared insights

Liothyronine (Definition)

Liothyronine is a thyroid agent. ...Read more


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I've been on levothyroxine for three weeks and almost feel like my symptoms are worse. Both my t4 and my t3 (liothyronine) are low, the most bothersome symptoms ach?

I've been on levothyroxine for three weeks and almost feel like my symptoms are worse. Both my t4 and my t3 (liothyronine) are low, the most bothersome symptoms ach?

Dosage adjustment: Usually, most cases of hypothyroidism are treated with increasing doses of l-thyroxin until all levels of T3 (liothyronine). T4 and TSH are normalized. This is determined by routine blood testing including checking for anti- thyroid antibodies to rule out autoimmune (Hashimoto's) thyroiditis. ...Read more

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TSH= 0.741 uIU/ml T3=1.33 ng/ml T4= 7.61ug/dl taking levothyroxine?

TSH= 0.741 uIU/ml T3=1.33 ng/ml T4= 7.61ug/dl taking levothyroxine?

What is the question: Hi. Your thyroid function is normal on your dose of l-thyroxine (assuming you're equilibrated on your dose). What did you want to ask about? Good luck! ...Read more

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I (27 years old) have a tsh=4.87, t3=1.2, t4=6.9, I wanted to know whether I should take levothyroxine or not, and if yes how much a day?

I (27 years old) have a tsh=4.87, t3=1.2, t4=6.9, I wanted to know whether I should take levothyroxine or not, and if yes how much a day?

Mild hypothyroidism: Your TSH is very mildly elevated, other thyroid levels are normal. Treatment depends on symptoms. If you have gained weight, excessive fatigue, constipation, etc., treatment with thyroid hormone (25 to 50 mcg daily) may help. If you have no symptoms, it is worth waiting, and repeating the level in a few months to see if it is better or worse. ...Read more

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On levothyroxine 1 l25, T4. 45 and T3 (liothyronine) 2.3 no symptoms. Do I need to get the doctor to increase the T3 (liothyronine) level?

Check TSH: The most useful test to follow thyroid replacement is a TSH. If your hormone replacement is not adequate your TSH will be elevated. The TSH responds to both the T3 (liothyronine) and T4 levels ...Read more

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So a TSH of 5.5 with T3 (liothyronine) of 2.8 & T4 of 0.98 (was told T3 (liothyronine) & T4 r ok) is it right to take 50mcg of levothyroxine? I also take asgwaghanda for hotflash

So a TSH of 5.5 with T3 (liothyronine) of 2.8 & T4 of 0.98 (was told T3 (liothyronine) & T4 r ok) is it right to take 50mcg of levothyroxine? I also take asgwaghanda for hotflash

Yes: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your TSH value suggests thyroid deficiency and it would reasonable to take levothyroxine. ...Read more

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If you have a normal TSH and T4 levels but your T3 (liothyronine) is low do you need to increase levothyroxine?

If you have a normal TSH and T4 levels but your T3 (liothyronine) is low do you need to increase levothyroxine?

Depends: The T3 (liothyronine) may be low before you take your medication and isn't necessarily abnormal. If you still have symptoms and the TSH is not in the low part of the normal range then adding more levothyroxine is probably the right thing to do. Some people do not convert enough of the T4 to T3 (liothyronine) and they need to take some T3 (liothyronine) in addition to T4 or take a natural thyroid med like Armour Thyroid or nature-throid. ...Read more

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I'm taking 200mg of levothyroxine, my tsh is 0.1 and t3 (liothyronine) and t4 are normal. It's subclinical hiperthyrodism?

I'm taking 200mg of levothyroxine, my tsh is 0.1 and t3 (liothyronine) and t4 are normal. It's subclinical hiperthyrodism?

May be: Your TSH is a little on the low side. What is your free T4 level? If that is normal there is no urgency but you should talk to your doctor about adjusting your dose. ...Read more

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Was told to stop taking levothyroxine for 6 weeks, now blood work reads t3/2.8 t4/0.98 and tsh/5.5. Today I got call to start right away 50mcg again.

Your TSH is high: Hi Myrna,
Your TSH, thyroid stimulating hormone, is high, which means that you have an under active thyroid gland. TSH levels are the most sensitive in diagnosing low thyroid. TSH is produced in a gland in the brain called the pituitary and its level increases in response to low thyroid hormone levels in the bloodstream.
I hope this answers your question. ...Read more

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Can levothyroxine 50 mg shrink multiple nodules? It brought TSH down to 0.7 uUI/ml, T3 (liothyronine) to 3.57 pmol/L, but T4=20, 3 pmol/L which is normal high range.

Can levothyroxine 50 mg shrink multiple nodules? It brought TSH down to 0.7 uUI/ml, T3 (liothyronine) to 3.57 pmol/L, but T4=20, 3 pmol/L which is normal high range.

Thyroid nodules: Yes, thyroid medication may shrink nodules. The dose you mentioned is probably 50 micrograms (mcg). If any of the nodules increase in size it will require a fine needle aspiration. Monitor closely. ...Read more

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My TSH is 0.741 uIU/ml, My T3 (liothyronine) is 1.33 ng/ml, My T4 is7.61 ug/dl. My doc prescribed me Levothyroxine 100mcg?

My TSH is 0.741 uIU/ml, My T3 (liothyronine) is 1.33 ng/ml, My T4 is7.61 ug/dl. My doc prescribed me Levothyroxine 100mcg?

TSH: Each clinical laboratory has a different reference range for thyroid (and other) labs so you need to find out if the labs are normal, or above or below the range.

In my clinic your data would not warrant Levothyroxine but you need more confirmation from your doctor.

Too much of a good thing is not good for you. ...Read more

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Total thyroidectomy 4 mo ago. High TSH & t4, low t3 (liothyronine). Feeling very hypo. Increases in levothyroxine not helping symptoms. Sliding downhill fast! Help!

Thyroid: Something does not sound right.
A high TSH with a high T4 is very uncommon.
It is possible, but unlikely that your pituitary gland is producing too much TSH.
You need to see your thyroid surgeon or your regular doctor as soon as possible. ...Read more

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Hi, t3 (liothyronine) uptake: 32, t4 free 1.35, t4 11.8, FTI 3.8, TSH 2.050, im taking. 50 mcg levothyroxine. How's my thyroid, gain 40 pounds last few years?

Hi, t3 (liothyronine) uptake: 32, t4 free 1.35, t4 11.8, FTI 3.8, TSH 2.050, im taking. 50 mcg levothyroxine. How's my thyroid, gain 40 pounds last few years?

Not your thyroid: I can't say if you needed to be started on T4 without seeing your test results before treatment but your current tests show normal thyroid levels on your current dose. It is rare for an underactive thyroid to case weight gain and when it does, the thyroid is severely underactive and weight gain is no more than 5-10 lb. So your 40 lb weight gain is likely due to lifestyle not hormonal issues ...Read more

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I'm on Levothyroxine and Cytomel (liothyronine) for T3 and T4 and my blood work came back TSH w/Reflex to FT4 is 0.01 L and T4, FREE is 0.6 L. What does this mean?

I'm on Levothyroxine and Cytomel (liothyronine) for T3 and T4 and my blood work came back TSH w/Reflex to FT4 is 0.01 L and T4, FREE is 0.6 L. What does this mean?

Several things: Hi. Without seeing your thyroid function over time, I'd say the fact that you have a goiter & 2 cm nodule (same thing, or different?) AND taking T4 AND T3 (liothyronine), (liothyronine) you may be over-treated with T3 (liothyronine) so that your TSH is suppressed and that causes low free T4, which is not made up for by the levothyroxine you're taking. I suggest you talk with your doctor, who won't have to guess like we do! Good luck! ...Read more

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My doctor says my T3 (liothyronine) and T4 levels are okay but the TSH levels are still off, what are the causes? I am taking. 088 levothyroxine daily (from. 150 to. 112 to current dose) 10 + years ago had a radio-active iodine procedure.

My doctor says my T3 (liothyronine) and T4 levels are okay but the TSH levels are still off, what are the causes? I am taking. 088 levothyroxine daily (from. 150 to. 112 to current dose) 10 + years ago had a radio-active iodine procedure.

This: This means you need an adjustment in your dose of levothyroxine. If your TSH is up still, you need an increase your T4 dose. Your pituitary gland that makes the TSH is not getting enough T4 and T3 (liothyronine) to be happy even if those are in the "normal" range. ...Read more

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I, m pregnant in the 15 week. I use levothyroxine. In week 13 my thyroid test was T3=170.7 T4=15.14 TSH=0.96 To What extent is different with normal?

I, m pregnant in the 15 week. I use levothyroxine. In week 13 my thyroid test was T3=170.7 T4=15.14 TSH=0.96 To What extent is different with normal?

Normal: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your test results are normal. T4 is normally higher in pregnancy. See this site for more info.

http://www. Endocrineweb. Com/conditions/thyroid/thyroid-function-tests ...Read more

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Hello I am 52y/o I have hashimoto thyroiditis I take 100mcg levothyroxine for 4 days and 50mcg for 3days of week. Tsh=0.1 T3 (liothyronine) =110 t4=10 is that ok?

Hello I am 52y/o I have hashimoto thyroiditis I take 100mcg levothyroxine for 4 days and 50mcg for 3days of week. Tsh=0.1 T3 (liothyronine) =110 t4=10 is that ok?

Recommendation: Not knowing how you feel or your current symptoms, from the labs above, you are mildly hyperthyroid. Currently you are taking approximately 78 mcg/day of levothyroxine (550 mcg/7 days). A reasonable change would be to just take 75 mcg/day. This way, you don't have to take two different doses or cut the pills. This is again based solely on labs. Your doc who knows you best should evaluate you. ...Read more

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T3 (liothyronine) 0.98, T4 8.79, TSH 1.24 told normal although endocrinologist said have nodules and thyroid looks stressed, prescribed low dose levothyroxine. Why?

Ask the doctor: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your lab test are normal and you should ask the doctor who prescribed the medication. ...Read more

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My TSH is point 4 (.4) free T3 (liothyronine) is 2.3 free T4 is 1.0 reverse T3 (liothyronine) is 286. I take 200mcg levothyroxine. No enerdgy, hair falling out, weight gain?

Wrong medication?: Levothyroxine may not be the correct medication for you, hence more of the same will not help. You probably could use a few more tests. More info on: DrFairchild. Org/endo/thyroid. Htm ...Read more

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My TSH is point 4 (.4) free T3 (liothyronine) is 2.3 free T4 is 1.0 reverse T3 (liothyronine) is 286. I take 200mcg levothyroxine. No enerdgy, hair falling out, weight gain?

My TSH is point 4 (.4) free T3 (liothyronine) is 2.3 free T4 is 1.0 reverse T3 (liothyronine) is 286. I take 200mcg levothyroxine. No enerdgy, hair falling out, weight gain?

Reverse T3 (liothyronine): Normally yourt4 is deioidonated in your liver to T3 (liothyronine) to produce the active thyroid hormone. However the presence of high cortisol, high estrogen or high Insulin impairs this process. Instead of making t3 (liothyronine), (liothyronine) your liver makes reverse t3 (liothyronine). The TSH and ft4 are nl b/c the thyroid itself works fine, it is the liver that is not ok. Pure T4 makes this worse, you need some T3 (liothyronine) supplentation. ...Read more

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Isn't the effect of thyroid hormones at pituitary level altered in patients without a thyroid under levothyroxine monotherapy? Therefore, TSH cannot always be considered an appropriate marker? Isn't free T4 & T3 a more approriate marker in levothyroxine-

Isn't the effect of thyroid hormones at pituitary level altered in patients without a thyroid under levothyroxine monotherapy? Therefore, TSH cannot always be considered an appropriate marker? Isn't free T4 & T3 a more approriate marker in levothyroxine-

No: If your body is not handling the levothyroxine well, your TSH level will be off and you will need to increase the dose. As long as your TSH is "normal", then it is accepting the levothyroxine as a hormone and is a good measuring parameter. Ft4 and ft3 varies throughout the day (especially if you are taking levothyroxine), thus they are not good tests to base your treatment on. ...Read more

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I'm on 75 mcg of levothyroxine T4 can I take 75 mcg of triiodothyronine t4?

Depends: Depends on what your body is doing to the T4 and how you are feeling. If you still have symptoms of hypothyroidism, it may be worth looking into. More info on http://drfairchild. Blogspot. Com/2012/12/proper-thyroid-testing. Html ...Read more

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How do you know if on Synthroid (thyroxine) that you are converting T4 to t3?

How do you know if on Synthroid (thyroxine) that you are converting T4 to t3?

Same as T4: Snthetic thyroid hormone is same as T4, metabolism same as natural t 4, normal t 4 8% of it converted to T3, by taking away one iodine atom, (deidenisation) same will be with synthroid, (thyroxine) speak to your oxtor. ...Read more

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Apparently I am not converting Synthroid (thyroxine) T4 into enough t3. Why? How do I change this?

Apparently I am not converting Synthroid (thyroxine) T4 into enough t3. Why? How do I change this?

Desiccated thyroid: Dessicated thyroid such as Armour Thyroid may be the better med choice for you. Check free T3 and reverse t3. Ft3 should be in upper range and rt3 in lower range. If your ratio is off, you may need Armour Thyroid or t3, and synthroid (thyroxine) would be the wrong med for you. ...Read more

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TSH= 0.006 uIU/ml. T3= 1.75nmol/l T4= 15.3 ug/dl I'm on 200mcg of L thyroxine I need your advice please?

TSH= 0.006 uIU/ml. T3= 1.75nmol/l T4= 15.3 ug/dl I'm on 200mcg of L thyroxine I need your advice please?

Too much med: Your thyroid levels are too high on this dosage of levothyroxine. You need a lower dose. I usually have patients go down in steps (i.e. 175 mcg, recheck level in 2 months, then decrease to 150 mcg if still high, etc) ...Read more

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What's a better hypothyroid medicine. Cytomel (liothyronine) or levothyroxin? I am on levothyroxin but heard it only raises t4 and not t3

What's a better hypothyroid medicine. Cytomel (liothyronine) or levothyroxin? I am on levothyroxin but heard it only raises t4 and not t3

Hypothyroid: Relax! Just make sure that you are taking the correct dose of Levothyroxin. As you begin thyroid medicine, you should have your doctor check your T4 every month or so until you and the doctor are convinced that your levels are OK. Won't take long to decide. ...Read more

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My wife's free t3&t4 in normal range but her ths is low, it's 0.04. She've been taking thyroxine sodium 175mg for the past 6 months any recomandation?

My wife's free t3&t4 in normal range but her ths is low, it's 0.04. She've been taking thyroxine sodium 175mg for the past 6 months any recomandation?

TSH: She may be subclinical hyperthyroid. Does she have symptoms of hyperthyroidism? Anxiety, increased heart rate, insomnia? Make sure she gets her thyroid panel checked again. Depending on the results and her symptoms, her physician make readjust the strength down. It takes time to get individuals level. ...Read more

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My daughter T3 (liothyronine) &T4 was done on 4 day after birth. T3 (liothyronine) was normal but T4 (thyroxine) is 20.5. Is it normal or need to worry?

T3 (liothyronine) T4: Yes you need to worry because the doctor did not explain to you what this means.
It is unlikely to be an issue but your doctor must explain this to you so you can relax and enjoy your baby.

The word "doctor" is derived from "docere - to teach".

Your doctor is not doing her/his job! ...Read more

Dr. David Sneid
1,422 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more


Levothyroxine (Definition)

Of the hormone produced by one's own ...Read more