Common "T3 And T4 Levels" queries answered by top doctors | iCliniq

T3 And T4 Levels

T3 (Triiodothyronine) and T4 (Thyroxine) are hormones produced by the thyroid gland. The average level of T3 is 80 to 180 ng/dL, and T4 is 4 to 12 ug/dL. Increase or decrease in this levels causes metabolic disorders like hypothyroidism and hyperthyroidism.

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Why are my T3 and T4 levels high if not pregnant?

Query: Hello doctor,I recently had my thyroid test done. I am attaching the reports of the same. The note reads that a physiological rise in total T3 and T4 levels are seen in pregnancy and patients on steroids. Does it mean that I am pregnant? I am worried, as I am unmarried and have never had sex before.  Read Full »


Dr. Sagar Ramesh Makode

Answer: Hello, Welcome to icliniq.com. I have seen your reports (attachment removed to protect patient identity). Your thyroid profile is entirely normal and it is not at all suggestive of pregnancy, so stop worrying about it. This amount of variation is acceptable. The note you read, just says that if som...  Read Full »

I have low TSH levels. Will taking Propylthiouracil help?

Query: Hello doctor,Seven years back, I had done my thyroid profile. My TSH (thyroid-stimulating hormone) levels were low at 0.005 mU/L, free T3 (tri-iodothyronine) 4.45 pg/mL, and free T4 (thyroxine) 1.83 ng/dL. I have no symptoms of any hyperthyroidism, and I feel fine. I did my thyroid scan with a 99m T...  Read Full »


Dr. Shaikh Sadaf

Answer: Hello, Welcome to icliniq.com. I have read the query, and I can understand your concern. You have sub-clinical hyperthyroidism since neither your T3 nor T4 levels are increased. You said you do not having any hyperthyroidism symptoms, like a rapid heartbeat, weight loss, irregular periods, etc. ...  Read Full »

My TSH value is high whereas my T3 and T4 values are normal. What could be the reason?

Query: Hello doctor, I am a 44-year-old male with 5ft 4" in height and 152 lbs weight. My TSH (9.83) value is high, but T3 total (104.6) and T4 total (8.5) are normal. No medications are other than Uprise-D3 60 K capsule, which I take weekly. I have no particular symptoms but no weight loss in spite of ver...  Read Full »


Dr. Kaushal Bhavsar

Answer: Hello, Welcome to icliniq.com. I can understand your concern. I have gone through the reports you have attached. In my opinion, you should get done repeat test after a month.No need to start thyroid medicines. Do regular aerobic exercise like running, cycling, swimming, or walking. I hope I have s...  Read Full »

What is the treatment for my high T3 and T4 levels?

Query: Hello doctor, According to the lab report which was taken a week before TSH level is normal but T3 and T4 level is mildly increased. Please suggest will I be cured with medicine or without medicine. Currently, I am under medication for a chocolate cyst (Dienogest 2 mg).  Read Full »


Dr. Shaikh Sadaf

Answer: Hello, Welcome to icliniq.com. I have just read your query, and from what you have mentioned, it appears that you have a normal thyroid function test results. The slightly high T3 and T4 are not a thing to worry because they can be caused by other hormonal medicine that you are taking for your cho...  Read Full »

Can increased TSH levels harm the baby's brain growth?

Query: Hi doctor, I am 26 years old. My height is 5 feet inch and weight is 115.5 lbs. I am 20 weeks pregnant now. I underwent a surgery for complete thyroidectomy and I am taking Thyroxin 100 mcg regularly. In my first trimester, the TSH level was 0.31 and the doctor advised me to continue the same dosa...  Read Full »


Dr. Swaraj Waddankeri

Answer: Hi, Welcome to icliniq.com TSH (thyroid stimulating hormone) is very important for the baby's brain growth as rightly said by you. Therefore, it is imperative that we treat aggressively. Target TSH in the first trimester is 0.3 - 2.5 mIU/L and therefore the doctor did not change the treatment. I ho...  Read Full »

I have thyroid nodules. Should I undergo surgery?

Query: Hello doctor, I am a 41 year old male. My weight is 196 lbs and height is 6 feet. I have nodules in the thyroid gland since last two years. Initially, it started as a feeling of imbalance in the head about two years back. The initial assumption was vertigo and later it was found to be a small nodul...  Read Full »


Dr. Divakara. P

Answer: Hi, Welcome to icliniq.com. Basically, your scan reports (attachment removed to protect patient identity) are showing that you have thyroiditis (inflammation of the thyroid gland) along with a nodule in the thyroid gland. Because of this problem you are having the symptoms. Initially,you had hyperth...  Read Full »

Can dull headaches be related to my thyroid problem?

Query: Hi doctor, I have been diagnosed with Hashimoto's five months ago. My anti-TPO and anti-TG were 115 and 33 respectively. My TSH was 1.5 and FT4 1.1, so normal function. Two months ago, I started having palpitations and tested my thyroid again. TSH was 0.0018 (suppressed), FT4 2.66 and FT3 7.8. I was...  Read Full »


Dr. Swaraj Waddankeri

Answer: Hi, Welcome to icliniq.com. You have written a very detailed and engrossing history. Well done! The diagnosis of Graves' is usually made with a technetium scan of thyroid which I am not sure it was done or not. Regarding your dull ache of the head, is it present throughout the day or just morning...  Read Full »

My wife's TSH levels are reduced. Can the dosage be changed?

Query: Hi doctor, My wife is 2.5 months pregnant. She is 29 years old, weighs 101.8 lbs and is 4.10 feet tall. She has subclinical hypothyroidism, and her TSH is 12.7. She takes Thyronorm 75 mcg. Recently, we tested her TSH, which was 10.5 and total thyroxine (T4) is 12.4 (reference value is 4.5 to 12). Do...  Read Full »


Dr. Dattaprasad Balasaheb Inamdar

Answer: Hi,Welcome to icliniq.com.What dose was she taking Thyronorm (Levothyroxine) before? When was the dosage altered last? If the dosage was not reduced recently, that is, in the last 2 to 3 months, then the dose can be reduced to 62.5 mcg daily. Repeat testing would be needed after 4 to 8 weeks of chan...  Read Full »

My wife bleeds too much during menstruation. Why?

Query: Hello doctor, My wife is suffering from a menstrual cycle problem. She is bleeding too much, and her period continues for 7 days. Due to this, low BP, headache, and the lower back problem has started. For the last two years, she has been feeling weak and less energetic. Kindly suggest good medicine...  Read Full »


Dr. Anindya Das

Answer: Hi, Welcome to icliniq.com. From the details given in your query, it seems that your wife is suffering from abnormal uterine bleeding (AUB). There are several reasons for AUB. For diagnosis, you better do one ultrasonography of the abdomen and serum for a thyroid function test. Meanwhile, I sugges...  Read Full »

What is the function of T3 hormone?

Query: Hello doctor, I am a female whose thyroid stimulating hormones and T4 are normal but T3 is high. Please tell me the function of this hormone and if this hormone affects our reproduction. Please help. Thank you.   Read Full »


Dr. Shaikh Sadaf

Answer: Hello, Welcome to icliniq.com. I can understand your concern. From the reports you have attached (an image hidden to protect the identity of the patient), it does not seem like you have any thyroid problems. The TSH (thyroid stimulating hormone) is the main factor which is normal and T3 is the vari...  Read Full »

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