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TSH value 4.466 µIU/m to 0.150 µIU/m
TSH value went from 4.466 µIU/m to 0.150 µIU/m in 2 months time without taking any kind of medications for Thyroid. Have been recently recovering from Viral Throat Infection. The first value came in a test in October end and today got the lower value. What can cause this huge difference? Can viral infections cause this? Can taking Antibiotics affect the TSH value this drastically?
Answers (11)
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We call this ‘Sick Euthyroid’.
Recheck TSH in 6 weeks time.
All the best.
J G S R clinic
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It's due to.inflammation probably.
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If you want to discuss your problem in more detail, feel free to message me on WhatsApp at nine one one nine two five five six nine nine for a free detailed discussion*
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Transient fall in TSH can occur due to infection, inflammation.
Repeat test after 3 months.
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Can help you, kindly consult and provide detailed history for proper diagnosis and further management
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Yes it's possible.
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Yes, this kind of TSH fluctuation can happen and does not always mean permanent thyroid disease.
• A recent viral infection can cause subacute (viral) thyroiditis, where the thyroid temporarily releases stored hormones → this suppresses TSH (low TSH like 0.150).
• This condition often follows viral throat/URI infections and can evolve over weeks.
• Antibiotics themselves do NOT directly lower TSH. The timing is likely coincidental; the infection/inflammation is the real trigger.
• Lab variability, illness-related stress, and recovery phase can also affect TSH levels.
• The earlier TSH of 4.46 could represent transient subclinical hypothyroidism or early thyroiditis phase.
Next Steps
1. Repeat TSH + Free T4 + Free T3 after 4–6 weeks (when fully recovered).
2. If TSH remains low → check ESR/CRP and thyroid antibodies (TPO, TRAb).
3. Monitor symptoms: palpitations, weight loss, tremors, heat intolerance.
4. No thyroid medication unless symptoms are significant or labs stay abnormal.
Health Tips
• Avoid testing thyroid function during or immediately after infections.
• Do not start or stop thyroid medicines based on a single report.
• Most cases of viral thyroiditis are self-limiting and normalize in a few months.
Bottom line:
This change is most likely infection-related and temporary, not caused by antibiotics.
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Pls recheck with another lab. Give fasting sample. Kindly consult with me on 94 two six eight six 78 nine six.
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Dr. Ashita Kuruvilla
General Practitioner
8 yrs exp
Kolkata
Need few more details for further evaluation. Kindly consult
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Dr. Vetsa Sri Krishna Chaitanya
General Physician
7 yrs exp
Rajahmundry
Need a few more details please consult for further evaluation and treatment
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