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Dr. Andrew Rynne
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Dr. Andrew Rynne

Family Physician

Exp 50 years

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How Long Will It Take For Tsh Levels To Normalize After Discontinuing The Phentermine?

I have Hashimoto s and take Armour thyroid daily. For the last 6 months I have also been taking Phentermine. Over the past 6 months, my tsh lab results were affected by the phentermine. I have now stopped taking the Phentermine. How long will it take for my tsh levels to normalize after discontinuing the Phentermine? I just want to get my labs done but do not want a false low tsh result.
Mon, 12 Dec 2016
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Endocrinologist,  's  Response
Hello,
Thank you for asking on HCM!
TSH is a hormone that takes weeks to get back to normal ranges when the cause of instability is removed.
So you need to check TSH level 4-6 weeks after stopping phentermine.
Than adjust the dose of levothyroxine according to the result.
For a personalised comprehensive evaluation, treatment recommendations, or individual therapy, ask me at HealthCareMagic at this private link:
HCM Dr. Guni

Kind regards,
Dr.Mirjeta
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How Long Will It Take For Tsh Levels To Normalize After Discontinuing The Phentermine?

Hello, Thank you for asking on HCM! TSH is a hormone that takes weeks to get back to normal ranges when the cause of instability is removed. So you need to check TSH level 4-6 weeks after stopping phentermine. Than adjust the dose of levothyroxine according to the result. For a personalised comprehensive evaluation, treatment recommendations, or individual therapy, ask me at HealthCareMagic at this private link: HCM Dr. Guni Kind regards, Dr.Mirjeta