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What do high levels of thyroid stimulating hormone mean?

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A normal TSH range is 0.4 to 5 milli-international units per liter (mIU/L). If your level is higher than this, chances are you have an underactive thyroid. Pregnancy can also make your TSH levels higher. If you're on medications like steroids, dopamine, or opioid painkillers (like morphine), you could also get a lower-than-normal reading.

SOURCES:

Mayo Clinic: "Hypothyroidism (underactive thyroid)."

American Thyroid Association: "Thyroid Function Tests."

Medscape: "Thyroid-Stimulating Hormone."

National Academy of Hypothyroidism: "How Accurate is TSH Testing?"

Reviewed by Nayana Ambardekar on March 24, 2019

SOURCES:

Mayo Clinic: "Hypothyroidism (underactive thyroid)."

American Thyroid Association: "Thyroid Function Tests."

Medscape: "Thyroid-Stimulating Hormone."

National Academy of Hypothyroidism: "How Accurate is TSH Testing?"

Reviewed by Nayana Ambardekar on March 24, 2019

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What do low levels of thyroid stimulating hormone mean?

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