thyroid tablets USP (ARMOUR THYROID)

Drug and Dietary Supplement Profiles

A comprehensive review of the safety and effectiveness of this drug. If the drug is not a Do Not Use product, information on adverse effects, drug interactions and how to use the medication are included.

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thyroid tablets USP (ARMOUR THYROID)
We list this drug as a Do Not Use drug because it is not adequately guaranteed to provide appropriate blood levels of thyroid hormone and reliable alternatives are available.

Disease and Drug Family Information

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Thyroid Hormone [hide all summaries]
Variations in the amount of active levothyroxine available in a tablet can affect both the safety and effectiveness of the drug. Levothyroxine is unstable in the presence of light, temperature, air, and humidity. Patients who receive superpotent tablets (too much levothyroxine) experience chest pain, rapid heart rate, or heart rhythm disturbances. There is also evidence that overtreatment can cause the bone-weakening disease osteoporosis. Subpotent (too little levothyroxine) tablets will not be effective in controlling the symptoms of low thyroid hormone production (hypothyroid).

Worst Pills, Best Pills Newsletter Articles

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Hypothyroidism: A Consumer’s Guide to Diagnosing and Treatment [hide all summaries]
(June 2009)
The article explains why it is not a good idea to start treatment with thyroid hormone replacement without confirmation with laboratory tests that you actually have hypothyroidism. It also discusses the kinds of symptoms that should lead you to have your thyroid level checked.

Do Not Use! Natural or Desiccated Thyroid (ARMOUR THYROID) For Thyroid Hormone Replacement Therapy [hide all summaries]
(May 2003)
We wrote in the first edition of Worst Pills, Best Pills, published in 1988, that natural or desiccated (dried) thyroid extract products, such as ARMOUR THYROID, should not be used except by those who have successfully taken it for years to control their symptoms of low thyroid hormone production (hypothyroidism).

Drug Recalls