Armour® Thyroid Tablets

(Commercial Product)

Available Dosage Strengths

1/4 grain – 4 grain

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Disclaimer: Images are for reference only; actual products may vary.

Product Overview

Description

Armour® Thyroid Tablets Description^1,2

Armour Thyroid (thyroid tablets, USP for oral use is a desiccated thyroid extract that is derived from porcine thyroid glands. (T3 liothyronine is approximately four times as potent as T4 levothyroxine on a microgram for microgram basis.) It provides 38 mcg levothyroxine (T4) and 9 mcg liothyronine (T3) per grain of thyroid.¹ It is used for the treatment of hypothyroidism of any etiology, and for the treatment or prevention of various types of euthyroid goiter.

Mechanism of Action

Mechanism of Action^1,2

Thyroid hormones influence the growth and maturation of tissues, increase energy expenditure, and affect the turnover of essentially all substrates. These effects are mediated through control of DNA transcription and, ultimately, protein synthesis. Thyroid hormones play an integral role in both anabolic and catabolic processes and are particularly important to the development of the central nervous system in newborns. They regulate cell differentiation and proliferation, and aid in the myelination of nerves and the development of axonal and dendritic processes in the nervous system. Thyroid hormones, along with somatotropin, are responsible for regulating growth, particularly of bones and teeth.

Adverse Reactions

Signs and symptoms of overdosage^1,2

Anorexia, nausea, vomiting
Palpitations, tachycardia
Nervousness, tremors
Insomnia, irritability
Weight loss
Heat intolerance
Menstrual irregularities

Contraindications & Precautions

Contraindications & Precautions^1,2

Hypersensitivity to any component of the formulation.
Use with caution in patients with cardiovascular disease (e.g., angina, arrhythmias).
Caution in patients with diabetes mellitus as thyroid hormone can alter glycemic control.
Start at lower doses in elderly individuals and titrate slowly.
Long-term use may accelerate bone loss, especially in postmenopausal women.

Storage

Store at controlled room temperature (20°C to 25°C / 68°F to 77°F)
Protect from moisture and light
Keep in a tightly closed container

References

Armour Thyroid Prescribing Information. RxAbbVie. Revised March 2024. Accessed June 2, 2025. https://www.rxabbvie.com/pdf/armour_thyroid_pi.pdf
Clinical Pharmacology Armour thyroid clinical monograph 2025 https://www.clinicalkey.com/pharmacology/

Disclaimer

Wells Pharmacy Network distributes certain FDA-approved commercial products that are manufactured by third-party pharmaceutical companies. These products are not compounded or manufactured by Wells Pharmacy Network. Product availability at the time of dispensing may vary due to supply chain conditions.

This information is for educational purposes only. Compounded products have not been reviewed, approved, or evaluated by the FDA for safety and effectiveness. It is not intended to diagnose, treat, cure, or prevent any disease. No claims are made regarding treatment, cure, or prevention of any disease or condition.

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