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Source

Armour Thyroid is made from porcine thyroid glands. Only USDA inspected grain-fed pigs are used.

Side Effects

Since Armour Thyroid is made to replace thyroid hormones, the most common side effects generally mimic an underactive or overactive thyroid (hypothyroidism or hyperthyroidism, respectively). Adverse reactions other than those indicative of hyperthyroidism, either initially or during the maintenance phase, are rare.

If you experience chest pain, increased pulse rate, palpitations, excessive sweating, heat intolerance, or nervousness, please consult your doctor immediately; your dose may need to be adjusted.

Important Safety Information Thyroid hormone should be used with caution in patients with angina pectoris or the elderly, in whom there is a greater likelihood of occult cardiac disease. In these patients, therapy should be initiated with low doses, i.e., 15-30 mg Armour Thyroid. The development of chest pain or other exacerbation of cardiovascular symptoms will require a decrease in dosage. Thyroid hormone may increase symptoms of diabetes mellitus, diabetes insipidus, or cortical insufficiency. Appropriate adjustments of the various therapeutic measures directed at these concomitant endocrine diseases are required. Dosages of oral anticoagulants should be adjusted in thyroid-treated patients on the basis of frequent prothrombin time determinations. Caution should be used in infants where excessive doses of thyroid hormone preparations may produce craniosynostosis.