Armour Thyroid

Generic name: Natural thyroid hormone.

Other brand names: S-P-T, Thyrar, Thyroid Strong.

Armour Thyroid is a thyroid hormone replacement Hormones stimulate and regulate body functions.  

Quick Facts About Armour Thyroid


Used to treat a thyroid gland incapable of producing enough hormone. Also used to treat or prever: goiter, and to diagnose an overactive thyroid in a suppression test.

Armour Thyroid Dosage

Take exactly as prescribed, and at the same time each day. Do not change brands without consulting your doctor.

  • Usual adult dose: no usual dose, dose depends cr how much thyroid hormone your body produces For an underactive thyroid gland — may need to take medication indefinitely.
  • Usual child dose: not generally prescribed for children.
  • Missed dose: take as soon as possible, unless almost time for next dose. In that case, do not take missed dose; go back to regular schedule. Do not double doses. Two or more missed doses in a row — call your doctor. Dose may be adjusted if you have diabetes or underactive adrenal glands.

Armour Thyroid Side Effects

Overdose symptoms:

speeding up of all of the body’s vital processes, causing physical and mental hyperactivity, increased appetite, excessive sweating, chest pain, increased pulse rate, palpitations, nervousness, intolerance to heat, tremors, rapid heartbeat. If you suspect an overdose, immediately seek medical attention.

Side effects are rare when Armour Thyroid is taken exactly as prescribed. Taking too much or increasing dose too quickly may result in overstimulation of the thyroid gland. Symptoms of overstimulation: changes in appetite, diarrhea, fever, headache, increased heart rate, irritability, nausea, nervousness, sleeplessness, sweating, weight loss.

No known less common or rare Armour Thyroid side effects.


Inform your doctor before combining Armour Thyroid with:

asthma medications such as Theo-Dur; blood thinners such as Coumadin; Cholestyramine (Questran); Colestipol (Colestid); Estrogen preparations, including birth control pills such as Ortho-Novum and Premarin; Insulin; oral diabetes medications such as Diabinese and Glucotrol.

No known food/other substance interactions. 

Special Cautions

If pregnant or planning to become pregnant inform your doctor. May use for thyroid deficiency during pregnancy with regular testing and medication adjustments by your doctor. May breastfeed while continuing treatment.

Seniors with angina (chest pain) should be prescribed a lower dose, and have regular checkups with your doctor.

Children may experience initial, temporary loss of hair when taking Armour Thyroid.

  • Not effective as a weight-loss medication and shoulc not be used for that purpose. May cause severe side effects, especially if combined with appetite suppressants.
  • Should not take if you have or had: allergic reactior to this mediation, an overactive thyroid gland, or your adrenal glands are not producing enough corticosteroid hormone.
  • Aggravates symptoms of diabetes.

Note: provides accurate and independent information prescription pills, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. If you have questions about  dosage, or Armour Thyroid side effects, please contact your healthcare provider.