Warnings & Precautions

A Look at the Shortage

Talk to your Health Care Professional

Interactions with other medication

Safety Information


A Look at the Shortage

Your doctor may prescribe Armour Thyroid if you have had problems with a synthetic therapy or, if you or your doctor prefers natural products. If you or your patients are having difficulty getting Armour thyroid prescriptions filled at a retail pharmacy in the United States due to manufacture backorder, we may be able to help. There are numerous rumors about Armour Thyroid that are simply not true. The natural thyroid drug known as Armour Thyroid is not off the market and production has not been shut down. There is a short term shortage in the United States of the three dosages of Armour. Manufacturers of natural thyroid drugs, including Forest Pharmaceuticals and RLC Labs confirmed the shortage being a result of the inability to obtain the active ingredient and desiccated porcine thyroid glands. Many health professionals are not even fully aware of the details surrounding the shortage. Some patients have been switched to synthetic based thyroid products even though they have been well controlled on the Armour Thyroid product. Did you know you can get you US prescription filled by mail-order pharmacies in Canada? Some US Armour Thyroid users have started to fill their prescriptions for the natural thyroid drug known as Thyroid in Canada.


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Talk to your Health Care Professional

Although Armour Thyroid is a natural product, it may not be suitable for your use. Prior to using Armour Thyroid, talk to your health care professional to ensure this is the correct medication for you. You should consult your health care professional prior to use for the following:


  • If you have a history of allergy or intolerance to any medications or other substances
  • If you have a history of high blood pressure
  • If you have a personal or family history of blood clots, or a personal history of heart disease or stroke
  • If you have been diagnosed with diabetes
  • If you have adrenal insufficiency
  • If you are pregnant or may be pregnant

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Interactions with other medication

Advise your health care professional about any other medications you are taking, including prescription medications, over-the-counter medications, vitamins or herbal products.


The usual dosage of thyroid hormones is determined by the indication and must in every case be individualized according to your response and laboratory findings. The effects of daily thyroid reach a therapeutic maximum usually in 4 to 6 weeks.


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Safety Information

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. Thyroid hormones, either alone or combined with other medications, should NOT be used for the treatment of obesity. An abnormal increase in thyroid hormone can result in hyperthyroidism. Increased heart rate, heart palpitations, and hair loss are just a few of the potential effects of hyperthyroidism.


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.


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