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Can Armour Thyroid make you tired?

Medically reviewed by Carmen Pope, BPharm. Last updated on Aug 29, 2023.

Official answer


Armour Thyroid is unlikely to make you tired or sleepy. Tiredness is a symptom of low thyroid levels (hypothyroidism) and if you still feel tired while taking Armour Thyroid then you should talk to your doctor because you may need the dosage of Armour Thyroid increased.

You should never increase the dosage of Armour Thyroid yourself, without being under medical supervision because too much Armour Thyroid is not safe.

Side effects of Armour Thyroid to watch for and contact your doctor about include:

  • Nausea
  • Vomiting
  • Headache
  • Diarrhea
  • Joint pain or muscle cramps
  • Fever
  • Increased heat sensitivity
  • Appetite changes
  • Menstrual cycle changes in women.

Taking too much Armour Thyroid can cause overdose symptoms that include:

  • A racing heart
  • Chest pain
  • Shortness of breath
  • Anxiety
  • Irritability
  • Tremors
  • Insomnia (sleeplessness)
  • Sweating.
  • Harrar S. What You Need to Know About Hypothyroidism Extract Medications 23 March 2021.
  • Victor Bernet & Ana-Maria Chindris (2012) The potential dangers of supplements and herbal products marketed for improved thyroid function, Expert Review of Endocrinology & Metabolism, 7:3, 247-249, DOI: 10.1586/eem.12.16
  • Armour Thyroid Updated 05/2021. Allergan, Inc.

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