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Women's Health

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Hypothyroidism - Medications

Thyroid hormone medicine is the only effective way to treat hypothyroidism. In most cases, thyroid hormone medicine:

  • Reduces or eliminates symptoms of hypothyroidism. Symptoms usually improve within the first week after you begin therapy. All symptoms usually disappear within a few months.
  • May reduce the risk of slowed physical growth, intellectual disability, and behavioral problems in infants and children.

Thyroid hormone medicine does not cause side effects if you take the correct dose.

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What to think about

People who have hypothyroidism need treatment with thyroid hormone medicine. Depending on the cause of their hypothyroidism, they may need treatment for the rest of their lives.

Taking certain supplements, such as calcium or iron (or both), at the same time as thyroid hormone medicine may reduce the amount of thyroid hormone medicine absorbed by the body. Take calcium supplements at least 4 hours before or after taking thyroid hormone medicine. Also avoid taking iron supplements at the same time as thyroid medicine.

Talk to your doctor about whether you need to change your dose of thyroid medicine if you also take birth control pills or other hormones. You may need to take more thyroid hormone medicine than you would if you were not taking these hormones.

Follow-up visits with your doctor are important to make sure that you are taking the correct dose of medicine. Most people have blood tests 6 to 8 weeks after starting treatment. After thyroid hormone levels return to normal, thyroid function tests are typically rechecked once a year.

WebMD Medical Reference from Healthwise

Last Updated: November 14, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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