Thyroid (By mouth)

Introduction:

Thyroid (THYE-roid)

Treats hypothyroidism (the body does not produce enough thyroid hormone).

Brand Name(s):

Armour Thyroid, Westhroid, Nature-Throid NT-1, Nature-Throid NT-3, Nature-Throid, Nature-Throid NT-1/2, Nature-Throid NT-2

There may be other brand names for this medicine.

When This Medicine Should Not Be Used:

You should not use this medicine if you have had an allergic reaction to any type of thyroid hormone.

How to Use This Medicine:

Tablet, Capsule

  • Your doctor will tell you how much to take and how often
  • Take your medicine at the same time every day.
  • Take the medicine on an empty stomach.

If a dose is missed:

  • Take your medicine as soon as you remember that you missed a dose.
  • Skip the missed dose if it is almost time for your next dose.
  • You should not use two doses at the same time.

How to Store and Dispose of This Medicine:

  • Store at room temperature, away from heat and moisture.
  • Keep all medicine out of the reach of children.

Drugs and Foods to Avoid:

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

  • If you are taking cholestyramine (Questran®), take it either 4 hours before or 4 hours after you take levothyroxine.

Warnings While Using This Medicine:

  • Talk with your doctor before taking this medicine if you have heart disease, high blood pressure, or diabetes.
  • Do not stop taking this medicine without first checking with your doctor.

Possible Side Effects While Using This Medicine:

Call your doctor right away if you notice any of these side effects:

  • Skin rash or hives with intense itching
  • Shortness of breath or trouble breathing
  • Chest pain
  • Severe irritability or nervousness, tremors
  • Fast or irregular heartbeat
  • Severe diarrhea or intense sweating

If you notice these less serious side effects, talk with your doctor:

  • Anxiety
  • Headache
  • Trouble sleeping
  • Appetite changes, weight loss
  • Irregular menstrual periods
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