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THYROID hormone (THI roid) treats low thyroid levels (hypothyroidism) in your body. It works by replacing a thyroid hormone normally made by the body. Thyroid hormones play an important role in your overall health. They help support metabolism and energy levels.
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Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy
This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.
COMMON BRAND NAME(S): Armour Thyroid, Bio-Throid, Nature Throid NT, Nature Thyroid, Nature-Throid, NatureThyroid NT, NP Thyroid, Westhroid, Westhroid TH-1, Westhroid TH-1.5, Westhroid TH-1/2, Westhroid TH-1/4, Westhroid TH-2, Westhroid TH-2.5, Westhroid TH-3, Westhroid TH-3/4, Westhroid TH-4, Westhroid TH-5, Westhroid-P, WP Thyroid
They need to know if you have any of these conditions:
Take this medication by mouth with water. Take it as directed on the prescription label at the same time every day. It is best to take on an empty stomach, at least 30 minutes to one hour before breakfast. Keep taking it unless your health care provider tells you to stop.
Talk to your care team about the use of this medication in children. While this medication may be prescribed for children for selected conditions, precautions do apply.
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Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.
NOTE: This medicine is only for you. Do not share this medicine with others.
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.
This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.
Do not switch brands of this medication unless your care team agrees with the change. Ask questions if you are uncertain.
You will need regular exams and occasional blood tests to check the response to treatment. If you are receiving this medication for an underactive thyroid, it may be several weeks before you notice an improvement. Check with your care team if your symptoms do not improve.
It may be necessary for you to take this medication for the rest of your life. Do not stop using this medication unless your care team advises you to.
This medication can affect blood sugar levels. If you have diabetes, check your blood sugar as directed.
Some brands of this medication may have a strong odor. This does not mean that the medication is spoiled.
You may lose some of your hair when you first start treatment. With time, this usually corrects itself.
If you are going to have surgery, tell your care team that you are taking this medication.
Side effects that you should report to your care team as soon as possible:
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Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Keep out of the reach of children and pets.
Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Protect from light and moisture. Keep container tightly closed. Throw away any unused medication after the expiration date.
NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.
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Note: Introduction and Additional Common Questions written and medically approved by Cleveland Clinic professionals.