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Commonly Used Brand Name(s)Armour Thyroid, Nature-Throid NT-1, Nature-Throid NT-1/2, Nature-Throid NT-2, Nature-Throid NT-3, Nature-Thyroid, Westhroid
Therapeutic ClassificationsThyroid Supplement
- Blackbox Warning
- Proper Use
- Missed Dose
- Use & Storage
- Before Using
- Breast Feeding
- Drug Interactions
- Other Interactions
- Other Medical Problems
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Thyroid is used to treat hypothyroidism, a condition where the thyroid gland does not produce enough thyroid hormone. It is also used to help decrease the size of enlarged thyroid glands (known as goiter) and to treat thyroid cancer .
Thyroid is also used in some medical tests to help diagnose problems with the thyroid gland .
This medicine is available only with your doctor's prescription .
This medicine usually needs to be taken for life. Do not stop taking this medicine or change your doses without first checking with your doctor. It may take several weeks before you start to notice an improvement in your symptoms .
The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.
The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.
- For oral dosage form (tablet):
- For the treatment of hypothyroidism:
- Adults—At first, 30 milligrams (mg) once a day. Then, your doctor may increase your dose a little at a time up to the usual maintenance dose of 60 to 120 mg a day. A lower starting dose of 15 mg/day may be given to patients for certain conditions.
- Children 0 to 6 months of age—The dose is based on body weight and must be determined by your doctor. The usual dose is 15 to 30 mg once a day.
- Children 6 to 12 months of age—The dose is based on body weight and must be determined by your doctor. The usual dose is 30 to 45 mg once a day.
- Children 1 to 5 years of age—The dose is based on body weight and must be determined by your doctor. The usual dose is 45 to 60 mg once a day.
- Children 6 to 12 years of age—The dose is based on body weight and must be determined by your doctor. The usual dose is 60 to 90 mg once a day.
- Children over 12 years of age—The dose is based on body weight and must be determined by your doctor. The usual dose is over 90 mg once a day .
- For the treatment of hypothyroidism:
If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.
Use & StorageTOP
Ask your healthcare professional how you should dispose of any medicine you do not use.
Keep out of the reach of children.
In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:
Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.
Appropriate studies performed to date have not demonstrated pediatrics-specific problems that would limit the usefulness of thyroid in children .
Appropriate studies performed to date have not demonstrated geriatrics-specific problems that would limit the usefulness of thyroid in the elderly. However, elderly patients are more likely to have age-related heart and blood vessel problems, which may require caution in patients receiving thyroid .
|All Trimesters||A||Adequate studies in pregnant women have not shown an increased risk of fetal abnormalities.|
There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.
Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.
Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.
Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.
Other Medical ProblemsTOP
The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:
- Adrenal insufficiency (untreated) or
- Thyrotoxicosis (overactive thyroid)—This medicine should NOT be used in patients with any of these conditions .
It is very important that your doctor check your progress at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. Blood and urine tests will be needed to check for unwanted effects .
Thyroid should not be used for the treatment of obesity or for the purpose of losing weight. This medicine is ineffective for weight reduction and when taken in larger amount, it may cause more serious medical conditions .
Call your doctor right away if you start to have chest pain, fast, irregular, pounding, or racing heartbeat or pulse, excessive sweating, heat intolerance, nervousness, or any other unusual medical condition .
For patients with diabetes, it is very important that you keep track of your blood or urine sugar levels as instructed by your doctor. Check with your doctor immediately if you notice any changes in your sugar levels .
A temporary loss of hair may occur during the first few months of thyroid therapy. Ask your doctor about this if you have any concerns .