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What Is Thyroid USP Used For?

Why Is Thyroid USP Used for Other Thyroid Problems?

The amount of thyroid hormones produced by the thyroid gland is controlled by another hormone, called thyroid-stimulating hormone (TSH). TSH is produced in the pituitary gland. If your thyroid hormones are low, TSH increases in order to stimulate your thyroid to make more hormones. If your thyroid hormones are high, TSH is low, signaling the thyroid to make fewer hormones. An easy way to remember this is to note that TSH and thyroid hormone levels are usually opposite; if TSH is high, then thyroid hormones are usually low, and vice versa.
High TSH can stimulate the growth of goiters and some thyroid cancers. Therefore, giving extra thyroid hormone in the form of thyroid USP will decrease TSH, which can help to shrink goiters and some thyroid cancers.

How Does Thyroid USP Work?

The thyroid gland makes two different thyroid hormones: triiodothyronine (T3) and thyroid USP (T4). Usually, the thyroid gland produces much more T4 than T3; however, T3 is much more active than T4. The body can convert the T4 hormone into T3 as necessary. If your thyroid does not make enough thyroid hormones, there are a few different ways to increase your levels.
Most people with an underactive thyroid are treated with synthetic T4, also known as levothyroxine (Levothroid®, Levoxyl®, Synthroid®, Tirosint®, Unithroid®). However, some people prefer to be treated with natural thyroid products, such as thyroid USP. The medication is made from pig thyroid glands, so it contains both T3 and T4.

Is Thyroid USP Used in Children?

Thyroid USP is approved to treat thyroid problems in children and infants. Talk with your healthcare provider about the benefits and risks of using the drug in children.
Last reviewed by: Kristi Monson, PharmD
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