What is the classification of levothyroxine?

Levothyroxine is in a class of medications called hormones. It works by replacing thyroid hormone that is normally produced by the body.

3 DOSAGE FORMS AND STRENGTHS

Tablet Strength Tablet Color/Shape Tablet Markings
25 mcg Orange/Round “SYNTHROID” and “25”
50 mcg White/Round “SYNTHROID” and “50”
75 mcg Violet/Round “SYNTHROID” and “75”
88 mcg Olive/Round “SYNTHROID” and “88”

Beside above, what is the mechanism of action of levothyroxine? Mechanism of action T4 and T3 bind to thyroid receptor proteins in the cell nucleus and cause metabolic effects through the control of DNA transcription and protein synthesis. Like its naturally secreted counterpart, levothyroxine is a chiral compound in the L-form.

In respect to this, are all brands of levothyroxine the same?

Several brand-name synthetic levothyroxine preparations are currently available. These include Levothroid, Levoxyl, Synthroid, Tirosint and Unithroid in the United States; and Eltroxin and Euthyrox in Canada. Although all these medications are synthetic levothyroxine, they are not identical.

What is levothyroxine used for?

Levothyroxine is used to treat an underactive thyroid (hypothyroidism). It replaces or provides more thyroid hormone, which is normally produced by the thyroid gland. Low thyroid hormone levels can occur naturally or when the thyroid gland is injured by radiation/medications or removed by surgery.

What are the long term side effects of levothyroxine?

The more common side effects of levothyroxine can include: increased appetite. weight loss. heat sensitivity. excessive sweating. headache. hyperactivity. nervousness. anxiety.

How much levothyroxine is too much?

You shouldn’t take more levothyroxine than your doctor prescribes. If you take too much of the drug, you may develop symptoms of overactive thyroid, including fatigue, sensitivity to heat, increased appetite, and sweating. Symptoms of a levothyroxine overdose may also include: Confusion and disorientation.

Is 25 mcg levothyroxine a lot?

Treatment of hypothyroidism with levothyroxine is effective, but starting doses vary. Traditionally, lower starting doses of 25 to 50 mcg per day are recommended for patients 65 years and older or who have ischemic heart disease.

What are the doses of levothyroxine?

The average full replacement dose of levothyroxine sodium is approximately 1.7 mcg/kg/day (e.g., 100-125 mcg/day for a 70 kg adult). Older patients may require less than 1 mcg/kg/day. Levothyroxine sodium doses greater than 200 mcg/day are seldom required.

What is the difference between Synthroid and levothyroxine?

Are Synthroid and Levothroid the Same Thing? Synthroid (levothyroxine sodium) and Levothroid (levothyroxine sodium) are replacements for hormones produced by the human thyroid gland used to treat hypothyroidism (low thyroid hormone). Synthroid is also used for pituitary TSH suppression.

How quickly does levothyroxine work?

Absorption is increased when levothyroxine is taken on an empty stomach. May take several weeks for an improvement in symptoms to be seen and up to 4 to 6 weeks for peak blood levels to be reached.

What happens if you stop taking levothyroxine?

If you stop taking levothyroxine your symptoms are likely to come back. High doses of levothyroxine over a long time can sometimes cause weakening of the bones (osteoporosis). This shouldn’t happen if you are on the right dose. It’s important to have regular blood tests to make sure your dose isn’t too high.

What is levothyroxine 50 mg used for?

Levothyroxine is used to treat an underactive thyroid gland (hypothyroidism). It replaces or provides more thyroid hormone, which is normally produced by the thyroid gland. Low thyroid hormone levels can occur naturally or when the thyroid gland is injured by radiation/medications or removed by surgery.

What is levothyroxine made of?

Levothyroxine Preparations Levothyroxine is a synthetic (man-made) version of thyroxine, or T4, the main hormone that is made and released by your thyroid gland. 1? Levothyroxine is prescribed for people with an underactive thyroid, a condition known as hypothyroidism.

Who is the manufacturer of levothyroxine?

Randomized crossover study using 8 weeks of the generic formulation of levothyroxine (manufactured by Abbott, then 8 weeks of brand name levothyroxine (Synthroid, manufactured by Abbott).

Can levothyroxine cause hair loss?

How Thyroid Hormones Cause Hair Loss. Ironically, taking the hormone levothyroxine to treat an underactive thyroid can contribute to some hair loss, among other side effects, but this seems to be more common within the first month of treatment and more often in children than adults.

Is levothyroxine safe?

When taken as prescribed, levothyroxine is a safe medication to treat thyroid-related disorders. However, when this drug is abused, or mixed with substances that increase the drug’s potency, there is a risk of overdose.

What is generic for levothyroxine?

Synthetic thyroxine (T4) comes as brand-name Synthroid or generic levothyroxine. T4 is what is known as a “prohormone”; it’s made by the thyroid gland and gets converted to the active hormone, T3, in other body tissues.

Is there a substitute for levothyroxine?

Armour Thyroid and levothyroxine are not interchangeable, so 1 mg of Armour Thyroid is not the same as 1 mg of levothyroxine. You cannot substitute Armour Thyroid for levothyroxine and will need to get a new prescription from your doctor.