Levothyroid, pronounced /liːvəʊˈθaɪrɔɪd/, is a medication used to treat an underactive thyroid gland, also known as hypothyroidism. The word "levothyroid" is spelled using the Greek prefix "levo-", which means "left" or "counterclockwise", and the suffix "-thyroid", which refers to the thyroid gland. The medication is called "levothyroid" because it contains the left-handed isomer of thyroxine, the hormone produced by the thyroid gland. This isomer is called "L-thyroxine", and it is the active ingredient in the medication.
Levothyroid is a synthetic form or preparation of the hormone thyroxine (T4) that is used to manage and treat various thyroid disorders, particularly hypothyroidism. Hypothyroidism is a condition characterized by the insufficient production of thyroid hormones by the thyroid gland, leading to symptoms such as fatigue, weight gain, cold intolerance, and depression. Levothyroid is prescribed to supplement the levels of thyroid hormones in the body, helping to restore normal thyroid function and alleviate associated symptoms.
Levothyroid contains the active ingredient levothyroxine sodium, which is chemically identical to the hormone thyroxine produced naturally by the thyroid gland. It works by replacing or supplementing the inadequate production of thyroxine, thus regulating metabolism, growth, and other essential bodily functions. By providing the body with the necessary thyroxine, Levothyroid helps to maintain or restore optimal thyroid hormone levels.
Levothyroid is typically administered orally in tablet form and is available in various strengths depending on the individual's specific condition and treatment needs. It is important to follow the prescribed dosage regimen as directed by a healthcare professional, as taking too much or too little can lead to complications or ineffective treatment. Regular monitoring of thyroid hormone levels through blood tests is often necessary to ensure appropriate dosage adjustments. As with any medication, there may be potential side effects, drug interactions, or contraindications, so it is essential to consult with a healthcare provider before starting or modifying Levothyroid treatment.