*This statement summarizes the third USPSTF recommendations for screening for chlamydial infection and the supporting scientific evidence, and it updates the 1995 recommendations contained in the Guide to Clinical Preventive Services, second edition (1).
Older adults may be more sensitive to the side effects of this drug, especially fast/pounding/irregular heartbeat. Current information shows that this drug may be used during pregnancy. Tell your doctor if you are pregnant because your dose may need to be adjusted. Levothyroxine passes into breast milk but is unlikely to harm a nursing infant.
A: Levothyroxine is a synthetic replacement for a hormone that is normally produced by your thyroid gland to regulate the body's energy and metabolism. It is given when the thyroid does not produce enough of this hormone on its own.Levothyroxine is used to treat hypothyroidism (low thyroid hormone) and to treat or prevent goiter (enlarged thyroid gland), which can be caused by hormone imbalances, radiation treatment, surgery, or cancer.evothyroxine is used to treat hypothyroidism, or low thyroid levels. Symptoms of low thyroid levels include feeling tired, depressed, dry skin or brittle nails, weight gain, problems with thinking or memory, and sensitivity to the cold.