*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 (Levothroid, Levoxyl, Synthroid) is a thyroid supplement which is used to treat hypothyroidism (underactive thyroid). Levothyroxine does not have any common side effects when taken at correct doses.Side effects may occur for those taking too much or too little levothyroxine.evothyroxine 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. Generally, levothyroxine has few side effects since it is a replacement for a naturally occurring hormone.