Levothyroxine is a generic drug prescribed for hypothyroidism (low thyroid hormone levels) and certain thyroid cancers. As with other drugs, levothyroxine can cause side effects, such as hair loss ...

Levothyroxine (Synthroid) is an oral medication used to treat hypothyroidism (underactive thyroid). It's a lab-made version of the T4 thyroid hormone. It's important to stick to the same levothyroxine ...