
Synthroid (Levothyroxine): Indications, Side effects, Interactions, and Overdose
Levothyroxine is a prescription medication that is used to treat hypothyroidism (underactive thyroid gland). Levothyroxine works by mimicking the activity of the natural hormone that is normally generated by the thyroid gland. Levothyroxine is a medication that is generally taken for life to maintain normal thyroid function.