Synthroid (levothyroxine) is a brand-name drug that’s prescribed for hypothyroidism and thyroid cancer in adults and children. Synthroid comes as an oral tablet that’s typically taken once per day.

Levothyroxine is a generic prescription drug used to treat hypothyroidism and thyroid cancer in certain situations. The drug comes as an oral tablet. You usually take it once daily. Levothyroxine is ...