Question: what is the difference between levothyroxine and thyroxine?
Answer: Levothyroxine is a synthetic (man-made) version of thyroxine, or T4, the main hormone that is made and released by your thyroid gland. 1﻿ Levothyroxine is prescribed for people with an underactive thyroid, a condition known as hypothyroidism. Most medications are available in brand name and generic preparations.