Levothyroxine

Also known as Synthroid it is a synthetic form of thyroid hormone The hormone normally secreted by the follicular cells of the thyroide gland Levothyroxine is used to treat thyroide hormone deficiency and occasionally to prevent the recurrence of thyroid cancer Levothyroxine differs from natural thyroxine in that it is chemically in the chiral L-form The related drug dextothyroxine was used in the past as a treatment for hypercholesterolemia but was withdrawn due to cardiac side effects