Levoxyl is the synthetic version of a hormone produced by the thyroid gland. It is used to treat thyroid disorders like hypothyroidism. Levoxyl is a thyroid hormone that is indicated for the treatment of hypothyroidism, a condition characterized by the thyroid gland's inability to produce enough thyroid hormone. Levoxyl is also used to treat congenital hypothyroidism and enlarged thyroid gland (goiter). Additionally, Levoxyl is used during surgery together with radioactive therapy to treat thyroid cancer. Under the direction of a doctor, Levoxyl can be used to treat infertility caused by low thyroid hormones. Levoxyl belongs to a class of drugs known as hormones. It works by reinstating the thyroid hormone created naturally by the body. Levoxyl is typically used once every twenty-four hours, half an hour to one hour before breakfast.