What Is Synthroid (Levothyroxine)

---

Synthroid (Levothyroxine) is a thyroid hormone used to treat hypothyroidism. It may also be used to treat other conditions as determined by your doctor.

Uses Of Synthroid (Levothyroxine)

---

• Synthroid is a replacement for a hormone that is normally produced by your thyroid gland to regulate the body's energy and metabolism. Synthroid is given when the thyroid does not produce enough of this hormone on its own.
• Synthroid treats hypothyroidism (low thyroid hormone). Synthroid is also used to treat or prevent goiter (enlarged thyroid gland), which can be caused by hormone imbalances, radiation treatment, surgery, or cancer.
• Synthroid should not be used to treat obesity or weight problems.
• Synthroid may also be used for purposes other than those listed in this medication guide.