Synthroid Side Effects

Background Information for Synthroid

Synthroid is typically used as a hormone replacement therapy for a hormone normally produced by the thyroid to control your body's energy and metabolism. Hypothyroidism occurs when you have an underactive thyroid. The U.S. Food and Drug Administration (FDA) approved levothyroxine sodium for treatment of hypothyroidism. Some familiar brand names for levothyroxine sodium are Synthroid, Levoxyl, and Levothroid. Synthroid can also be used for other purposes, including the treatment or prevention of goiter. Synthroid has been manufactured since 1955.

WARNING: Before taking Synthroid, tell your doctor if you have heart disease, coronary artery disease, anemia, diabetes, adrenal or pituitary gland problems, or a history of blood clots. Tell your dentist if you are taking Synthroid before any other medications are administered to you.

The FDA announced in October 2007, that it was requiring tighter potency specifications for levothyroxine sodium to ensure that the medication retains its effectiveness over the shelf-life of the product. This FDA action came after some endocrinologists expressed concern in 2005 about the performance of the levothyroxine sodium products. Many patients who are prescribed Synthroid must take the medication every day for the rest of their lives. Side effects can occur when a patient suddenly stops taking Synthroid or if the medication has lost its potency over time.

WARNING: Different brands of levothyroxine sodium may not work the same. Do not change brands or use the generic version of Synthroid without consulting your doctor. Stop using Synthroid and seek emergency medical attention if you experience allergic reactions including: hives, rash, difficulty breathing, swelling of your face, lips, tongue, or throat.

Things You Should Know About Synthroid