Doctors answers to frequently asked questions for patients taking any form of levothyroxine.

Information from the RxList.

Information for patients from DrugDigest on dosage, usage, side effects, and interactions. Brand names include Eltroxin, Levothroid, Levoxine, Levoxyl, Synthroid, and Unithroid.

Information about this medication used in thyroid hormone replacement therapy, sold under brand names including Synthroid, Levoxyl, Levothroid, and Unithroid. MedicineNet State of the Art Medical Information.

Manufacturer's site for this brand of levothyroxine sodium. Includes product and prescribing information, and discussion of US FDA requirements for potency and stability.

Product information for Glaxo Wellcome's brand of levothyroxine sodium, a synthetic hormone used in thyroid replacement therapy.

Information for family physicians and prescribing information.

Information for patients, healthcare providers, and pharmacists.