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| Web Pages |
| Levothyroxine |
| Information from the RxList. |
| Synthroid |
| Information for patients, healthcare providers, and pharmacists. |
| Drug InfoNet - Synthroid |
| Doctors answers to frequently asked questions for patients taking any form of levothyroxine. |
| Levothyroxine Sodium |
| 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. |
| Levothyroxine |
| Information for patients from DrugDigest on dosage, usage, side effects, and interactions. Brand names include Eltroxin, Levothroid, Levoxine, Levoxyl, Synthroid, and Unithroid. |
| RXMed: Eltroxin |
| Product information for Glaxo Wellcome's brand of levothyroxine sodium, a synthetic hormone used in thyroid replacement therapy. |
| RXmed: Synthroid |
| Information for family physicians and prescribing information. |
| Levoxyl |
| Manufacturer's site for this brand of levothyroxine sodium. Includes product and prescribing information, and discussion of US FDA requirements for potency and stability. |