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Elevated Serum Concentrations of Triiodothyronine in Hypothyroid PatientsValues for Patients Receiving USP Thyroid
Robert Penny, MD;
S. Douglas Frasier, MD
Am J Dis Child. 1980;134(1):16-18.
Abstract
Serum concentrations of thyroxine (T4), triiodothyronine (T3), and thyroid-stimulating hormone (TSH) were measured for 14 hypothyroid patients while they were receiving USP desiccated thyroid and after six weeks of therapy with comparable doses of levothyroxine sodium (Na-l-thyroxine). Therapy with USP thyroid caused supraphysiologic elevations in the concentration of T3 in 13 patients. Treatment with levothyroxine resulted in serum concentrations of T3 that were within the range of normal. We believe the preferable therapy for hypothyroidism is levothyroxine.
(Am J Dis Child 134:16-18, 1980)
Author Affiliations
From the Department of Pediatrics, University of Southern California School of Medicine (Drs Penny and Frasier), Los Angeles; and the Los Angeles County-University of Southern California Medical Center (Drs Penny and Frasier), Los Angeles.
Footnotes
Reprint requests to Los Angeles County-University of Southern California Medical Center, 1801 Marengo St, 2G11, Los Angeles, CA 90033 (Dr Penny).
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