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Efficacy of combined levothyroxine and liothyronine as compared with levothyroxine monotherapy in primary hypothyroidism: a randomized controlled trial.

Author(s): Valizadeh M, Seyyed-Majidi MR, Hajibeigloo H, Momtazi S, Musavinasab N, Hayatbakhsh MR

Affiliation(s): Department of Internal Medicine, Zanjan Faculty of Medicine, Zanjan University of Medical Science, Zanjan, Islamic Republic of Iran.

Publication date & source: 2009, Endocr Res., 34(3):80-9.

Publication type: Randomized Controlled Trial

OBJECTIVES: To examine the efficacy of combination therapy with levothyroxine and liothyronine in improvement of general health, psychological problems, and metabolic status in primary hypothyroidism. METHODS: Seventy-one patients diagnosed with primary hypothyroidism were randomly allocated into two study groups: the first group received usual dose of levothyroxine and the second group received combination of levothyroxine and liothyronine for at least 4 months. The main outcomes were psychosocial problems (Goldberg's General Health Questionnaire, GHQ-28), bodyweight, heart rate, blood pressure, and serum lipid levels. RESULTS: In both groups serum thyroid-stimulating hormone levels remained unchanged compared with baseline. Psychosocial scores, body weight, heart rate, blood pressure, and lipid profile in the two groups remained constant. The only exception was a small but significant reduction in anxiety/insomnia in combined treatment group as compared with monotherapy. CONCLUSIONS: The data do not support the hypothesis that combined therapy improves the well-being and general health of patients.

Page last updated: 2009-10-20

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