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  • Title: Can pegylated interferon α 2a cause development of thyroid disorders in patients with chronic hepatitis B?
    Author: Kozielewicz D, Zaleśna A, Dybowska D.
    Journal: Expert Opin Drug Saf; 2014 Aug; 13(8):1009-14. PubMed ID: 24930451.
    Abstract:
    INTRODUCTION: Hepatitis B virus infection is treated with pegylated (Peg) IFNα and nucleos(t)ide analogues. The disadvantages of PegIFNα include thyroid disorders. In this single-center study, the type, incidence and consequences of thyroid dysfunction in patients receiving PegIFNα due to chronic hepatitis B (CHB) were analyzed. PATIENTS AND METHODS: The analysis included 106 patients (80 males) with CHB, aged 20 - 58 years, treated with PegIFNα-2a at a dose of 180 μg/week subcutaneously for 48 weeks. The levels of thyroid-stimulating hormone (TSH) and thyroid antibodies (TAbs) that is anti-thyroid peroxidase antibodies (TPOAb) and thyroglobulin antibodies were measured in all patients at baseline. Furthermore, TSH was measured every 3 months during treatment and for 12 months after completion of treatment. If the TSH level was abnormal, free thyroxine 4 levels and TAbs were measured. RESULTS: All patients started the therapy with normal TSH and TAb levels. In 99 patients, TSH levels remained normal throughout the therapy. Thyroid disorder occurred in seven patients (6.6%), six of whom developed hypothyroidism and one who developed hyperthyroidism. Thyroid dysfunction was diagnosed in six women and one man. TAbs (only TPOAbs) were found in two patients (1.88%). CONCLUSIONS: Thyroid disorder is a rare, though possible not transient, complication of IFN therapy in CHB patients.
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