Endocrinology

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Widespread prescribing of levothyroxine for borderline TSH levels

KEY POINT

The median thyroid stimulating hormone (TSH) level threshold to initiate levothyroxine treatment declined from 8.7 mIU/L to 7.9 mIU/L between 2001 and 2009, leading to a significant risk for developing suppressed TSH levels after therapy.