Thyroid-stimulating hormone normal range

O In most patients with thyroid hormone disorders, the measurement of a serum thyroid-stimulating hormone (TSH) level is adequate for the diagnosis of hypothyroidism and hyperthyroidism. The target TSH for most patients being treated for thyroid disorders should be the mean normal value of 1.4 milliunits/L or 1.4 microunits/mL (target range 0.5-2.5 milliunits/L or 0.5-2.5 microunits/mL). 

A 19-year-old woman with mild mental retardation and a history of birth anoxia who took olanzapine 15 mg/day for 3 weeks developed euprolactinemic galactorrhea (156). Laboratory tests were all normal, including a normal thyroid-stimulating hormone concentration and a prolactin concentration of 13 ng/ml (reference range 3-30 ng/ml). She had mild to moderate akathisia. Both the galactorrhea and the akathisia abated after substitution by quetiapine. 

Serum thyroid-stimulating hormone (TSH) and thyroid hormone levels should be measured in any patient with a goiter to determine the hormonal status. TSH concentrations increase with age, but the levels remain within the normal range in the healthy population throughout life up to 100 years of age (Canaris et al., 2000 Mariotti et al, 1995). See Chapter 106 by Diez and Iglesias on Hypothyroidism in the Middle Aged and Elderly Clinical Aspects for details of thyroid hormone changes in the elderly. Serum calcitonin levels are not needed unless there is a family history of medullary thyroid cancer or multiple endocrine neoplasia (MEN) type 2. 

Serum thyroid stimulating hormone (TSH) was measured by a modification of the double antibody technique.The normal range is 5 yoU/ml. 

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