[224] Patients taking Rifampin and anticonvulsants that influence the metabolism of L-T4 may also need an increase in their dose of L-T4 to maintain the TSH within the therapeutic target range.

Elevated thyrotropin levels were associated with an increased risk for depression, especially among women and those with hypothyroidism.

If your TSH levels come back low, your doctor will then evaluate your levels of T4 and T3 to see if they’re within the normal ranges. In order to perform these tests, your doctor will need to ...

Although 84.4% of patients who developed hypothyroidism had preoperative TSH levels within the normal range (0.5–4.0 mIU/l), the incidence of postoperative hypothyroidism was greater among ...

Medically reviewed by Kelly Wood, MD Normal thyroid-stimulating hormone (TSH) levels generally fall between 0.4 and 4.5 ...

Historically, the "quality" of a serum TSH method has been determined from a clinical benchmark - the assay's ability to discriminate euthyroid levels (~ 0.4 to 4.0 mIU/L) from the profoundly low ...