TSH stimulates the thyroid gland to release thyroxine. Its levels are controlled by thyroxine in a negative feedback loop, with greater levels of thyroxine leading to a decreased TSH production.

BACKGROUND: Prescribing of levothyroxine and rates of thyroid function testing may be sensitive to minor changes in the upper limit of the reference range for thyroid-stimulating hormone (TSH) that ...

In 2009, patients with TSH levels of ≤10 mIU/L were prescribed levothyroxine more frequently compared with those treated in 2001 (OR=1.30; 95% CI, 1.19-1.42), according to data.

Researchers conducted a cohort study to assess the predictive utility of thyroid hormones in mortality and cardiovascular disease risks among older men.

I have been on levothyroxine since, and my blood work has my TSH at 0.36, although optimal levels are 0.04 to 4.0. Should my number be higher, as most people have levels in the 2’s.

Using levothyroxine to treat subclinical hypothyroidism should be considered on a patient-by-patient basis and be started only after at least two thyroid-stimulating-hormone (TSH) tests show an ...

ORLANDO, Fla. — Switching from a once-daily dose of levothyroxine to a once-weekly dose that is 7 times the amount of the daily dose is effective for treating hypothyroidism and achieving ...

Normal TSH levels, defined by Yale, are between 0.27 and 4.2 mIU/L. Recent work has indicated that levothyroxine will not help patients who have natural levels under 7.0 mIU/L. While changing the ...

They were divided into 3 groups: Group 1: patients with TSH ≤4.2 assigned weekly levothyroxine at a dose 7-fold of the normal dose; Group 2: patients with TSH >4.2 assigned weekly levothyroxine ...

Although recent recommendations give target TSH levels in pregnancy, the doses of levothyroxine needed to attain these levels are not specified, say Dr. Abalovich and his colleagues in their study ...