In most cases, these drugs can completely control hypothyroidism
, typically relieving symptoms and returning thyroid hormone levels to normal in six to eight weeks. During treatment, levels of TSH and T4
are measured using a simple blood test.
However, underactive thyroid medications are not "one-size-fits-all" drugs, and there is no "standard" dose that is right for every single person. People have varying degrees of hypothyroidism and, as a result, their dose is tailored accordingly. In addition, the dose may need to be changed as a person ages or during a woman's pregnancy.
(Click Treatment for Underactive Thyroid to learn more about how this condition is treated, including how a person's medication dosage is determined, how long treatment lasts, and how these drugs work.)