The U.S. Food and Drug Administration approved Emcitate (tiratricol) tablets for oral suspension to treat peripheral thyrotoxicosis (excess thyroid hormone levels in the blood that causes symptoms, such as rapid heart rate, increased blood pressure and adverse effects on metabolism) in patients with MCT8 deficiency, also known as Allan-Herndon-Dudley syndrome.

Levothyroxine sodium is used to treat a sluggish thyroid gland (hypothyroidism).

Many doctors believe that desiccated thyroid gland (Armour, etc.) is unreliable, but many patients feel better on it.

Research shows greater bone loss among seniors taking levothyroxine, suggesting thyroid treatment linked to osteoporosis.