Define pharmaceutical: of, relating to, or engaged in pharmacy or the manufacture and sale of pharmaceuticals â pharmaceutical in a sentence of, relating to, or engaged in pharmacy or the manufacture and sale of pharmaceuticalsâ¦ See the full definition
Hypothyroidism (underactive thyroid) Overview. Hypothyroidism (underactive thyroid) is a condition in which your thyroid gland doesn't produce enough of certain important hormones. Women, especially those older than age 60, are more likely to have hypothyroidism. Hypothyroidism upsets the normal balance of chemical reactions in your body.
The thyroid gland is a butterfly-shaped organ located in the base of your neck. It releases hormones that control metabolismâthe way your body uses energy. The thyroid's hormones regulate vital body functions, including: 1  Breathing. 2  Heart rate. 3  Central and peripheral nervous systems.t releases hormones that control metabolismâthe way your body uses energy. The thyroid's hormones regulate vital body functions, including: 1  Breathing. 2  Heart rate. 3  Central and peripheral nervous systems.