Treatment by Condition Related to phentermine. Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, expect as may be authorized by the applicable terms of use. CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals.
Many diseases and conditions can cause hyperthyroidism, including: 1  Graves disease (most common cause of hyperthyroidism)  Inflammation (thyroiditis) of the thyroid due to viral infections, some medicines, or after pregnancy (common)
About Hyperthyroidism. The thyroid gland is a part of the body's endocrine (hormone) system â which is made up of the glands that help regulate many of the body's different functions. An overactive thyroid produces too much of the thyroid hormone thyroxine, which causes some of these functions to speed up.Hyperthyroidism is the medical term for an overactive thyroid gland. Too little thyroxine reverses the process and slows down the body's functions.n overactive thyroid produces too much of the thyroid hormone thyroxine, which causes some of these functions to speed up. Hyperthyroidism is the medical term for an overactive thyroid gland.