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)
Continue ReadingHyperthyroidism: Causes. When you have hyperthyroidism, your body is producing excessive amounts of the thyroid hormones T3 and T4. Since these hormones regulate your metabolism (how your body processes and uses energy), having too high a level will cause symptoms related to a high metabolism.