Antiglucocorticoid in the context of "Glucocorticoid receptor"

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⭐ Core Definition: Antiglucocorticoid

Antiglucocorticoid drugs are a class of medications that act to reduce the effects of glucocorticoids, primarily cortisol, in the body. They include direct glucocorticoid receptor antagonists such as mifepristone and synthesis inhibitors such as metyrapone, ketoconazole, and aminoglutethimide. They are used to treat Cushing's syndrome.

These drugs have also been investigated for their potential therapeutic benefits in various psychiatric disorders, particularly depression and psychosis. The rationale behind using antiglucocorticoids in psychiatry stems from the observed dysregulation of the hypothalamic-pituitary-adrenal (HPA) axis in many psychiatric conditions, which often manifests as elevated cortisol levels.

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Antiglucocorticoid in the context of Mifepristone

Mifepristone, and also known by its developmental code name RU-486, is a drug typically used in combination with misoprostol to bring about a medical abortion during pregnancy. This combination is 97% effective during the first 63 days (9 weeks) of pregnancy, and is effective in the second trimester as well. It is also used on its own to treat Cushing's syndrome or in low doses as an emergency contraceptive.

The most common adverse effects include abdominal pain, feeling tired, and vaginal bleeding. Serious side effects may include heavy vaginal bleeding, bacterial infection, and, if pregnant, birth defects. When used, appropriate follow-up care needs to be available. Mifepristone is primarily an antiprogestogen. It works by blocking the effects of progesterone, making both the cervix and uterine vessels dilate and causing uterine contraction. Mifepristone also works, to a lesser extent, as an antiglucocorticoid and diminishes the effects of hypercortisolism.

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