Gonadotropin-releasing hormone agonist

From WikiMD's Medical Encyclopedia

Gonadotropin-releasing hormone agonist (GnRH agonist) is a type of medication that affects the production of sex hormones in the body. It is used in the treatment of several medical conditions, including prostate cancer, uterine fibroids, endometriosis, and in assisted reproduction.

Mechanism of action[edit]

GnRH agonists work by binding to gonadotropin-releasing hormone (GnRH) receptors in the pituitary gland. This initially leads to an increase in the production of luteinizing hormone (LH) and follicle-stimulating hormone (FSH), which in turn stimulate the production of sex hormones. However, with continued use of GnRH agonists, the pituitary gland becomes desensitized to GnRH, leading to a decrease in LH and FSH production and a subsequent decrease in sex hormone production.

Uses[edit]

GnRH agonists are used in the treatment of several medical conditions, including:

  • Prostate cancer: GnRH agonists are used to reduce testosterone levels, which can slow the growth of prostate cancer cells.
  • Uterine fibroids: By reducing estrogen levels, GnRH agonists can help to shrink uterine fibroids.
  • Endometriosis: GnRH agonists can help to reduce the symptoms of endometriosis by reducing estrogen levels.
  • Assisted reproduction: GnRH agonists are used in in vitro fertilization (IVF) to prevent premature ovulation.

Side effects[edit]

Common side effects of GnRH agonists include hot flashes, decreased libido, erectile dysfunction, and bone loss. Some of these side effects can be managed with additional medications.

See also[edit]

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