Definition: degarelix (DEH-guh-REH-lix) A drug that is used to treat advanced prostate cancer and is also being studied in the treatment of benign prostatic hyperplasia. Degarelix binds to gonadotropin-releasing hormone (GnRH) receptors in the pituitary gland. This causes the body to stop making testosterone, which prostate cancer needs to grow. Degarelix is a type of GnRH antagonist. Also called Firmagon.

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