List of the 2 NDC products with the active ingredient Elagolix Sodium. This medication is used by women to help relieve moderate to severe pain due to a condition called endometriosis. Endometriosis is the growth of tissue that normally lines the inside of the womb (uterus) in a different place, such as on the outside surface of the uterus, on the ovaries, or on other organs. This condition may cause symptoms such as painful/heavy/irregular menstrual periods, pain during or after sex, or infertility. Elagolix works by decreasing your body's production of certain hormones (luteinizing hormone, follicle-stimulating hormone), which leads to lower amounts of female sex hormones (estrogens). These lower levels may help decrease some symptoms of endometriosis.