Det aktive stof i Firmagon, degarelix, er en antagonist til det gonadotrophinfrigørende hormon, hvilket betyder, at det hæmmer virkningen af et naturligt hormon kaldet gonadotrophinfrigørende hormon (GnRH).
The active substance in Firmagon, degarelix, is a gonadotrophin-releasing hormone antagonist, which means that it blocks the effects of a natural hormone called gonadotrophin-releasing hormone (GnRH).