Ganirelix

Ganirelix acetate (or diacetate) is an injectable gonadotropin-releasing hormone antagonist (GnRH antagonist). It is primarily used in assisted reproduction to control ovulation. The drug works by blocking the action of GnRH upon the pituitary, thus rapidly suppressing the production and action of LH and FSH. It is administered as a daily subcutaneous injection.

Ganirelix is marketed by Organon International as Antagon.