Who are Antagon ™'s main competitors?

Direct comparators (same drug class / molecular target / therapeutic area): Lupron, Micronor, Gonapeptyl®, LhRH-antagonist, Ultra-Long GnRH Agonists + Letrozole, Cetrorelix and Leuprolide.

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Last reviewed 2026-05-13 · How we verify

Antagon ™ — Competitive Intelligence Brief

Antagon ™ (Antagon ™) competitive landscape: 6 comparators, recent regulatory actions, upcoming PDUFA, patent timeline. Class: GnRH antagonist. Area: Reproductive Medicine / Fertility.

marketed GnRH antagonist GnRH receptor Reproductive Medicine / Fertility Small molecule Live · refreshed every 30 min

Target snapshot

Antagon ™ (Antagon ™) — EMD Serono. Antagon is a gonadotropin-releasing hormone (GnRH) antagonist that rapidly suppresses luteinizing hormone (LH) and follicle-stimulating hormone (FSH) to prevent premature ovulation during assisted reproductive technology.

Comparator set (6 drugs)

Auto-detected by same drug class / molecular target / therapeutic area, ranked by phase + recency. Override with ?vs=slug1,slug2,….

Drug	Generic	Sponsor	Phase	Class	Target	Approval / PDUFA
Antagon ™ TARGET	Antagon ™	EMD Serono	marketed	GnRH antagonist	GnRH receptor
Lupron	leuprorelin	Accord Healthcare S.L.U.	marketed	Gonadotropin Releasing Hormone Receptor Agonist	GnRH receptors	1985-01-01
Micronor	norethisterone	Johnson & Johnson	marketed	Progestin	GnRH receptors	1962-01-01
Gonapeptyl®	Gonapeptyl®	University Hospital, Ghent	marketed	GnRH agonist	GnRH receptor
LhRH-antagonist	LhRH-antagonist	Turku University Hospital	marketed	GnRH/LhRH antagonist	GnRH receptor (LhRH receptor)
Ultra-Long GnRH Agonists + Letrozole	Ultra-Long GnRH Agonists + Letrozole	University of Palermo	marketed	GnRH agonist + aromatase inhibitor combination	GnRH receptor; aromatase (CYP19A1)
Cetrorelix and Leuprolide	Cetrorelix and Leuprolide	Instituto Valenciano de Infertilidad, IVI VALENCIA	marketed	GnRH antagonist and GnRH agonist combination	GnRH receptor

Recent regulatory actions (last 90 days)

No regulatory actions in the last 90 days for this set.

Upcoming PDUFA dates (next 180 days)

No PDUFA dates in the next 180 days for this set.

Patent timeline (forward window)

2028-03-22 — Lupron · 9617303 · US
2031-02-05 — Lupron · 8921326 · US

Sponsor landscape (GnRH antagonist class)

Jiangsu HengRui Medicine Co., Ltd. · 2 drugs in this class
Instituto Valenciano de Infertilidad, IVI VALENCIA · 2 drugs in this class
AEterna Zentaris · 2 drugs in this class
El Shatby University Hospital for Obstetrics and Gynecology · 1 drug in this class
Eugonia · 1 drug in this class
Instituto de Investigacion Sanitaria La Fe · 1 drug in this class
Merck KGaA, Darmstadt, Germany · 1 drug in this class
Rabin Medical Center · 1 drug in this class
Sumitomo Pharma Switzerland GmbH · 1 drug in this class
University of Edinburgh · 1 drug in this class

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Cite this brief

Drug Landscape (2026). Antagon ™ — Competitive Intelligence Brief. https://druglandscape.com/ci/antagon. Accessed 2026-05-13.

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