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Peptide library / Sexual & reproductive / Ganirelix

FDA-approvedSexual & reproductive

Ganirelix

A GnRH antagonist used in IVF to prevent early ovulation.

Body system
Sexual & reproductive
Status
FDA-approved
Strongest evidence
FDA approved
Also known as
Fyremadel

Effects studied or claimed

What it is used or promoted for, and where each effect has actually been seen

  • Prevent premature ovulation in IVFFDA approved

How it is thought to work

Ganirelix works like cetrorelix by blocking GnRH receptors on the pituitary.

What the evidence shows

Compared with leuprolide protocols, it requires fewer days of injection.

Safety and unknowns

Injection site reactions are common.

Regulatory status

FDA-approved in 1999.

Regulatory status changes quickly. This entry was last reviewed on 27 October 2026. Confirm current status with the FDA before relying on it.

Sources

More in Sexual & reproductive

Gonadorelin

FDA-approved
Sexual & reproductive · GnRH, Factrel

The natural ten amino acid hormone that switches on the pituitary-gonad axis.

EvidenceFDA approved

Goserelin

FDA-approved
Sexual & reproductive · Zoladex

A GnRH agonist implant for hormone-sensitive cancers and endometriosis.

EvidenceFDA approved

Cetrorelix

FDA-approved
Sexual & reproductive · Cetrotide

A GnRH antagonist that prevents early ovulation during IVF.

EvidenceFDA approved
← CetrorelixAll peptidesGonadorelin →

General information, not medical advice. Do not buy or inject unregulated peptides.