Comparison
Goserelin vs. Nafarelin
Two peptides side-by-side — identity, evidence base, legal status and known adverse events.
Identity
Category
Research other
Research other
CAS no.
65807-02-5
no data
Molecular weight
1269.43 g/mol
no data
Half-life
4.2 h
no data
Sequence
pGlu-His-Trp-Ser-Tyr-D-Ser(tBu)-Leu-Arg-Pro-Azgly-NH2no data
Mechanism of action
Goserelin
As a GnRH agonist, goserelin binds to the GnRH receptors of the pituitary gland. Initial stimulation transiently raises luteinizing hormone (LH) and follicle-stimulating hormone (FSH). With continuous receptor occupancy, however, the receptors become desensitized and down-regulated, which reduces LH and FSH secretion and consequently the production of testosterone or estrogen. This mechanistic relationship is documented in the pharmacological literature.
Nafarelin
Nafarelin is a potent GnRH agonist: after an initial stimulation ('flare'), continuous receptor occupancy leads to downregulation and thereby suppression of LH, FSH and the downstream sex hormones.
Evidence base
Highest evidence
Human RCT
Human RCT
Studies
4
0
of which in humans
4
0
Effects recorded
3
2
Open conflicts
1
0
Documented adverse events
2
1
Legal status
Full entries
Frequently asked questions
- What is the difference between Goserelin and Nafarelin?
- Goserelin is classified as "Research other", while Nafarelin is classified as "Research other". Goserelin: Goserelin is a synthetic decapeptide and an agonist of gonadotropin-releasing hormone (GnRH). The medical literature describes it as a hormonal agent that suppresses the release of sex hormones through sustained receptor stimulation. Regulatory-approved indications include prostate cancer, advanced breast cancer, endometriosis, and endometrial thinning, among others. Nafarelin: Nafarelin is a GnRH agonist and the only member of this class delivered as a nasal spray. It is approved for treating endometriosis and central precocious puberty. This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Goserelin or Nafarelin?
- The highest available evidence level is "Human RCT" for Goserelin and "Human RCT" for Nafarelin. A higher evidence level means more robust data, but says nothing about suitability for an individual. The full body of evidence is on each peptide's own page.
- What is the legal status of Goserelin and Nafarelin in Germany and the United States?
- Germany: Goserelin — Prescription, Nafarelin — Prescription. United States: Goserelin — Prescription, Nafarelin — Prescription. These are factual summaries with source and review date on the individual pages.