Comparison
Gonadorelin vs. Triptorelin
Two peptides side-by-side — identity, evidence base, legal status and known adverse events.
Identity
Category
Research other
Research other
CAS no.
33515-09-2
57773-63-4
Molecular weight
1182.29 g/mol
1311.45 g/mol
Half-life
0.1 h
3 h
Sequence
pGlu-His-Trp-Ser-Tyr-Gly-Leu-Arg-Pro-Gly-NH2pGlu-His-Trp-Ser-Tyr-D-Trp-Leu-Arg-Pro-Gly-NH2Mechanism of action
Gonadorelin
Gonadorelin acts as an agonist at the GnRH receptor on the gonadotroph cells of the pituitary and triggers release of the gonadotropins luteinizing hormone (LH) and follicle-stimulating hormone (FSH). The temporal pattern of receptor exposure is decisive: pulsatile administration mimics the natural hypothalamic secretory rhythm and sustains LH/FSH release, whereas continuous exposure leads to receptor internalisation and desensitisation with subsequent paradoxical suppression of gonadotropins. The latter principle is exploited therapeutically by longer-acting GnRH agonists.
Triptorelin
Triptorelin binds with high affinity to the GnRH receptor in the pituitary. After initial stimulation of LH and FSH secretion (flare phase, about 1-2 weeks), receptor desensitisation follows with consecutive gonadotropin suppression. This results in a reversible chemical castration: in men testosterone, in women oestrogen suppression to the postmenopausal range.
Evidence base
Highest evidence
Human trial
Human RCT
Studies
4
4
of which in humans
4
4
Effects recorded
4
3
Open conflicts
1
0
Documented adverse events
2
3
Legal status
Full entries
Frequently asked questions
- What is the difference between Gonadorelin and Triptorelin?
- Gonadorelin is classified as "Research other", while Triptorelin is classified as "Research other". Gonadorelin: Gonadorelin is the synthetic decapeptide with an amino-acid sequence identical to endogenous gonadotropin-releasing hormone (GnRH/LHRH). Historically approved in several countries for diagnostic testing of pituitary function and for fertility indications (pump systems). A defining feature is the opposite effect of pulsatile versus continuous administration: pulsatile stimulates, continuous leads to receptor desensitisation. Triptorelin: Synthetic decapeptide GnRH agonist with increased affinity over native gonadotropin-releasing hormone. FDA- and EMA-approved since the 1980s for prostate cancer, endometriosis and precocious puberty. This page contrasts both neutrally and source-based — with no usage or dosing recommendation.
- Which peptide is better supported by science, Gonadorelin or Triptorelin?
- The highest available evidence level is "Human trial" for Gonadorelin and "Human RCT" for Triptorelin. 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 Gonadorelin and Triptorelin in Germany and the United States?
- Germany: Gonadorelin — Prescription, Triptorelin — Prescription. United States: Gonadorelin — Prescription, Triptorelin — Prescription. These are factual summaries with source and review date on the individual pages.