Peplens

Gonadorelin (GnRH)

FDA-approved

Synthetic decapeptide identical to native gonadotropin-releasing hormone (GnRH); GnRH receptor agonist · Also known as GnRH, LHRH, gonadotropin-releasing hormone, Factrel, Lutrepulse

Overview

Gonadorelin is a synthetic decapeptide structurally identical to natural gonadotropin-releasing hormone (GnRH/LHRH). Acting on pituitary GnRH receptors, pulsatile gonadorelin stimulates the anterior pituitary to release luteinizing hormone (LH) and follicle-stimulating hormone (FSH). It has a genuine FDA-approval history: the human product Factrel was approved for diagnostic evaluation of pituitary gonadotropic (LH-reserve) function — helping distinguish pituitary from hypothalamic causes of hypogonadotropic states — and a pulsatile form (Lutrepulse) was used to induce ovulation. However, the branded human products were discontinued in the US for commercial reasons, so no FDA-approved human gonadorelin product is currently marketed; what is sold today is largely compounded and not FDA-approved. Its action is mechanistically well established, but modern popular 'fertility/testosterone support' marketing outpaces current approved availability.

Commonly Reported Uses

These are uses commonly discussed or marketed by users and vendors — not a list of proven or approved benefits, and not a recommendation.

  • Diagnostic evaluation of pituitary LH/gonadotropin reserve (this was the FDA-approved Factrel use — now not marketed)
  • Induction of ovulation via pulsatile delivery (historical approved Lutrepulse use)
  • Stimulating endogenous LH/FSH / 'testosterone or fertility support' — marketed claim for compounded use, not an approved product today

What to Track

Data points you and your clinician might monitor. For observation only — not a diagnostic protocol.

  • Labs — LH and FSH (the direct, mechanistically expected pituitary response)
  • Labs — testosterone (men) or estradiol (women) as downstream readouts if a clinician is monitoring
  • Subjective — daily check-ins on libido and energy (downstream of sex-steroid changes)
  • Subjective — injection-site reactions and tolerability

Sources & References

  1. [1]Factrel (gonadorelin) human drug information — RxList
  2. [2]FACTREL (gonadorelin hydrochloride) label — DailyMed (NIH)
  3. [3]Gonadorelin / GnRH stimulation and hypogonadism — PubMed

Quick Reference

Class
Synthetic decapeptide identical to native gonadotropin-releasing hormone (GnRH); GnRH receptor agonist
Evidence Level
FDA-approved
Reported Uses
3 listed
Tracking Metrics
4 suggested
Citations
3 sources

Safety & legal notes

Has an FDA-approval history for human diagnostic use (Factrel) and pulsatile ovulation induction (Lutrepulse), but those branded human products were discontinued in the US for commercial reasons — so no FDA-approved human gonadorelin product is currently on the US market, and material sold today is typically compounded and NOT FDA-approved. (A separate FDA-approved veterinary gonadorelin product exists for cattle reproduction — not for human use.) Because it manipulates the reproductive/hormonal axis, athletes should verify current WADA/governing-body rules. Compounded products carry additional quality/sourcing risk. Consult a licensed clinician.

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