Gonadorelin (GnRH)
Gonadorelin acetate, Gonadorelin hydrochloride, LHRH, LH-RH, Factrel, Lutrepulse, Lutrelef
A synthetic copy of GnRH, the brain hormone that makes the pituitary release LH and FSH. Its effect depends on the pattern: pulses stimulate, constant exposure dampens the axis.
Legal status: Prescription medicine where licensed for people; current US labels are veterinary. Banned in sport for men at all times (WADA S2.2.1).
What it gives
What people use it for and what the sources report. Strength is a general category from the literature: mild, clear or strong.
Purpose
Used by men on testosterone or steroids as an alternative to hCG, to keep LH, FSH and the testes working, and misused by athletes to raise testosterone. Medically, given by pulse pump for hypogonadotropic hypogonadism in some countries.
What people seek and what studies show
People hope to keep their own LH and testes working. In 28 men with congenital hypogonadotropic hypogonadism (not randomized), a pulse pump started sperm production in 90%, earlier than hCG plus hMG (median 6 vs 14 months). In monkeys, constant delivery desensitized the pituitary. No trial has tested it alongside testosterone or after steroids.
Effects
Evidence: Approved medicine — studied in people for its medical use
Possible side effects
Possible does not mean certain: whether they appear depends on dose, duration, individual response and monitoring. Below — what to watch for and how to notice it early.
3 possible side effects
level · how often it is reportedWhat the levels mean
Level: general category from the literature, not your personal risk
How often
- common
- reported often
- possible
- reported in some people
- rare
- reported occasionally
How to lower the risks
For 1 of 3 possible side effects there are specific ways to lower the chance: everyday measures, supplements and options a doctor may consider. For the rest — general advice. No measure removes a risk completely.
Products obtained without a prescription are often fake, mislabeled or non-sterile, and there is no way to check at home. For legal supplements, look for third-party testing (Informed Sport, NSF).
Low-level side effects
How each option helps (2)
- Regular blood tests — LH, FSH and testosterone show how deep suppression is and whether natural production has recovered afterwards.
- Working with a doctor — Assesses how deep suppression is and guides recovery afterwards, including fertility testing.
Check-ups and blood tests
Which tests and check-ups to do and when. This is a guide — agree the exact schedule with your doctor.
Which doctors can help
For women
In women, pulsed GnRH acts on the ovarian axis and has been used to induce ovulation; effects outside medical care are unpredictable.
Myth & fact
“Gonadorelin is just a cheaper hCG.”
hCG acts on the testes directly; gonadorelin acts on the pituitary, and its effect depends on how it is delivered. It has not been tested alongside testosterone.
Combinations
No specific combination notes for this substance yet. The stack check still adds up side effects that several substances share.
Sources
Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.
Open the stack check