Index/BuserelinHormonal Regulation

BUSERELIN

Suprefact · GnRH agonist (buserelin)

GnRH agonist — prostate cancer and sex hormone modulation.

FDA

Approved

WADA

Banned

HALF-LIFE

~1.2 hours

ROUTE

Intranasal, SubQ injection, or implant

SCHEDULE

3× daily intranasal or monthly implant

In Plain English

GnRH agonist — prostate cancer and sex hormone modulation.

Status & Legality

NATTY?

Not Natty

WADA banned substance. Tested athletes will fail.

FDA

Approved

FDA approved for human use.

WADA

Banned

On WADA prohibited list. Use disqualifies in tested sports.

COMPOUNDING

Rx Available

Available at licensed pharmacies with prescription.

PRESCRIBED

By prescription

Physicians can prescribe this compound legally.

ROUTE

Intranasal, SubQ injection, or implant

Administration via intranasal, subq injection, or implant.

Who It's For

Prostate cancer

Endometriosis

Testosterone suppression

IVF protocols

How It Works

Buserelin is a potent GnRH agonist approved for prostate cancer and endometriosis. Like leuprolide and triptorelin, chronic use causes pituitary desensitization and profound sex hormone suppression. Unique among GnRH agonists for its intranasal formulation, making it practical for clinical use without injections.

Side Effects

01

Hot flashes

02

Bone density loss (long-term)

03

Sexual dysfunction

04

Depression

05

Initial testosterone flare

Common Mistakes

Confusing intranasal Buserelin's low bioavailability (~3%) with injectable forms — intranasal requires much higher doses than subcutaneous injection to achieve equivalent effects

Not managing the initial testosterone flare in prostate cancer — the first week causes a temporary testosterone rise before suppression begins; concurrent antiandrogen is often needed

Using as a research compound without understanding it causes testosterone suppression — the hormonal effect is profound and not reversible quickly after depot doses

Drug & Supplement Interactions

Antiandrogens (bicalutamide, flutamide) — used clinically during initial testosterone flare management in prostate cancer

Bone-density medications — often co-prescribed for long-term use; androgen deprivation causes significant bone loss

Antidiabetics — androgen deprivation worsens insulin resistance; adjust diabetes management accordingly

The PepVault Take

Buserelin is a medical compound for hormone-sensitive conditions — primarily prostate cancer, endometriosis, and IVF protocols. Its intranasal availability is clinically convenient for daily dosing, but the 3% bioavailability means doses are very different from injectable forms. Any use outside supervised medical care requires extreme caution.

Frequently Asked Questions

Stats

ONSET50
DOCUMENTATION92
SIDE INTENSITY60
CYCLE EASE70
POPULARITY25
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Sources & Studies

1/2

Buserelin (HOE 766), a potent GnRH analog: clinical applications in prostate cancer

Peeling WB. et al., J Urol, 1985

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Research Use OnlyNot Medical AdviceNot FDA Evaluated18+ OnlyWADA Status Tracked

PepVault provides educational and research reference information only. Nothing on this site constitutes medical advice, diagnosis, or treatment. Content has not been evaluated by the U.S. Food and Drug Administration. No compound listed on this site is intended to diagnose, treat, cure, or prevent any disease or medical condition. The legality of peptide compounds varies by jurisdiction — you are solely responsible for compliance with the laws of your country or region. Certain compounds listed are prohibited under the World Anti-Doping Agency (WADA) Prohibited List; athletes subject to anti-doping regulations should independently verify status before use. This site is intended for adults 18 years of age or older. Always consult a licensed healthcare provider before using any compound.

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