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Leuprolide

Leuprorelin, Lupron, Eligard, Prostap

Research useEducational entry
Mechanism

A synthetic nonapeptide GnRH (gonadotropin-releasing hormone) agonist. Continuous exposure first stimulates the pituitary (an initial 'flare' of LH/FSH and a testosterone/estrogen surge over ~5-12 days), then down-regulates GnRH receptors, producing sustained suppression of sex hormones (reversible medical castration).

Evidence

Well-established prescription drug with decades of clinical data. Approved by the FDA in 1989; a first-line hormonal therapy in several conditions.

Applications
  • Advanced prostate cancer (androgen deprivation)
  • Endometriosis and uterine fibroids
  • Central precocious puberty
  • Adjunct in assisted-reproduction protocols
Protocol

Educational overview only — no dosing instructions in the public hub. Prescription drug administered under specialist supervision.

Risks

Initial tumour 'flare' can transiently worsen symptoms (bone pain, urinary obstruction); hypogonadism effects — hot flushes, reduced bone density, sexual dysfunction, mood changes, metabolic and cardiovascular considerations. Prescription-only; use requires medical oversight.

Quality

A regulated pharmaceutical product should be obtained only through licensed pharmacies with a valid prescription; batch/label integrity and cold-chain matter.

Legal status

Approved prescription medicine (Rx) in the US, EU and most jurisdictions; not a research-use-only compound and not available over the counter.

✓ Last reviewed · 2026-07-21

Frequently asked questions

What is Leuprolide used for?
Advanced prostate cancer (androgen deprivation). Endometriosis and uterine fibroids. Central precocious puberty. Adjunct in assisted-reproduction protocols. Well-established prescription drug with decades of clinical data. Approved by the FDA in 1989; a first-line hormonal therapy in several conditions.
Is Leuprolide legal in Europe?
Approved prescription medicine (Rx) in the US, EU and most jurisdictions; not a research-use-only compound and not available over the counter.
What are the risks and side effects of Leuprolide?
Initial tumour 'flare' can transiently worsen symptoms (bone pain, urinary obstruction); hypogonadism effects — hot flushes, reduced bone density, sexual dysfunction, mood changes, metabolic and cardiovascular considerations. Prescription-only; use requires medical oversight.
How is the quality of Leuprolide assessed?
A regulated pharmaceutical product should be obtained only through licensed pharmacies with a valid prescription; batch/label integrity and cold-chain matter.