Leuprolide
FDA ApprovedA GnRH agonist and one of the first peptide drugs widely used clinically. Used for prostate cancer, endometriosis, and hormonal regulation research.
Reproductive HealthHormonal Health
Half Life
~3 hours (short-acting)
Time to Results
Weeks
Administration
SubQ injection, Intramuscular, Implant
🐾 Griffin's Research Scorecard
Research Strength
Human Data
Animal Data
Long-Term Data
Beginner Friendly
Storage Difficulty
Injection FrequencyVaries (daily to monthly depot)
Cost$$$
🐾 Griffin Says...
One of the first major peptide drugs. Important for context since it shows how GnRH agonists are used clinically - primarily to suppress hormone production, the opposite of what most research community members are looking for. Important to understand the biphasic effect.
Benefits
- Testosterone suppression (clinical use)
- Hormonal regulation
- Prostate cancer management
- Endometriosis research
Best For
- Hormonal research
- Advanced reproductive research
Body Systems
ReproductiveEndocrine
Mechanisms of Action
- GnRH receptor agonist
- Initial flare followed by testosterone suppression
- Downregulates GnRH receptors
Side Effects
| Effect | Frequency | Severity |
|---|---|---|
| Hot flashes | Very Common | Mild |
| Testosterone suppression | Intended clinical effect | Significant |
| Bone density loss with chronic use | With chronic use | Serious |
Contraindications
Pregnancy, not for general use without clinical indication
Peptides discussed here are for research purposes only. Nothing on this page is medical advice. Always consult a qualified professional before making health decisions.
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