Why does triptorelin cause an initial hormone surge?

As a GnRH agonist it first stimulates the pituitary, producing a flare in LH, FSH, and sex hormones before continuous stimulation desensitizes the receptors and suppresses output.

Is triptorelin reversible?

Yes. Hormone suppression generally reverses after the drug is discontinued, as the pituitary regains responsiveness over time.

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Sexual Health

Longevity & Anti-aging

Clinical

Triptorelin (GnRH)

Also known as: Triptorelin, GnRH Agonist

Triptorelin is a long-acting synthetic GnRH agonist used clinically to suppress sex-hormone production after an initial flare. It is applied in prostate cancer, endometriosis, precocious puberty, and fertility protocols.

Mechanism of Action

Triptorelin is a decapeptide GnRH agonist that initially stimulates pituitary release of LH and FSH, producing a transient hormone flare. With continuous receptor occupancy the gonadotrophs become desensitized and downregulated, sharply reducing LH, FSH, and downstream testosterone or estradiol. This reversible medical castration underlies its use in hormone-dependent cancers and conditions. Depot formulations provide sustained receptor stimulation over weeks to months.

Half-life: Approximately 3 hours for the peptide; depot forms last weeks
Administration Routes: subcutaneous
Research Status: Clinical