Decapeptyl · Trelstar · GnRH agonist
GnRH agonist — PCT and hormone axis resetting.
FDA
Approved
WADA
Banned
HALF-LIFE
~2.8 hours (short-acting), ~weeks (depot)
ROUTE
IM injection
SCHEDULE
Single dose (PCT) or monthly (depot)
In Plain English
GnRH agonist — PCT and hormone axis resetting.
Status & Legality
NATTY?
Not NattyWADA banned substance. Tested athletes will fail.
FDA
ApprovedFDA approved for human use.
WADA
BannedOn WADA prohibited list. Use disqualifies in tested sports.
COMPOUNDING
Rx AvailableAvailable at licensed pharmacies with prescription.
PRESCRIBED
By prescriptionPhysicians can prescribe this compound legally.
ROUTE
IM injectionAdministration via im injection.
PCT after anabolic use
Prostate cancer
Precocious puberty
Endometriosis
Triptorelin is a potent GnRH agonist FDA-approved for prostate cancer and precocious puberty. In performance contexts, a single low dose is used for post-cycle therapy (PCT) to trigger a powerful LH surge and restart the HPG axis. It has largely replaced clomid/nolvadex in many advanced PCT protocols.
Temporary testosterone suppression after single dose before recovery
Hot flashes
GI upset
Depression (with chronic use)
Using the depot (monthly) form for PCT — the depot causes prolonged suppression of 3–6 months; only the short-acting form is appropriate for PCT
Timing it incorrectly — start Triptorelin PCT 2 weeks after the last long-ester anabolic compound clears; timing relative to clearance is critical
Not understanding the initial testosterone flare — the first dose triggers a significant LH surge and testosterone spike before the agonist effect kicks in
GnRH antagonists — counterproductive; do not combine
Long-ester testosterone — timing the last injection correctly before PCT is critical for proper clearance
Antiandrogens — sometimes used clinically with the first dose to manage the testosterone flare in prostate cancer; not typically needed in PCT use
Single-dose Triptorelin PCT (100–200 mcg short-acting) has replaced clomid/nolvadex protocols for many advanced users due to its reliable HPG axis restart via the initial LH surge. Critical point: only use the short-acting form. The depot version creates months of testosterone suppression — the exact opposite of what PCT requires.
Stats
Sources & Studies
Triptorelin: a GnRH agonist for advanced prostate cancer and endometriosis
Crawford ED. et al., Expert Opin Pharmacother, 2009