Skip to content

Sexual and reproductive health

Triptorelin

Also called Decapeptyl, Trelstar

InjectableEvidence AOnce a week
Half-life
3hours
Typical vial
2 / 5mg
Research amounts
0.1–3.75mg

per administration

Common schedule
Once a week
Tested in people

A human trial worked out how much to take and how often, so a dosing schedule is shown.

Licensed as a medicine in the US and EU.

Work out your draw

These numbers are a starting point — change any of them.

3 mL cartridge · 300 units loaded15units dialled
Concentration
0.67mg/mL
Volume per draw
0.15mL
Units to dial
15
Doses per cartridge
20

Vial label

Copy this into your label printer.

Published research contexts for Triptorelin describe 0.13.75 mg per administration. Descriptive only, not a recommendation.

About 3 hours for the immediate-release peptide; the licensed depot releases over weeks to months, with entirely different kinetics.

A gonadotropin-releasing hormone agonist, licensed as a medicine and usually given as a slow-release depot (for example 3.75 mg monthly) rather than on a daily subcutaneous schedule, so no schedule table is shown.

Modelled level — once a week

1× is the peak after a single dose.

Steady-state peak
1.00× single dose

Read off the modelled curve, not an even-interval formula

Time to steady state
15hours

About five half-lives

Administrations
1/ week

Where these numbers come from

  • Triptorelin (Decapeptyl / Trelstar) product literatureA licensed GnRH agonist supplied mainly as a long-acting depot; the depot's release profile is not a subcutaneous dosing schedule.

Next steps

Others in sexual and reproductive health