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Dosage GuideResearch Reference

Triptorelin Dosage

Research-based dosing protocols, timing guidance, and reconstitution reference for Triptorelin. All information is for educational purposes only.

Quick Answer

Triptorelin is administered via intramuscular or subcutaneous depot injection. Dosage and frequency vary based on the indication and formulation. Common regimens include monthly, 3-month, and 6-month depot injections. Dosing should be determined by a qualified medical professional.

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Table of Contents

Standard Dosage Range

Research dosing range: Varies based on indication and formulation (typically 3.75mg - 22.5mg every 1-6 months)

Educational reference only

These dosage ranges are derived from preclinical research and community protocols. No human clinical dose-ranging trials have established therapeutic doses for most research peptides. Always consult a qualified healthcare provider before starting any peptide protocol.

Dosage by Use Case

Advanced Prostate Cancer

3.75 mg - 22.5 mgEvery 1-6 months (depending on formulation)
Duration

Ongoing, as determined by physician

Intramuscular or subcutaneous depot injection. Aim is to achieve and maintain castrate testosterone levels (<50 ng/dL). Dosage and interval are adjusted based on individual response and disease progression.

Central Precocious Puberty

3.75 mgEvery 4 weeks (28 days)
Duration

Until age-appropriate pubertal development is desired

Intramuscular injection. Dose may be adjusted based on body weight and pubertal staging. Monitoring of LH, FSH, and sex steroid levels is essential.

Endometriosis

3.75 mgEvery 4 weeks (28 days)
Duration

6 months

Intramuscular injection. Typically administered for a maximum of 6 months to avoid long-term bone mineral density loss. May be used adjunctively with hormone replacement therapy (add-back therapy) to mitigate hypoestrogenic side effects.

IVF (Controlled Ovarian Stimulation)

0.1 mg daily or single depot injection (3.75 mg)Daily subcutaneous injections or single depot injection as part of controlled ovarian stimulation protocol
Duration

Varies depending on the specific IVF protocol

Used to prevent premature LH surge. Daily subcutaneous injections are typically initiated in the mid-luteal phase or early follicular phase. A single depot injection may be used for long-acting GnRH agonist protocols.

Gender Affirming Hormone Therapy

3.75 mg - 11.25 mgEvery 1-3 months (depending on formulation)
Duration

Ongoing, as determined by physician

Used to suppress endogenous sex hormones in transgender individuals. Dosage and interval are adjusted based on individual hormone levels and response to therapy.

Timing & Frequency

Administered via intramuscular or subcutaneous depot injection according to the prescribed schedule. Timing is less critical due to the sustained-release nature of the depot formulations.

Cycle Guidance

Triptorelin treatment duration is dependent on the indication. For prostate cancer and gender-affirming hormone therapy, it is often a long-term treatment. For endometriosis, it is typically limited to 6 months. Cycle breaks are not generally applicable to triptorelin due to its mechanism of action as a GnRH agonist depot injection.

Reconstitution Reference

Quick reference for reconstituting Triptorelin. For custom vial sizes and concentrations, use the Reconstitution Calculator.

Common Vial SizeVaries (typically 3.75mg, 11.25mg, or 22.5mg)
BAC Water VolumeFollow manufacturer's instructions, typically 2 mL sterile water for injection
Concentration & DrawVaries depending on the vial size and reconstitution volume. Refer to the product insert for specific concentration details.
StorageStore unreconstituted vials at room temperature (20-25°C). Store reconstituted suspension as directed by the manufacturer.
StabilityConsult the product insert for specific stability information after reconstitution. Use immediately after reconstitution is often recommended.
Use the Reconstitution Calculator → for precise injection volumes based on your exact vial size, water volume, and desired dose.

Frequently Asked Questions

What is the usual dose of triptorelin for prostate cancer?
The dose varies depending on the formulation and the patient's individual needs. Common doses range from 3.75 mg to 22.5 mg administered every 1 to 6 months. Consult with a healthcare provider for personalized dosing instructions.
How long does it take for triptorelin to lower testosterone levels?
Triptorelin typically lowers testosterone levels to castrate levels (below 50 ng/dL) within 2-4 weeks of the initial injection. Regular monitoring of testosterone levels is recommended.
Can triptorelin be used to treat endometriosis?
Yes, triptorelin is used internationally to treat endometriosis. It is typically administered for a maximum of 6 months. Add-back therapy with hormone replacement may be used to manage side effects.
What are the common side effects of triptorelin?
Common side effects include hot flashes, decreased libido, erectile dysfunction, injection site reactions, fatigue, and bone pain. Consult the product insert for a complete list of potential side effects.
How is triptorelin administered?
Triptorelin is administered via intramuscular or subcutaneous depot injection. It should be administered by a healthcare professional. Self-administration is not recommended.

Last updated: 2026-02-19