Triptorelin 5mg


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Triptorelin, a synthetic analogue of gonadotropin-releasing hormone, has been employed in clinical practice to treat advanced prostate cancer, serving as a vital component within a comprehensive androgen deprivation therapy. Functioning in a manner akin to luteinizing hormone releasing hormone, triptorelin effectively hinders the synthesis of testosterone and estrogen through extended, continuous administration.

Notably, in the United Kingdom, triptorelin is utilized to curb testosterone and estrogen production in transgender individuals. Additionally, this peptide has proven valuable in treating hormone-receptor positive breast cancer among premenopausal women.



This PRODUCT IS INTENDED FOR RESEARCH PURPOSES ONLY. Its usage should be limited to in vitro testing and laboratory experimentation. This product is not intended for any other purposes, including but not limited to medical, therapeutic, or diagnostic applications. It must not be used on humans, animals, or any living organisms.

Only licensed and qualified professionals with appropriate expertise should handle and manipulate this product. Any unauthorized use or misuse of this product is strictly prohibited by law. The manufacturer, distributor, and seller of this product do not assume any responsibility for its misuse or any consequences resulting from such behavior. By accessing or using this product, you agree to abide by these terms and conditions and acknowledge the inherent risks associated with its usage.




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What Is Triptorelin (GnRH)?

Triptorelin, an analogue of gonadotropin-releasing hormone, finds clinical utility in the treatment of advanced prostate cancer as a component of comprehensive androgen deprivation therapy. Similar in action to luteinizing hormone-releasing hormone, triptorelin effectively inhibits testosterone and estrogen synthesis when administered continuously over an extended period. In the UK, triptorelin is employed to suppress testosterone and estrogen synthesis in transgender individuals. Additionally, this peptide has demonstrated its relevance in managing hormone-receptor positive breast cancer among premenopausal women.

Triptorelin Structure

triptorelin structureSource: PubChemSequence: Pyr-His-Trp-Ser-Tyr-D-Trp-Leu-Arg-Pro-Gly
Molecular Formula: C64H82N18O13
Molecular Weight: 1311.473 g/mol
PubChem CID: 25074470
CAS Number: 57773-63-4
Synonyms: Decapeptyl, TRP(6)-LHRH, Trelstar, Triptoreline, Decapeptyl, Gonapeptyl

Triptorelin Restores Testosterone Secretion in Some Men

The effects of triptorelin can be significantly influenced by its usage regimen. Studies have indicated that triptorelin initially leads to an increase in testosterone levels during prolonged treatment, and its suppressive impact on production becomes evident only after prolonged exposure to the peptide. This phenomenon, known as testosterone flare, is observed in the initial weeks of triptorelin therapy. Consequently, this suggests that triptorelin could potentially serve as a method to elevate testosterone levels in certain individuals if administered with precise timing and appropriate dosing.

Triptorelin Administration Determines Effects

Triptorelin, an analogue of gonadotropin releasing hormone (GnRH), can act as a stimulant for the anterior pituitary gland, promoting the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH). When administered in a pulsatile manner, triptorelin follows this precise mechanism.

The specific levels of FSH and LH produced are contingent upon the size and frequency of GnRH pulses, which are mirrored in the size and frequency of triptorelin doses. However, if triptorelin is administered continuously in a steady-state format, it ultimately leads to the suppression of LH and FSH secretion, as well as the reduction in testosterone and estrogen production. The mode of triptorelin administration in research settings determines its resultant properties.

The predominant focus of triptorelin research has been on its extended, long-term use for suppressing the production of sex hormones, particularly in the field of oncology, where the role of sex hormones in cancer progression is examined. More recently, there has been emerging interest in exploring the potential of triptorelin to restore sexual function, fertility, and testosterone levels. However, this aspect of research is still in its nascent stages.

Triptorelin Research and Breast Cancer

A cornerstone of modern breast cancer treatment is the utilization of hormone suppression to target hormone-sensitive cancers. At present, tamoxifen stands as the most prevalent medication in this category. As a selective estrogen receptor modulator (SERM), tamoxifen is employed for both cancer treatment and prevention in specific patient groups.

It significantly reduces the risk of breast cancer recurrence by approximately 40-50% in postmenopausal women and 30-50% in premenopausal women. Additionally, tamoxifen has been utilized to shrink tumors before surgery.

Although tamoxifen is a remarkable option, it does come with side effects, and tumor resistance can develop over time. The quest for alternatives and supplementary treatments to tamoxifen has driven scientists to explore the potential of triptorelin in breast cancer.

Recent results from a phase 3 clinical trial have unveiled that when used in conjunction with zoledronic acid or letrozole, triptorelin surpasses tamoxifen in reducing disease-free 5-year survival rates in premenopausal women. Similar investigations have demonstrated that the addition of triptorelin to tamoxifen for early-stage breast cancer treatment enhances disease control and increases survival, particularly for high-risk patients who have already undergone chemotherapy. The capacity to enhance effectiveness and extend the benefits of hormone therapy in breast cancer treatment has propelled this field of triptorelin research into the spotlight.

Triptorelin Is a Mainstay of Prostate Cancer Treatment

Triptorelin finds its primary application in the treatment of prostate cancer, working to impede growth by lowering testosterone levels. In the context of hormone-sensitive prostate cancer, the use of triptorelin has resulted in a remarkable reduction in the 10-year mortality rate, bringing it down to less than 5%.

Additionally, it decreases the necessity for surgical intervention, granting most men the opportunity to lead the rest of their lives despite a prostate cancer diagnosis. Nonetheless, there’s a drive to expand the benefits of triptorelin by combining it with other treatment modalities.

Emerging research suggests that when triptorelin is combined with radiation therapy, it can deliver similar advantages to total androgen blockade]. Although this might appear minor, total androgen blockade is often accompanied by side effects that many men find challenging to tolerate. By reducing side effects while maintaining efficacy, even if the difference is subtle, the overall quality of life and adherence to treatment can be enhanced.

Further studies indicate that triptorelin can alleviate lower urinary tract symptoms in men with prostate cancer, significantly reducing the occurrence of severe symptoms from nearly 54% to 12% per week. Similar trial outcomes from various locations, including China, Belgium, and South Korea, have confirmed these findings. This suggests that triptorelin may also prove valuable in the treatment of benign prostatic hyperplasia and other conditions affecting urinary function in men. At the very least, triptorelin effectively alleviates one of the most distressing and life-altering symptoms associated with prostate cancer.

Triptorelin Protects Fertility

Chemotherapy, especially when given to younger individuals, often leads to a distressing side effect: loss of fertility. A small clinical trial investigating the use of triptorelin in young women undergoing chemotherapy has uncovered promising results, demonstrating that the peptide can effectively preserve fertility in a significant proportion of patients. In a similar vein, other research has shown that triptorelin usage can decrease the occurrence of early menopause in individuals who have undergone chemotherapy by roughly 17%.

Triptorelin’s fertility-preserving benefits extend to a diverse range of patients beyond those undergoing chemotherapy. Studies involving women with adenomyosis indicate that triptorelin therapy can boost rates of spontaneous pregnancy and enhance outcomes related to this disease

. Comparable advantages have also been observed in women with endometriosis.

Triptorelin Is Not Associated with Alzheimer’s Disease

One of the identified risk factors for Alzheimer’s disease (AD) is being female. Research has suggested that testosterone plays a protective role against the onset of this disease, whereas estrogen and progesterone may increase the risk of developing AD. This led to concerns that undergoing androgen deprivation therapy might elevate the risk of AD in men, and initial data seemed to align with this hypothesis. However, subsequent research has indicated that the early studies oversimplified the issue, and it’s likely that androgen deprivation itself is not the primary causal factor.

In fact, a comprehensive analysis of the FDA’s MedWatch adverse event data reporting system does not support the notion that triptorelin plays a significant role in AD or cognitive dysfunction. Scientists are now speculating that the side effects associated with prostate cancer, especially the impact of the diagnosis on mood and behavior, might have a more significant connection with the development of AD than androgen deprivation therapy. While a definitive conclusion has not been reached, the evidence is starting to shift away from androgen deprivation therapy as the sole contributor towards other potential factors.

Triptorelin Research and Endometriosis

Research indicates that triptorelin provides significant benefits in alleviating pain associated with endometriosis by reducing the volume of nodules characteristic of this disease. This observation has led to the consideration of triptorelin as a potential pre-surgical treatment, aimed at mitigating bleeding and other complications commonly encountered in endometriosis surgery. Initial findings suggest that triptorelin can enhance the outcomes of laparoscopic surgery for endometriosis, particularly in terms of boosting pregnancy rates post-surgery.

Triptorelin’s effects have been particularly profound in women with colorectal endometriosis, with pain reduction reported in nearly 80% of patients and a decrease in diarrhea symptoms in nearly 60%. While the trial duration was limited to three months, extending the triptorelin therapy period may further improve these outcomes. While not curative, triptorelin significantly enhances the management of endometriosis. The ongoing hope is that further research on this peptide may uncover pathways toward a permanent cure for endometriosis.

Triptorelin Research and Immune Function

Studies conducted in rats have revealed that LHRH (Luteinizing Hormone-Releasing Hormone) directly influences the thymus, a vital component of the immune system. The natural process of aging results in a decline of LHRH agonist binding sites on the thymus, leading to a significant 50% reduction in thymic mass over time. This reduction in thymic mass contributes to age-related immune dysfunction, rendering individuals more susceptible to illnesses such as colds and the flu.

Administration of an LHRH agonist, such as triptorelin, has demonstrated the ability to enhance thymic cell proliferation and partially reverse the impacts of aging on the thymus, thereby improving immune system function to some degree. There’s a notion that supplementing with triptorelin could potentially mitigate age-related alterations in thymic mass, ultimately enhancing immune system performance. This peptide may have utility both as a therapeutic intervention and as a preventive measure.

It’s essential to note that Triptorelin has moderate side effects, low oral bioavailability, and excellent subcutaneous bioavailability in mice. Dosage per kilogram in mice does not directly translate to humans. Triptorelin available for purchase at Peptide Shop is intended exclusively for educational and scientific research purposes, and it is not intended for human consumption. Individuals should only obtain Triptorelin if they possess the appropriate research licensing.

Article Autho

The above literature was researched, edited and organized by Dr. Logan, M.D. Dr. Logan holds a doctorate degree from Case Western Reserve University School of Medicine and a B.S. in molecular biology.

Scientific Journal Author

Prof. Dr. Axel S. Merseburger is the chairman of the Department of Urology, Campus Lübeck, University Hospital Schleswig-Holstein, Germany. Professor Merseburger obtained his medical degree from Hannover Medical School in 2002 after a one-year academic research programme in Washington DC, USA, where he completed his MD thesis. In 2008, he accepted a staff position in Hannover and was promoted to associate professor in 2009; he obtained full professorship in 2012.

Professor Merseburger is board certified in urology and is a member of numerous national and international urological and oncological associations. In addition to serving as a reviewer and member of the editorial board of many journals, Professor Merseburger is the associate editor of the World Journal of Urology and Editor-in-Chief of the “Advanced Prostate Cancer Resource Centre”. Part of his studies pertained to the examination of Triptorelin’s ability to induce androgen deprivation in order to treat prostate cancer.

Furthermore, he is a member of the European Association of Urology (EAU) Guideline Groups on Renal Cell Cancer. He serves as national and international principal investigator in several phase II/III clinical trials. Professor Merseburger has won multiple awards, stipends and prizes for his molecular and clinical research and has authored and co-authored more that 200 publications.

Dr. Axel S. Merseburger is being referenced as one of the leading scientists involved in the research and development of Triptorelin. In no way is this doctor/scientist endorsing or advocating the purchase, sale, or use of this product for any reason. There is no affiliation or relationship, implied or otherwise, between Peptide Shop and this doctor. The purpose of citing the doctor is to acknowledge, recognize, and credit the exhaustive research and development efforts conducted by the scientists studying this peptide.


The products offered on this website are furnished for in-vitro studies only. In-vitro studies (Latin: in glass) are performed outside of the body.  These products are not medicines or drugs and have not been approved by the FDA to prevent, treat or cure any medical condition, ailment or disease.  Bodily introduction of any kind into humans or animals is strictly forbidden by law.

Additional info

Weight4 g
Dimensions10 × 10 × 20 mm

5mg, 10mg

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