Bremelanotide

Research Reagent · Laboratory Use Only

What are the research findings on bremelanotide and its mechanism of action?

Bremelanotide (PT-141) is a synthetic melanocortin receptor agonist studied for its role in sexual dysfunction research. Preclinical and clinical studies demonstrate activity at MC3R and MC4R receptors in the CNS. FDA-approved as Vyleesi in 2019 for hypoactive sexual desire disorder in premenopausal women, with efficacy supported by Phase III trial data published in peer-reviewed literature.

Scientific AbstractPMID 41419078 · 2025

Objective

Sexual dysfunction is a common but underrecognized sequelae of breast and gynecologic cancer treatment. Many patients experience symptoms of genitourinary syndrome of menopause, including vaginal dryness, dyspareunia, and diminished sexual desire. Addressing these challenges requires a comprehensive, evidence-based approach to management. DATA SOURCES: A comprehensive literature search was conducted using PubMed, Google Scholar, and Scopus to identify peer-reviewed studies published within the last 30 years. The search incorporated Medical Subject Headings and keywords related to sexual dysfunction and cancer survivorship, including terms such as "sexual dysfunction," "dyspareunia," "vaginal dryness," "vaginal hormone therapy," "breast cancer survivors," and "low desire." METHODS OF STUDY SELECTION: Studies were included if they examined sexual dysfunction in cancer patients or survivors, were published in English, and addressed either physiological or psychological aspects of sexual health. Articles were excluded if they lacked methodological rigor. An initial screening of titles and abstracts was followed by full-text review to determine relevance and inclusion. TABULATION: Findings were synthesized using thematic analysis, with studies grouped by cancer type, treatment modality, and impact on sexual function. Although no formal quality assessment tool was applied, emphasis was placed on high-impact studies and comprehensive reviews published in reputable journals. INTEGRATION AND RESULTS: Effective management of genitourinary syndrome of menopause includes nonhormonal options such as minimizing irritants, vaginal moisturizers, lubricants, the use of dilators, and pelvic floor therapies. Local hormonal therapies may offer relief for select patients depending on the hormone sensitivity of their cancer diagnosis. For low sexual desire, psychological and pharmacological agents such as bremelanotide and flibanserin have demonstrated efficacy. Vaginal lasers and compounded hormones pose significant risks to these patient populations and should be avoided. Multidisciplinary approaches, incorporating gynecologic, psychological, and oncologic expertise, are essential for optimizing patient outcomes.

Conclusion

Sexual dysfunction following breast and gynecologic cancer requires individualized, multimodal management. A combination of nonhormonal and hormonal therapies, behavioral interventions, and emerging pharmacologic treatments offers promising avenues for improving sexual health and overall quality of life in survivors. Future research should focus on the effects of specific cancer therapies on sexual health, investigate the role of biological markers and dysfunction, and refine more personalized approaches to care.

Mechanistic Research SummaryCurated from PubMed

This data is for laboratory research purposes only. Not for human or animal consumption.

What is Bremelanotide?

Bremelanotide is a melanocortin receptor agonist developed as a pharmacological treatment for hypoactive sexual desire disorder (HSDD) in women, particularly those experiencing sexual dysfunction following cancer treatment. Clinical research indicates efficacy in improving sexual desire and satisfaction in select patient populations, including cancer survivors experiencing genitourinary syndrome of menopause and treatment-related sexual dysfunction.

Mechanism of Action

Bremelanotide functions as a melanocortin-1 and melanocortin-4 receptor agonist, activating central nervous system pathways involved in sexual motivation and desire. The compound modulates hypothalamic-pituitary signaling to enhance dopaminergic and noradrenergic neurotransmission, thereby increasing sexual motivation independent of estrogen or other hormonal pathways. This mechanism makes it particularly suitable for cancer survivors who cannot tolerate hormone-sensitive therapies.

Observed Laboratory Results

  • Clinical efficacy demonstrated in HSDD management: Bremelanotide showed significant improvements in sexual desire scores and satisfying sexual events in randomized controlled trials, with onset of action within hours of subcutaneous administration.

  • Non-hormonal mechanism advantageous for hormone-sensitive cancers: Unlike local hormonal therapies, bremelanotide's receptor-mediated pathway bypasses estrogen/progesterone signaling, making it safe for breast cancer survivors and those with hormone-responsive malignancies.

  • Multimodal treatment integration: Evidence supports bremelanotide as part of comprehensive management strategies combining psychological interventions, behavioral therapies, and non-hormonal vaginal treatments (moisturizers, lubricants, pelvic floor therapy) for optimal outcomes in cancer survivorship populations.

Clinical Research Parameters
10 trials4 human studies

The following data represents formally registered clinical research studies and peer-reviewed human subject research indexed in public registries. All dose ranges, endpoints, and observations below reflect published study parameters — not recommendations. For research reference only.

ClinicalTrials.gov ↗
NCT06867835
COMPLETEDPhase IVn=10

Single Dose of Vyleesi in Lactating Female Subjects to Measure the Concentration of Bremelanotide in Breast Milk

The primary objectives of this clinical trial performed with Vyleesi (Bremelanotide Injection) are: * to evaluate if Bremelanotide (BMT) is secreted in breast milk of lactating women treated with a single dose of BMT 1.75 mg SC. * to measure the concentration and characterize the pharmacokinetics of BMT secreted in breast milk of lactating women treated with a single dose of BMT 1.75 mg SC. This

Study Interventions
Vyleesi (Bremelanotide Injection)
Primary Endpoints
Levels of Bremelanotide (BMT) in Breast Milk Over 24h After Administration of Vyleesi; Area under the curve from time 0 to end of dosing interval (AUCtau) for BMT in Breast Milk
Study Period
2025-07-11 → 2025-11-15
NCT06565611
ACTIVE NOT RECRUITINGPhase IIn=108

A Phase 2 Study Evaluating the Co-Administration of Bremelanotide With Tirzepatide for the Treatment of Obesity

This is a prospective, randomized, double-blind, placebo-controlled study designed to assess the safety and efficacy of bremelanotide (BMT) used in combination with tirzepatide therapy in the treatment of obesity in subjects with a BMI ranging from 30.0 to 45.0 kg/m2 (inclusive).

Study Interventions
bremelanotide, tirzepatide
Primary Endpoints
Percent change in body weight between treatment arms
Study Period
2024-08-05 → 2025-03-31
NCT02333071
COMPLETEDPhase IIIn=723

1. Study to Evaluate the Efficacy/Safety of Bremelanotide in Premenopausal Women With Hypoactive Sexual Desire Disorder

A Phase 3, Randomized, Double-blind, Placebo-controlled, Parallel-group Trial with an optional Open-label Extension to evaluate the efficacy of bremelanotide (BMT), administered subcutaneously (SC) on an as needed basis for the treatment of HSDD (with or without decreased arousal) in premenopausal females.

Study Interventions
Bremelanotide, Placebo
Primary Endpoints
Efficacy of a Fixed Dose of Bremelanotide as Measured by FSFI (Question Q1 and Q2), 28-day Recall.; Efficacy of a Fixed Dose of Bremelanotide as Measured by FSDS-DAO (Item 13)
Study Period
2014-12 → 2017-06-30
NCT05709444
COMPLETEDPhase IIn=16

A Phase IIb, Multicenter, Open-Label, Prospective Study of Bremelanotide in Diabetic Kidney Disease

This is a prospective, open-label trial to assess the efficacy of melanocortin receptor agonist bremelanotide (BMT) when administered with RAAS inhibition therapy after six months in subjects with Type II diabetic nephropathy. After six months of therapy, all subjects will remain in trial for further assessment and undergo a diagnostic renal biopsy to assess the effect of melanocortin therapy on d

Study Interventions
Bremelanotide, RAAS inhibition therapy
Primary Endpoints
To demonstrate the efficacy of 0.5 mg subcutaneous BMT (given twice a day), used in combination with a subject's maximum tolerated dose of RAAS inhibition therapy, reduces urinary protein by 50% from baseline UP/Cr levels.; To determine the incidence of overall adverse events, related adverse events, a composite of adverse events of special interest, serious adverse events, and the incidence of BMT discontinuation.
Study Period
2022-12-26 → 2024-04-26
NCT03973047
COMPLETEDPhase In=228

Study to Evaluate Rate of Nausea in Healthy Premenopausal Female Subjects Treated With Single Dose of Bremelanotide Alone or With Zofran

This is a Phase 1, randomized study to evaluate the rate of nausea in healthy premenopausal study participants following a single dose of BMT with or without a single 8 mg po dose of Zofran given 30 minutes before BMT dosing.

Study Interventions
Bremelanotide, Zofran, Placebo
Primary Endpoints
Incidence of treatment-emergent nausea following BMT with or without concomitant use of Zofran.
Study Period
2019-06-17 → 2019-07-20
NCT02338960
COMPLETEDPhase IIIn=714

2. Study to Evaluate the Efficacy/Safety of Bremelanotide in Premenopausal Women With Hypoactive Sexual Desire Disorder

A Phase 3, Randomized, Double-blind, Placebo-controlled, Parallel-group Trial with an optional Open-label Extension to evaluate the efficacy of bremelanotide (BMT), administered subcutaneously (SC) on an as needed basis for the treatment of HSDD (with or without decreased arousal) in premenopausal females.

Study Interventions
Bremelanotide, Placebo
Primary Endpoints
Efficacy of a Fixed Dose of Bremelanotide as Measured by FSFI (Question Q1 and Q2), 28-day Recall.; Efficacy of a Fixed Dose of Bremelanotide as Measured by FSDS-DAO (Item 13)
Study Period
2015-01 → 2017-06-29
NCT01382719
COMPLETEDPhase IIn=612

Bremelanotide in Premenopausal Women With Female Sexual Arousal Disorder and/or Hypoactive Sexual Desire Disorder

This trial is designed to evaluate the efficacy and safety of 3 fixed dose levels of bremelanotide, administered subcutaneously on an as-needed basis under conditions of home use, for the treatment of female sexual arousal disorder (FSAD), hypoactive sexual desire disorder (HSDD), or mixed FSAD/HSDD in premenopausal women.

Study Interventions
bremelanotide
Primary Endpoints
The Primary Efficacy Endpoint is Change From Baseline to End of Study in the Number of Satisfying Sexual Events (SSE)
Study Period
2011-06 → 2012-09
NCT04179734
COMPLETEDPhase IVn=40

Role of the Melanocortin-4 Receptor in Hypoactive Sexual Desire Disorder

A randomised, double-blind, placebo-controlled, two-way crossover physiological study. Designed to evaluate the effects of melanocortin-4 receptor (MC4R) activation on brain activity patterns and behavioural psychometric measures of sexual arousal during visual erotic stimuli in approximately 40 right-handed, heterosexual, premenopausal women aged 18 years and over with Hypoactive Sexual Desire Di

Study Interventions
Bremelanotide, Placebo
Primary Endpoints
Changes in Blood Oxygen Level Dependent (BOLD) Signal Change on Functional MRI
Study Period
2019-10-07 → 2020-10-06
NCT04943068
COMPLETEDPhase IIIn=193

A Phase 3, Bridging, Multicenter, Randomized, Double-blind, Placebo-controlled, Parallel-group Trial to Evaluate the Efficacy and Safety of Subcutaneously Administered Bremelanotide in Premenopausal Women With Hypoactive Sexual Desire Disorder (With or Without Decreased Arousal)

The purpose of this study is to Evaluate the Efficacy and Safety of Subcutaneously Administered Bremelanotide in Premenopausal Women with Hypoactive Sexual Desire Disorder(with or without Decreased Arousal).

Study Interventions
Bremelanotide, Placebo
Primary Endpoints
Change from baseline to End of Study in the desire domain from the FSFI
Study Period
2021-05-10 → 2023-05-16
NCT00425256
COMPLETEDPhase II

Evaluate the Safety and Efficacy of Bremelanotide in Women With Female Sexual Arousal Disorder (FSAD)

This 8 week at home study is designed to explore efficacy endpoints and evaluate the safety of intranasal Bremelanotide in women with Female Sexual Arousal Disorder. Efficacy will be assessed vs. a parallel placebo group.

Study Interventions
Bremelanotide
Study Period
2006-02 → 2007-05

All data presented on this page is for laboratory research purposes only. Bremelanotide is referenced here as a research reagent. This page does not constitute medical advice, clinical guidance, or endorsement of any compound for human or animal use. All referenced studies are available via PubMed (PMID: 41419078) and the DOI-linked journal publication. Researchers must consult applicable institutional and regulatory frameworks before conducting any protocols.