Research Use Only (RUO). This article is for education and shares what published science says about a research compound. It is not medical advice, and nothing here is a suggestion to use any peptide on people or animals.

If you have seen the name PT-141 in a research catalog and wondered what it is, this simple guide explains the basics. PT-141 is the research name for a peptide also called bremelanotide. Scientists study it because it acts on a part of the body's signaling system called the melanocortin system. Dissolv Labs supplies PT-141 strictly as a Research Use Only (RUO) reference material. It is not a medicine, a supplement, or a product for people or animals to use.

PT-141: what is it?

PT-141 is a small, lab-made peptide. A peptide is a short chain of amino acids, which are the building blocks that also make up proteins. PT-141 is another name for a compound called bremelanotide. Researchers describe it as a melanocortin receptor agonist. A melanocortin receptor is a tiny docking spot on the surface of certain cells; when a matching molecule attaches to it, the cell receives a signal. An agonist is simply a molecule that switches such a receptor on. So PT-141 is studied because it can attach to melanocortin receptors and activate them in laboratory experiments.

PT-141: where does it come from?

PT-141 grew out of earlier research on a related peptide called Melanotan II. Scientists originally studied Melanotan II because it interacts with the melanocortin system, the same family of receptors that helps control skin pigment and other body signals. During this research, investigators noticed that these melanocortin peptides had effects beyond pigment, which pointed them toward new compounds to study. PT-141 (bremelanotide) came from that line of work. Because both compounds act on melanocortin receptors, they are often discussed together, even though they are different molecules that scientists study for different reasons.

PT-141: what does the research say?

Published research on PT-141 has focused on sexual-function science. Here is what named sources have reported, described plainly and without any promise of benefit.

In a 2003 paper in the Annals of the New York Academy of Sciences, Molinoff and colleagues described PT-141 as a synthetic peptide that acts as an agonist at melanocortin receptors, and reviewed early studies of its effects. This is one of the papers that introduced PT-141 to the wider research community.

Later, bremelanotide was studied in large clinical trials. In a 2019 report in Obstetrics and Gynecology, Kingsberg and colleagues described two randomized, placebo-controlled Phase 3 trials, known as the RECONNECT studies, in premenopausal women with hypoactive sexual desire disorder. The authors reported that, compared with placebo, the studied treatment improved measures of sexual desire and related distress, and they noted common side effects such as nausea, flushing, and headache. These findings belong to those clinical studies and describe what the researchers observed; they are not claims about Dissolv Labs material.

PT-141: is it FDA approved?

This is an important point to state clearly. Bremelanotide is the active ingredient in an FDA-approved prescription medicine sold under a brand name (Vyleesi). According to the FDA prescribing information, that medicine was approved in 2019 for one specific use: treating hypoactive sexual desire disorder in certain premenopausal women. That approval applies only to the finished prescription drug, prescribed by a licensed clinician.

The PT-141 that Dissolv Labs supplies is a Research Use Only reference material. It is not the approved medicine, it is not for human or animal use, and it is not intended to diagnose, treat, cure, or prevent anything. It exists so that qualified researchers can study the compound in the laboratory.

PT-141: how researchers store and handle it

As with many peptides, PT-141 is typically supplied as a dry powder for laboratory reference. General laboratory practice for research peptides is to keep the sealed material cold, away from light, and protected from moisture, following the documentation that accompanies the specific product and the researcher's own institutional protocols. This page does not provide any preparation or use instructions, because the material is not for use in people or animals. Handling should always follow accepted laboratory safety standards and applicable rules.

PT-141 vs Melanotan II

PT-141 and Melanotan II are relatives, not twins. Both are lab-made peptides that act on the melanocortin system, and PT-141 research grew out of earlier Melanotan II work. Melanotan II is most often studied in connection with the melanocortin receptors linked to skin pigment, while PT-141 (bremelanotide) has mainly been studied in sexual-function research and, unlike Melanotan II, became the active ingredient in an approved prescription medicine. In short, they share a family and a mechanism (melanocortin receptor activation) but have different research histories.

PT-141 research materials at Dissolv Labs

Dissolv Labs offers the following Research Use Only reference materials. These are for laboratory research only and are not for human or animal use:

• PT-141 10mg - the melanocortin research peptide described on this page.
• Bacteriostatic Water 3ml - a common laboratory reference liquid.
• Melanotan II 10mg - the related melanocortin peptide discussed above.

Frequently asked questions

Is PT-141 the same as bremelanotide?

Yes. PT-141 is the research name for the peptide bremelanotide. They refer to the same compound.

Can I use PT-141 from Dissolv Labs?

No. Dissolv Labs supplies PT-141 as a Research Use Only reference material. It is not for human or animal use and is intended only for qualified laboratory research.

Is PT-141 a melanocortin receptor agonist?

Yes. Named sources, including Molinoff and colleagues (2003) and the FDA prescribing information for bremelanotide, describe it as a melanocortin receptor agonist, meaning it can switch these receptors on.

The bottom line

PT-141, also known as bremelanotide, is a lab-made melanocortin receptor agonist peptide that grew out of Melanotan II research. Named studies have reported on its role in sexual-function science, and bremelanotide is the active ingredient in an FDA-approved prescription medicine for one specific approved use. The PT-141 that Dissolv Labs supplies is a Research Use Only reference material - not that medicine, not a supplement, and not for human or animal use. Always rely on named, published sources and follow proper laboratory practice.

Sources

• Molinoff PB, et al. PT-141: a melanocortin agonist for the treatment of sexual dysfunction. Ann N Y Acad Sci. 2003 (PubMed).
• Kingsberg SA, et al. Bremelanotide for the Treatment of Hypoactive Sexual Desire Disorder: Two Randomized Phase 3 Trials. Obstet Gynecol. 2019 (PubMed).
• U.S. FDA. VYLEESI (bremelanotide injection) Prescribing Information, 2019 (FDA.gov).

Disclaimer: All Dissolv Labs products are sold for Research Use Only and are not for human or veterinary use. This content is educational and is not medical advice, diagnosis, treatment guidance, or a recommendation to consume any substance.