Research peptides · Third-party tested
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Synthetic cyclic heptapeptide melanocortin analog, sold for laboratory research.
Identity
PT-141 is bremelanotide, a lab-made peptide trimmed down from Melanotan II so that it acts on one specific melanocortin receptor instead of several. It is worth knowing upfront that in 2019 the FDA approved this molecule as a prescription drug, brand name Vyleesi, for a specific use in premenopausal women. What research suppliers sell as PT-141 is not that approved product, it is the same underlying peptide sold outside that regulatory pathway.
PT-141 is a synthetic cyclic heptapeptide melanocortin analog of 7 amino acid residues. SBz Industries sells it for laboratory research.
Research
In plain terms, with a link to every study. The most useful thing to notice is what each study was done in.
The molecule behind PT-141 went through the full FDA approval process for one specific use. What research suppliers sell is not the approved drug, and none of the approval-trial data applies to how that product is made or sold.
review2019
A drug-development summary tracing bremelanotide from early research through the trials that led to its 2019 FDA approval under the brand name Vyleesi, for a specific use in premenopausal women. This article summarizes the regulatory history rather than reporting a new experiment of its own.
Bremelanotide: First Approval.
Dhillon and colleagues, Drugs
Each study links to its record on PubMed, the US National Library of Medicine database. Checked 25 September 2026.
Handling
Lyophilized: -20C, protected from light. Reconstituted: 2-8C.
Give the vial twenty minutes on the bench before opening it, so water does not condense onto the powder.
Slowly, down the inside wall of the vial, never straight onto the powder.
Leave it alone until it clears. Do not shake it. Shaking damages the peptide.
Once mixed, it breaks down much faster than the dry powder. Keep it cold and dark.
Documentation
An independent lab tests every compound we sell. It confirms the compound is what the label says and measures purity by HPLC.
The latest certificate is on the product page, so you can read the result before you order.
See the certificateRead next
Questions
PT-141 is bremelanotide, a lab-made peptide trimmed down from Melanotan II so that it acts on one specific melanocortin receptor instead of several. It is worth knowing upfront that in 2019 the FDA approved this molecule as a prescription drug, brand name Vyleesi, for a specific use in premenopausal women. What research suppliers sell as PT-141 is not that approved product, it is the same underlying peptide sold outside that regulatory pathway. SBz Industries sells it for laboratory research only.
The underlying molecule, bremelanotide, was approved by the FDA in 2019 under the brand name Vyleesi, for a specific use in premenopausal women. What research suppliers sell as PT-141 is not that approved product.
PT-141 ships as a freeze-dried powder. Mix it with bacteriostatic water, added slowly down the inside wall of the vial, and let it dissolve without shaking. The researcher decides the working concentration, not us, and we publish no protocols.
Lyophilized: -20C, protected from light. Reconstituted: 2-8C. Vials ship in plain outer packaging with no product name on the outside.
Yes. An independent lab tests every compound: it confirms the compound is what the label says and measures purity by HPLC. The latest certificate is on the product page, and you can read it before you order.
Researchers and institutions, 21 or over. By ordering you confirm the material is for laboratory research and will not be used in humans or animals.
Order
Every compound is third-party tested, with the certificate on its product page. Every order ships in plain packaging.