What is PT-141 Peptide?


What is PT-141 Peptide?

PT-141, also known as bremelanotide, is a synthetic melanocortin receptor agonist developed as a potential therapy for hypoactive sexual desire disorder. It was first described in the literature in 2003.

PT-141 is available in lyophilized powder form and sold in 10 mg vials.

At Loti Labs, we pride ourselves on stocking high-quality research chemicals. Buy PT-141 for sale for research purposes only and not for human consumption.

WHAT IS PT-141 ?

PT-141 is a synthetic seven amino acid peptide investigated as a possible therapeutic substance for sexual dysfunction in premenopausal animal models. 

While researching the effects of PT-141 in male rats and non-human primates, scientists noted penile erections. The results suggest that PT-141 is a potential new treatment for sexual dysfunction.


Molecular Formula: C50H68N14O10

Molecular weight: 1025.2 g/mol

CAS number: 189691-06-3

IUPAC name: (3S,6S,9R,12S,15S,23S)-15-[[(2S)-2-acetamidohexanoyl]amino]-9-benzyl-6-[3-(diaminomethylideneamino)propyl]-12-(1H-imidazol-5-ylmethyl)-3-(1H-indol-3-ylmethyl)-2,5,8,11,14,17-hexaoxo-1,4,7,10,13,18-hexazacyclotricosane-23-carboxylic acid


PT-141 is an agonist of many melanocortin receptors, which in order of potency are MC1R, MC4R, MC3R, MC5R, and MC2R. The mechanism by which PT-141 improves hypoactive sexual desire disorder is currently unknown.

One theory is that PT-141 stimulates dopamine in the medial preoptic area, which is involved in the sexual behavior of several organisms.

PT-141 Peptide EFFECTS

The theoretical benefits of PT-141 on animal test subjects show that it:

  • May cause longer-lasting erections
  • May improve sexual performance
  • May promote bladder control and strengthen pelvic floor muscles
  • Burning fat and calories
  • Lowering blood pressure
  • Reducing stress levels


Some of its theoretical side effects are:

  • Flushing
  • Headaches
  • Nausea and vomiting
  • Irritation at the injection site
  • Cough
  • Fatigue
  • Paresthesia
  • Dizziness
  • Nasal congestion
  • Discoloration of the skin


When searching for research peptides online, it is paramount to buy from a trusted laboratory to ensure the integrity of your research. 

Loti Labs offers affordable prices that come with quality control reports. We have in-depth customer support and a generous return policy when you buy PT-141 for sale. 

Visit our website or contact us today to buy PT-141 online.


  1. Clayton AH, Lucas J, DeRogatis LR, Jordan R. Phase I randomized placebo-controlled, double-blind study of the safety and tolerability of bremelanotide coadministered with ethanol in healthy male and female participants. Clin Ther. 2017;39:514–526.e14. [PubMed]
  1. Bremelanotide (Vyleesi) for hypoactive sexual desire disorder. Med Lett Drugs Ther. 2019;61(1577):114–6. [PubMed]
  1. Dhillon S, Keam SJ. Bremelanotide: First Approval. Drugs. 2019;79:1599–606. [PubMed]
  1. Kingsberg SA, Clayton AH, Portman D, Williams LA, Krop J, Jordan R, Lucas J, et al. Bremelanotide for treating hypoactive sexual desire disorder: two randomized phase 3 trials. Obstet Gynecol. 2019;134:899–908. [PMC free article] [PubMed]
  1. Simon JA, Kingsberg SA, Portman D, Williams LA, Krop J, Jordan R, Lucas J, et al. Long-term safety and efficacy of bremelanotide for hypoactive sexual desire disorder. Obstet Gynecol. 2019;134:909–17. [PMC free article] [PubMed]

Share this post