Melanotan II vs PT-141
Both are categorized under Melanocortin in our directory—here is how they differ in name, use, and label context.
Research at a glance
PubMed paper counts, ClinicalTrials.gov listings, and regulatory context—aggregated from public databases.
- Melanotan II — PubMed papers
- 194
- PT-141 — PubMed papers
- 93
- Melanotan II — clinical trials
- 1,329 (3 active/recruiting)
- PT-141 — clinical trials
- 10 (1 active/recruiting)
- Melanotan II — regulatory context
- Research / sport peptide
- PT-141 — regulatory context
- FDA-labeled drug
- More public research
- Melanotan II (PubMed + trials composite)
Melanotan II
Melanocortin
A synthetic melanocortin peptide originally developed for tanning—now notorious for unregulated online sale.
Melanotan II activates melanocortin receptors, increasing skin pigmentation and (as a side effect) libido. It is not FDA-approved; injectable products sold online are unregulated with risks of nausea, mole changes, and u…
PT-141
Melanocortin
A melanocortin receptor agonist approved as Vyleesi for hypoactive sexual desire in women.
PT-141 (bremelanotide) works centrally on melanocortin-4 receptors—not by blood flow like PDE5 drugs. FDA-approved as a nasal spray (Vyleesi). Research-grade PT-141 sold online is not the same as the prescription produ…
Quick comparison
- Melanotan II: Melanocortin — A synthetic melanocortin peptide originally developed for tanning—now notorious for unregulated online sale.…
- PT-141: Melanocortin — A melanocortin receptor agonist approved as Vyleesi for hypoactive sexual desire in women.…
Common questions
What is the difference between Melanotan II and PT-141?
Both are categorized under Melanocortin in our directory—here is how they differ in name, use, and label context. Melanotan II is categorized as Melanocortin; PT-141 as Melanocortin. Melanotan II: A synthetic melanocortin peptide originally developed for tanning—now notorious for unregulated online sale. PT-141: A melanocortin receptor agonist approved as Vyleesi for hypoactive sexual desire in women.
Are Melanotan II and PT-141 the same peptide?
No. They are different molecules with distinct names on labels and in research databases. Always match the full INCI or drug name—not a nickname on the front of the package.
Which is better for performance—Melanotan II or PT-141?
Neither page is medical or anti-doping advice. Research peptides discussed in fitness communities may be prohibited in tested sport or unavailable as OTC supplements. Verify WADA lists and talk to a clinician.