Melanotan II vs Bremelanotide
Two melanocortin-receptor agonists studied for pigmentation and sexual-function endpoints. Here's a neutral, sourced side-by-side — no hype, every claim links to its evidence.
Melanotan II
ResearchAlso: Melanotan-2, MT II
Melanotan II is a synthetic cyclic heptapeptide and non-selective melanocortin receptor agonist (MC1R/MC3R/MC4R/MC5R). MC1R agonism darkens skin (tanning); MC4R effects increase libido and induce erections.
Bremelanotide
ApprovedAlso: PT-141, Vyleesi
Bremelanotide is a man-made copy of a tiny protein-like molecule. It is also known by the code name PT-141.
At a Glance
| Melanotan II | Bremelanotide | |
|---|---|---|
| Research status | Preclinical | Approved |
| Highest-tier evidence | Peer-reviewed study | Peer-reviewed study |
| Research citations | 3 | 15 |
| Dosing routes | — | SubQ |
| Receptor targets | MC1R, MC3R, MC4R, MC5R | MC4R |
| Half-life | — | — |
| Known side effects | 11 | 11 |
Research Areas
Top preclinical research areas — cited studies for each.
Melanotan II
- Skin darkening (cosmetic)
- Increased libido/erectile effects
Bremelanotide
- Improves sexual desire (HSDD)
- As-needed use
How People Use It
Reported routines — research only, not medical advice.
Melanotan II
Not yet documented for Melanotan II — being compiled.
Bremelanotide
- SubQ — Single administration demonstrating effects lasting up to 24 hours
- SubQ — Self-administered injectable medication
- SubQ — 1.75 mg subcutaneous ~45 min before activity
The Evidence
Key studies — click through to verify each on PubMed.
Melanotan II
3 sourced studies
- Source
TGA warning: tanning products containing melanotan
Guideline2023 Key study 70/100Rated 70/100Source typeRegulator or clinical registryIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Melanotan-induced priapism: a hard-earned tan
CaseReport2019 60/100Rated 60/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Convergence of melatonin and serotonin (5-HT) signaling at MT2/5-HT2C receptor heteromers
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Bremelanotide
15 sourced studies
- Source
Bremelanotide for Treatment of Female Hypoactive Sexual Desire
Review2022 Key study 86/100Rated 86/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Vyleesi (bremelanotide) prescribing information
Guideline2019 90/100Rated 90/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
Bremelanotide
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology → - Source
PubChem - Compound - Bremelanotide
95/100Rated 95/100Source typePeer-reviewed studyIndependent sourcesstill being verifiedEvery claim links to the page it came from, and stronger sources rate higher. Full methodology →
Decision Guide
How to Choose
Neither is a “winner” — they suit different goals. Compare the documented benefits and evidence above against what you’re actually trying to achieve, note the research status (approved vs research-stage), and read each full guide before deciding. Many people also stack peptides rather than pick one.
Source Melanotan II
Shop Melanotan IISource Bremelanotide