PT-141 vs Melanotan II
Medically reviewed by the Rite Aid Health Team · Last updated July 2, 2026
PT-141 and Melanotan II get grouped together because both touch melanocortin pathways, but the practical uses are very different. PT-141 is used for sexual desire; Melanotan II is an unapproved tanning peptide with bigger safety concerns.
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At a glance
| PT-141 | Melanotan II | |
|---|---|---|
| Target | Melanocortin (MC4R) | Melanocortin (MC1R-heavy) |
| Used for | Low sexual desire | Skin tanning |
| FDA status | Approved (Vyleesi) | Not approved |
| Key caution | Nausea, brief BP rise | Melanoma and mole risk |
How each works
PT-141 acts centrally on melanocortin receptors to raise sexual desire. Melanotan II stimulates pigment-producing cells to darken the skin.
PT-141 — who it suits
PT-141 is the FDA-approved option (as Vyleesi) for low sexual desire; it is used on demand and managed with a clinician.
Melanotan II — the safety caution
Melanotan II is not approved and carries a real safety concern: it can darken and change moles and is associated with melanoma risk. Rite Aid does not offer it, and any tanning peptide should be discussed with a clinician first.
Related
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For general education only — not medical advice or a treatment recommendation. Peptides are not a substitute for care from a licensed provider. Talk to a qualified healthcare professional before you start, stop, or change any peptide, medication, or supplement.
FAQ
No. They do different things — one is for libido, the other for tanning — and only PT-141 is approved.
It is unapproved and carries melanoma and mole-change concerns. It is not something to use casually.