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PT-141 + Melanotan II stack

Two related peptides sold together: PT-141 (for libido) and Melanotan II (for tanning).

Quick facts

Status
Not an approved medicine
Evidence
No human data for the combination
Taken as
Injection under the skin (separate vials)
Sold as
Usually 10 mg of each, in separate vials.
Category
Stack · melanocortin agonists (experimental)

How it works

Both act on the same melanocortin receptors, so side effects add up.

What people use it for

  • Libido
  • Tanning

What the research shows

No studies of the combination.

Side effects & risks

  • Nausea and flushing — often stronger together
  • Higher blood pressure
  • Darker skin and changing moles — get any changing mole checked

Is it legal?

Bremelanotide is approved only in the US (Vyleesi) for a specific indication; Melanotan II is not approved anywhere and regulators have warned against it.

Storage & safe handling

  • Mix with bacteriostatic water: let it run slowly down the inside of the vial and swirl gently — never shake.
  • Store the mixed vial in the fridge and follow the use-by period on the label.
  • Wipe the vial top with alcohol and use a new sterile needle and syringe every time.
  • Rotate injection sites so the same spot is not used again and again.
  • Put used needles in a sharps container, not the household bin.
  • Get medical help for redness that spreads, fever, swelling or trouble breathing.
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Sources: See the Bremelanotide and Melanotan II fact sheets.
Last updated 12 October 2026. Information — not medical advice. PepTimer does not replace a doctor. Many peptides are not approved medicines in the EU, UK or US. Talk to a qualified healthcare provider before starting, changing or stopping any treatment.