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Multi-peptide blend · 2 components

What's in PT-141 + Oxytocin Spray?

Ready-mixed spray with 5mg PT-141 and 10mg oxytocin.

Multi-Peptide BlendsSprayUpdated 2026-11-09

Per-vial contents

Combination untested. Labeled 3mcg PT-141 and 7mcg oxytocin per spray. Combines a melanocortin agonist with the oxytocin receptor ligand.
Original illustration for PT-141 + Oxytocin (XO Blend) Spray research notes: abstract molecular artwork in orange and teal
Original illustration by USA Peptide Vendors; artistic, not a structural model.

What each component does on its own

Evidence level: Components only: no study has tested this combination. All mechanism maps

PT-141 + Oxytocin (XO Blend) Spray mechanism diagramEach component's own reported mechanism, side by side. Targets: PT-141: MC4R, Oxytocin: OXTR. : . Effect reported for that component alone: Erectile response, Uterine contraction.PT-141 + Oxytocin (XO Blend) Spray mechanism mapEach component's own reported mechanism, side by sidePT-141 + Oxytocin (XO Blend)Spray2-component blendPT-141: MC4Ralso MC3R [1]Oxytocin: OXTRoxytocin receptor [2]Erectile responsemen, phase 2 [3]Uterine contraction[2]Evidence: Components only: no study has tested this combination. Numbers in brackets referto the cited sources.usapeptidevendors.com · Research Use OnlyCOMPONENT → REPORTED TARGETEFFECT REPORTED FOR THAT COMPONENT ALONE
Each row comes from studies of that peptide on its own. Whether the blend behaves like the sum of its parts has not been studied. Open SVG
  1. Molinoff PB et al. PT-141: a melanocortin agonist for the treatment of sexual dysfunction. Ann N Y Acad Sci. 2003;994:96-102.
  2. Gimpl G et al. The oxytocin receptor system: structure, function, and regulation. Physiol Rev. 2001;81:629-83.
  3. Diamond LE et al. Double-blind, placebo-controlled evaluation of the safety, pharmacokinetic properties and pharmacodynamic effects of intranasal PT-141, a melanocortin receptor agonist, in healthy males and patients with mild-to-moderate erectile dysfunction. Int J Impot Res. 2004;16:51-9.

Blend-specific checks

  • Ask for net content per component: PT-141 (Bremelanotide) (5mg), Oxytocin (10mg). A single purity figure for the vial doesn't cover each peptide.

FAQ

What is PT-141 + Oxytocin (XO Blend) Spray?

Ready-mixed spray with 5mg PT-141 and 10mg oxytocin. Labeled 3mcg PT-141 and 7mcg oxytocin per spray. Combines a melanocortin agonist with the oxytocin receptor ligand.

What's in PT-141 + Oxytocin (XO Blend) Spray?

PT-141 (Bremelanotide) 5mg, Oxytocin 10mg. No published study has tested this exact combination; each component's evidence is separate.

Where can US labs buy PT-141 + Oxytocin (XO Blend) Spray?

Purgo Labs stocks it as “PT-141/Oxytocin (XO BLEND)”; code usapeptidevendors takes 25% off at checkout. This page also lists the best-documented second vendor from our 112-vendor directory.

Is research-grade PT-141 + Oxytocin (XO Blend) Spray for human use?

No. Vendor material is sold for Research Use Only, not for human or veterinary use.