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Research chemical Published: limited Emerging use

PT-141 / Oxytocin Blend: dosing, reconstitution and evidence

PT-141 acts centrally on melanocortin receptors to drive arousal; oxytocin is added for its effects on bonding and subjective closeness. Used together for the combination rather than for either effect alone.

Also known as PT141 Oxytocin, bremelanotide oxytocin

Educational research reference Blends & Stacks
Quick reference. Everything you need to run PT-141 / Oxytocin Blend — dosing, frequency, reconstitution math for the vial sizes people actually buy, and what it stacks with. For anything specific to your situation, ask the Guru.

PT-141 / Oxytocin Blend quick start

Route
SubQ
Typical dose
1–3 mg total blend per dose — ratios are not standardised here, so confirm the split on your label
Frequency
As needed, 45 minutes to 2 hours before
Half-life
PT-141 about 2–3 h with effects lasting considerably longer; oxytocin is very short.
Cycle
As needed. Not a daily compound.
Vial sizes sold
10mg or 15mg
These are the numbers people actually run, drawn from the published record and from what the community has settled on over time. Educational reference, not medical advice — a starting point to work from, and one you can adjust as you learn how you respond.

How to run it

How often
As needed, 45 minutes to 2 hours before
Cycle length
As needed. Not a daily compound.
Half-life
PT-141 about 2–3 h with effects lasting considerably longer; oxytocin is very short.
Route
SubQ
Consistency matters more than perfect timing. Pick a slot in your day you will actually keep, and let DoseIQ handle the rest.

What people actually run

Paired for arousal plus connection rather than arousal alone. Newer than the other blends here and the protocols are still settling.

This is accumulated community practice — years of real-world use across a large number of people, converging on numbers that work. It is not a controlled trial, and for most compounds here no such trial exists or is ever likely to. That makes this the most reliable dosing signal available, and it is a good deal better than guessing.

What to expect

Most people tolerate PT-141 / Oxytocin Blend well. Here is what is worth knowing going in, so nothing catches you by surprise.

Nausea is the limiter and it is dose-related — start at the bottom of the range and take it on a light stomach. PT-141 raises blood pressure transiently, so worth a conversation with a doctor if yours already runs high. Timing matters more than dose here; taken too late it simply misses.

Known interactions

Interactions involving PT-141 / Oxytocin Blend's drug class that DoseIQ screens for. Each one cites where it comes from — an FDA label section or the published record — because an interaction warning you can't trace is just noise.

Caution SSRIs + melanocortins (PT-141, MT-2) — central overlap

Both act centrally; the community reports stronger nausea and blunted or altered response on the combination.

What to do: Start at the low end of melanocortin dosing and judge your own response.

Source: Community reports; melanocortin pharmacology

Caution Photosensitizing medication + tanning peptides

Melanotan use usually means deliberate UV exposure — on doxycycline or isotretinoin, that same exposure burns much faster.

What to do: Pause the deliberate sun exposure for the course, or accept much shorter sessions.

Source: FDA labels, doxycycline/isotretinoin (photosensitivity)

DoseIQ screens your whole protocol against these rules automatically — every compound, prescription and supplement you track, cross-checked as you add them. Serious flags are always free.

Reconstitution guide

PT-141 / Oxytocin Blend ships as a lyophilised powder and gets mixed with bacteriostatic water before use. How much water you add sets the concentration, which sets how many syringe units make up each dose. One unit on a U-100 syringe is 0.01 mL — the tables below do the arithmetic for the vial sizes you are most likely to be holding.

10mg vial most common

Water addedConcentration 1mg3mg
2mL (common) 5 mg/mL0.20 mL
20 units		0.60 mL
60 units
3mL 3.33 mg/mL0.30 mL
30 units		0.90 mL
90 units

15mg vial

Water addedConcentration 1mg3mg
2mL (common) 7.5 mg/mL0.13 mL
13.3 units		0.40 mL
40 units
3mL 5 mg/mL0.20 mL
20 units		0.60 mL
60 units
Ratios are not standardised at all in this one. The oxytocin fraction is usually much larger by milligram.

Standard steps

  1. Inspect the vialConfirm the label and that the powder cake is intact. Do not use a cracked or compromised vial.
  2. Let it reach room temperatureSitting out for a few minutes reduces condensation inside the vial when the seal is broken.
  3. Disinfect both stoppersWipe the compound vial and the bacteriostatic water vial with a fresh alcohol swab and let them air-dry.
  4. Draw the bacteriostatic waterUse a sterile syringe to draw the volume you have chosen from the reconstitution table.
  5. Add the water down the vial wallInject slowly so it runs down the inside wall rather than spraying directly onto the powder. This limits foaming.
  6. Dissolve gentlySwirl or roll the vial between your hands until the cake dissolves. Never shake — agitation damages peptide bonds. The solution should end up clear.
  7. Label and refrigerateWrite the reconstitution date and concentration on the vial. Store at 2–8°C. Do not freeze.
Running a different vial size or water volume? The DoseIQ calculator works it out for any combination — mcg, mg or IU, on any syringe size.
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This page is an educational research reference and is not medical advice. PT-141 / Oxytocin Blend is not approved for human use in any jurisdiction. Dose figures reflect the published record and what the community has converged on — starting points to weigh, not instructions. Consult a qualified healthcare provider before starting any protocol.