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Sexual Health

PT-141 dosing guide

Centrally acting libido — bypass the vascular pathway of Viagra and Cialis entirely.. Everything below is the arithmetic of this vial — what to mix, what to draw, how often, and for how long.

Also sold as: pt141, pt 141, bremelanotide, vyleesi

The protocol at a glance

Vial size
10 mg
Bacteriostatic water
2 mL
Concentration
5.00 mg/mL
Dose
1 mg
Draw on a 1 mL syringe
20 units
Timing
45–60 min before activity
Frequency
As needed
Cycle length
As needed
Doses per vial
about 10

Start at 500mcg to assess tolerance; typical use dose is 1–1.75mg. Common side effects: nausea, flushing.

Draw to here
00.0100.1200.2300.3400.4500.5600.6700.7800.8900.91001.0DRAW TO 20u100-UNIT · 1 mL SYRINGEPT-141
Change the vial or water volume in the calculator →

Mixing it, step by step

Step by step

Reconstitution steps

Every step below uses the numbers you entered above.

  1. 1
    Wipe both stoppers

    Swab the rubber tops of the 10 mg PT-141 vial and the bacteriostatic water vial with fresh alcohol pads. Let them air dry for a few seconds.

  2. 2
    Draw 2 mL of BAC water

    Pull 2 mL of bacteriostatic water into a reconstitution syringe (usually a 3 mL syringe with a 21g needle).

  3. 3
    Add water slowly, down the side

    Inject the water against the inside wall of the vial, don't blast it directly onto the powder. This protects the peptide from shear damage.

  4. 4
    Swirl, don't shake

    Gently swirl until the powder is fully dissolved and the liquid is clear. Never shake, foaming denatures the peptide.

  5. 5
    Draw 20 units on a 1 mL syringe

    On your 100-unit (1 mL) insulin syringe, pull the plunger back until the rubber tip lines up with 20, that's your 1.00 mg dose. Tap out any air bubbles, then inject as directed.

  6. 6
    Store refrigerated

    Cap the vial and store at 2–8 °C (36–46 °F). Most reconstituted peptides remain stable for 3–4 weeks refrigerated.

What to expect, week by week

Acute (PT-141, Oxytocin)

Effect within 30–90 minutes. Facial flushing and slight nausea are common early on.

Weeks 1–4 (Gonadorelin, HCG)

Testicular volume returns on TRT. Fertility markers respond over 8–12 weeks.

Side effects to watch

  • Nausea
  • Facial flushing
  • Headache
  • Transient BP increase

Why people run it

  • Increased libido (M and F)
  • Works when PDE5 inhibitors fail
  • Acts on desire, not just function

What to stack it with

Ready to run PT-141?

Read the full compound page, or check current pricing.

Educational reference only. Doses shown reflect commonly reported research protocols and are not medical advice.

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