PT-141 peptide calculator
Pre-filled PT-141 dosage and reconstitution math: a 10 mg vial, 2 ml of bacteriostatic water, and the resulting U-100 insulin-syringe units. Adjust the inputs below or open the full calculator.
How to reconstitute PT-141
- Wipe both vial stoppers with a fresh alcohol swab and let them dry.
- Draw 2 ml of bacteriostatic water into a syringe.
- Insert the needle at an angle into the PT-141 vial and let the water run slowly down the inner wall — do not inject directly onto the powder.
- Do not shake. Gently swirl the vial until the peptide fully dissolves.
- Store the reconstituted vial refrigerated (2–8 °C / 36–46 °F) and use within roughly 28 days.
- Draw each dose to the unit mark shown above for your target 1000 mcg dose.
About PT-141
PT-141 (bremelanotide) is a synthetic melanocortin receptor agonist developed from melanotan II. It acts on central nervous system pathways rather than the vascular system to enhance sexual arousal.
Half-life: Approximately 2 hours
Typical dose range: 0.5–2 mg (500–2000 mcg) per dose, on demand
Class: Melanocortin receptor agonist (MC3R / MC4R)
PT-141 calculator FAQ
Is this a PT-141 peptide calculator or a reconstitution calculator?
Both. This PT-141 calculator converts vial strength, bacteriostatic-water volume, and target dose into milliliters and insulin-syringe units. It does not recommend a medical dose.
How much bacteriostatic water for a 10 mg PT-141 vial?
This page is pre-filled with 2 ml of bacteriostatic water for a 10 mg PT-141 vial because that is a common research ratio. You can adjust the water amount in the full calculator.
How many units is a 1000 mcg PT-141 dose?
With the default 10 mg vial and 2 ml BAC-water ratio, the preview above calculates the U-100 syringe units for a 1000 mcg dose. Change the dose if your protocol uses a different amount.
Does this PT-141 dosage calculator give medical advice?
No. It only performs unit math. Dosing, titration, and whether PT-141 is appropriate are clinical decisions that should be made with a licensed healthcare professional.
Skip the math — let the app handle it
Peptide Protocol pre-fills reconstitution, tracks every dose, and flags rotations automatically.
See the app →Educational use only. Peptide Protocol is an informational tool. Nothing on this page constitutes medical advice. Many peptides are prescription-only or restricted in your jurisdiction. Always consult a licensed healthcare professional before injecting any compound.