PT-141 Reconstitution Calculator
Reconstitute a PT-141 vial and get exact insulin-unit doses.
Open the calculator
Pre-filled with PT-141 defaults — adjust vial size, water volume, and dose to your protocol.
About the PT-141 Reconstitution Calculator
PT-141 (Bremelanotide) is commonly supplied as a 10 mg lyophilized vial for research use. Reported research doses range from roughly 0.5 mg to 2 mg, so a low-to-mid reconstitution volume keeps each dose within a small, easy-to-draw insulin unit count.
Enter your vial strength, water volume, and dose below. The calculator returns the mg/mL concentration, the exact mL to draw, and the equivalent U-100 insulin units. A 10 mg vial reconstituted with 2 mL of bacteriostatic water yields 5 mg/mL — a 1 mg dose is then 0.2 mL (20 units).
Quick reference
- Typical vial sizes
- 10 mg
- Typical research dose range
- 0.5–2 mg per research dose
How to prepare PT-141
- Draw the intended volume of bacteriostatic water into a sterile syringe.
- Slowly inject the water down the inside wall of the PT-141 vial — never directly onto the lyophilized powder.
- Gently swirl (do not shake) until the powder is fully dissolved and the solution is clear.
- Store the reconstituted vial refrigerated at 2–8°C and use within the peptide's stability window.
- Use the concentration and dose volume calculated above to draw each research dose into an insulin syringe.
Frequently asked questions
How do I reconstitute PT-141?
Add bacteriostatic water to the PT-141 vial using the volume the calculator recommends for your desired concentration. Slowly inject the water down the side of the vial, swirl gently, and store the vial refrigerated.
What bacteriostatic water volume should I use for PT-141?
Common choices are 1 mL, 2 mL, or 3 mL of bacteriostatic water. The right volume depends on your vial strength and target dose — use the calculator above to get a concentration that lets you draw your dose in whole insulin units.
What is a typical research dose range for PT-141?
Reported research dose ranges for PT-141 are 0.5–2 mg per research dose. Always verify against current literature — this tool is for research reference only, not medical advice.
How long is PT-141 stable after reconstitution?
Once reconstituted with bacteriostatic water and stored refrigerated (2–8°C), most peptides remain stable for roughly 28–30 days. Check the specific stability data for PT-141 for your batch.
Can I use this PT-141 calculator with any insulin syringe?
Yes. The calculator supports U-100 syringes in 30, 50, and 100-unit capacities and shows both the mL dose volume and the equivalent insulin units for whichever syringe you choose.
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