PX1
Free lab tool

PT-141 (Bremelanotide) Dosage Calculator

PT-141 (Bremelanotide) is supplied in 10 mg lyophilised vials. A 2 mL reconstitution gives 5,000 mcg/mL, so a 1 mg research draw is a round 20 units.

The formula

Concentration (mg/mL) = vial strength (mg) ÷ bacteriostatic water (mL). Draw volume (mL) = dose (mg) ÷ concentration (mg/mL). On a U-100 insulin syringe, units = draw volume (mL) × 100. For PT-141 (Bremelanotide): a 10 mg vial in 2 mL of water is 5 mg/mL, so a 1 mg dose is 0.2 mL — 20 units.

Your PT-141 (Bremelanotide) vial

1 mg = 1,000 mcg

Syringe size

Your result

Draw to

20

units on a U-100 insulin syringe

= 0.2 mL

Concentration
5mg/mL
5,000 mcg/mL
Draws per vial
10
at 1000 mcg each

For laboratory and research use only. This calculator is a unit-conversion aid and is not medical guidance or a dosing recommendation.

Buy PT-141 (Bremelanotide) — 99%+ purity, COA per lot

PT-141 (Bremelanotide) units per dose — quick reference

U-100 insulin-syringe units for each vial size we ship, reconstituted with 2 mL of bacteriostatic water.

PT-141 (Bremelanotide) insulin syringe units per dose by vial size
VialConcentration500 mcg1 mg1.5 mg2 mg
10 mg5 mg/mL10 u20 u30 u40 u

How to reconstitute a PT-141 (Bremelanotide) vial

  1. 1. Bring the vial to room temperature. Let a refrigerated or frozen vial equilibrate before opening so condensation doesn't form on the powder.
  2. 2. Swab both stoppers. Wipe the PT-141 (Bremelanotide) vial and the bacteriostatic water vial with alcohol and let them dry.
  3. 3. Draw your diluent. Pull the volume you entered above into the syringe.
  4. 4. Run it down the glass wall. Angle the needle so water flows down the side of the vial rather than jetting onto the peptide cake — shear and foaming degrade peptides.
  5. 5. Swirl, never shake. Roll the vial gently until fully clear. Do not vortex or shake.
  6. 6. Label and refrigerate. Mark the date and concentration, then store at 2-8 °C away from light.

PT-141 (Bremelanotide) calculator FAQs

How many units is 1 mg of PT-141?

A 10 mg vial with 2 mL of bacteriostatic water is 5 mg/mL, so 1 mg is 0.2 mL — 20 units on a U-100 insulin syringe, with 10 draws per vial.

How do you calculate a PT-141 (Bremelanotide) dose in syringe units?

Divide the vial strength by the bacteriostatic water you added to get the concentration: concentration (mg/mL) = vial mg ÷ water mL. Then draw volume (mL) = dose (mg) ÷ concentration. On a U-100 insulin syringe, 1.0 mL is 100 units, so units = draw volume × 100.

Does adding more water change how much PT-141 (Bremelanotide) is in the vial?

No. The vial holds a fixed mass of lyophilised powder. More bacteriostatic water only dilutes it — each syringe unit carries less compound and the draw volume for the same dose gets larger, which can make small doses easier to measure accurately.

How is reconstituted PT-141 (Bremelanotide) stored?

After reconstitution with bacteriostatic water, research peptides are kept refrigerated at 2-8 °C, protected from light, and away from freeze-thaw cycles. Unreconstituted lyophilised vials are far more stable and are typically stored frozen.

Other dosage calculators