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Melanotan II 10 mg Vial: Reconstitution and Dosing Chart

How much bacteriostatic water to add to a 10 mg vial of Melanotan II, the concentration you get, and a full dose-to-units chart.

Medically reviewed by Juan Pablo Frías, MD · · DisclosureMelanocortin agonistUpdated
Vial size
10 mg
With 2 mL water
5 mg/mL
common choice
10 units contain
500 mcg
at 2 mL, U-100
Whole vial
200 units
2 mL on a U-100 scale

How much water to add

Bacteriostatic water only changes the concentration, not the amount of Melanotan II in the vial. More water means more units per dose (easier to read), less water means fewer.

Melanotan II 10 mg vial: concentration by water added
Water addedConcentration10 units contain100 mcg isWhole vial
1 mL10 mg/mL1000 mcg1 u100 u
2 mL5 mg/mL500 mcg2 u200 u
2.5 mL4 mg/mL400 mcg2.5 u250 u
3 mL3.333 mg/mL333.3 mcg3 u300 u

Calculator and full dosing table

Preset to the 10 mg vial. Change any value; the table below the result updates with it.

1Vial size
2Bacteriostatic water added
3Dose per injection
4Syringe (U-100)
Draw to
10units
= 0.1 mL on a 1 mL U-100 insulin syringe
10 mg vial2 mL water500 mcg dose
Concentration
5 mg/mL
Doses per vial
20
Weeks (1 dose/wk)
20
Math only. It does not recommend a dose.

10 units (0.1 mL) on a 1 mL U-100 syringe: 500 mcg from a 10 mg vial + 2 mL water (Melanotan II).

Dosing table for a 10 mg vial

Syringe units (U-100) for each dose, by how much bacteriostatic water you add.

Melanotan II: U-100 syringe units per dose for a 10 mg vial
Dose1 mL water2 mL water2.5 mL water3 mL water
100 mcg122.53
250 mcg2.556.257.5
500 mcg51012.515
750 mcg7.51518.7522.5
1000 mcg10202530

How the math works

Concentration is the vial's milligrams divided by the water you add. Volume to draw is your dose divided by that concentration. On a U-100 syringe, 1 mL is 100 units, so units = mL × 100.

10 mg ÷ 2 mL = 5 mg/mL
500 mcg = 0.5 mg; 0.5 mg ÷ 5 mg/mL = 0.1 mL
0.1 mL × 100 = 10 units
10 units · 0.1 mL · 500 mcg from 10 mg + 2 mL
Math only. The amounts in these tables are reference values for the arithmetic, not dose recommendations.

Common questions

How much water goes in a 10 mg vial of Melanotan II?

That choice only changes the concentration. With 2 mL, a 10 mg vial is 5 mg/mL; with 1 mL it is 10 mg/mL. Less water means fewer units per dose and harder-to-read marks for small doses.

How many units is 100 mcg from a 10 mg vial?

With 2 mL of water, 100 mcg is 2 units on a U-100 syringe. With other water amounts, see the table.

How many doses are in a 10 mg vial?

Divide the vial size by the dose (in the same unit). The calculator on this page shows the number of whole doses for any dose you pick.

More on Melanotan II

DosageDoses used in published studies, with the source for each.CalculatorVial, water and dose to syringe units.Side effectsWhat labels and studies report, and what is unknown.ResultsStudy outcomes and when they were measured.PricePrice per mg and per week from dated listings. No vendor links.Legal statusFDA, compounding and WADA status with dates.

Sources

  1. 1Metric (SI) Prefixes (NIST Reference on Constants, Units, and Uncertainty)National Institute of Standards and Technology (NIST) · 2025physics.nist.govAccessed 2 Oct 2026
  2. 2BASAGLAR (insulin glargine) injection, prescribing information (DailyMed)U.S. Food and Drug Administration / DailyMed (Eli Lilly and Company label) · 2026dailymed.nlm.nih.govAccessed 2 Oct 2026

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