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Semax dosage calculator

Calculate your Semax reconstitution volume, dose per injection, and how long your supply will last. Enter your vial size and target dose below.

By Peptide Prime Editorial· Last reviewed 27 July 2026
How do you calculate a Semax dose?

Reconstituting a 5 mg vial of Semax with 2 mL of bacteriostatic water gives a concentration of 2500 mcg/mL. At that concentration a 300 mcg dose is 0.120 mL, which is 12.0 units on a U-100 insulin syringe, and one vial yields 16 doses of that size. Change the vial size, water volume or target dose and the arithmetic changes — the table below covers the common doses, and the calculator handles any combination.

Key facts
Vial size (default)
5 mg
Bacteriostatic water
2 mL
Concentration
2500 mcg/mL
Syringe basis
U-100 (100 units per mL)
Calculator

Run your own numbers.

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Run the Semax dosage calculator

Enter any vial size, water volume and target dose to get the exact syringe units for Semax. Create a free account to use it — and to save your results, track your protocol, and pick up where you left off on any device.

Everything else on this page — the reference values, the method, and the FAQ — is free and needs no account.

Reference

Common doses at a glance.

Every row assumes a 5 mg vial reconstituted with 2 mL of bacteriostatic water, drawn on a U-100 syringe.

Semax — dose to syringe units at 2500 mcg/mL
DoseVolumeDraw toDoses per vial
100 mcg0.040 mL4.0 U50
300 mcg0.120 mL12.0 U16
600 mcg0.240 mL24.0 U8
Method

How the arithmetic works.

  1. conc = 5 mg ÷ 2 mL = 2500 mcg/mL
  2. vol = 300mcg ÷ 2500 = 0.120 mL
  3. units = 0.120 mL × 100 = 12.0 U

A U-100 syringe is graduated so that 100 units equals 1 mL, which is why the volume in millilitres is multiplied by 100 to get the mark to draw to.

Where this falls short

This tool does unit arithmetic and nothing else. It does not know your body weight, bloodwork, medication interactions or tolerance, and it does not recommend a dose — the dose you enter is the dose you chose. It assumes a U-100 syringe and full dissolution of the compound, and it cannot account for measurement error, product purity, or a vial that was under-filled. PeptideIQ does not sell, prescribe, or recommend research compounds. Reconstitution math is provided for educational reference. Dosing decisions are between you and a licensed clinician.

Learn more

Read the reference.

FAQ

Frequently asked questions.