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Reconstitution · Semax

Semax reconstitution calculator

Pick the vial, the water you added and the dose. Get the exact draw in units for the syringe in your hand.

Step 1 of 4

  1. How many mg are in your vial?
    Vial amounttotal mg in the calculation
  2. How many mL of water did you add?
  3. What dose do you want to convert?
  4. Which syringe are you using?
Draw to
40.0units

0.40 mL in the syringe · 5 calculated doses from this amount

40.0 units on a U-100 insulin syringe · 1 mL · lines every 2 units, which is 0.40 milliliters. The draw lands on a syringe line.

Easy to read on this syringe. The calculated volume matches the 40-unit line. No rounding is needed.

30 mg ÷ 2 mL = 15.00 mg/mL
→ 150 mcg/unit · 6 mg = 0.400 mL = 40.0 units

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Show the math and syringe details

Can this syringe show the result clearly?

Easy to read on this syringe. 40.0 u is exactly the 40-unit line on a U-100 — no rounding error at all.

Want an easier syringe number?

This setup is already easy to read. Changing the water between 0.5 and 3 mL would not put 6 mg closer to a line on this U-100 syringe.

Adding more water makes the mixture less concentrated, so the same dose uses more syringe units. It does not change how much peptide is in the vial.

This setup is in the address bar — every input is part of the link.

Educational math, not medical advice — dosing decisions belong to a licensed clinician. The available tabs also show supply calculations and any sourced schedule.

How to use the calculator

  1. 1

    Enter the amount in the vial

    Use the total mg printed on your Semax vial.

  2. 2

    Enter the water you added

    Use the amount of water added to that vial, in mL.

  3. 3

    Enter the dose you want to convert

    Choose mg or mcg, then match the result to your syringe.

Semax is a peptide seven amino acids long, copied from a short stretch of a stress hormone. It carries none of that hormone’s own activity. It is sold as a nootropic, for focus, memory and recovery after a stroke.

In Russia it is a registered prescription medicine given as nasal drops. Stroke patients there have received it for thirty years. That work is Russian-language, and none of it was ever registered as a trial. The clearest published result is a negative one, in 27 people with motor neuron disease.

Examples using 30 mg of Semax

Each row uses 30 mg and the liquid volume shown. Dividing the amount by that volume gives the calculated concentration. The rows are arithmetic examples, not alternative product preparations.

◆ How liquid volume changes the resultdose used: 6 mg

With 1 mL bacteriostatic water

20.0 units

Concentration
30.00 mg/mL
Each U-100 unit
300.0 mcg
Syringe volume
0.200 mL
Nearest line
Exactly 20 units

With 2 mL bacteriostatic water

40.0 units

Starting example
Concentration
15.00 mg/mL
Each U-100 unit
150.0 mcg
Syringe volume
0.400 mL
Nearest line
Exactly 40 units

The amount, liquid volume and dose shown here are the calculator’s starting example for Semax. Replace them with your own values. Every result in the table is calculated from those inputs.

Drawn from once a week at 6 mg, a 30 mg vial yields 5 doses — about 5.0 weeks of supply. No storage limit is assigned to this example. Follow the dispensing label for the specific product.

Semax’s cited human studies used the nasal route

The cited Semax studies used the nasal route. They included treatment after stroke and an open-label study in motor neuron disease. Their amounts do not establish an injected dose. Working out syringe units cannot make those routes equivalent.

Read the supporting evidence3 supporting notes

A daily study amount belongs to its course

The amounts came with set treatment periods and groups of patients. A daily total is not always the amount given at one time. It also does not choose a schedule for a person outside the study.

Different outcomes should not be merged

The studies measured different things, including recovery, function and quality of life. A better score on one measure does not establish a benefit for every brain or nerve condition, or for general cognitive enhancement.

Powder dilution is a separate calculation

The tool shows how the mass and water entered affect liquid strength. It is not an instruction for a nasal product, nor evidence for a switch to injection. The math also cannot check what is in the powder.

Units to dose at 15.00 mg/mL

Mix 30 mg into 2 mL and one U-100 unit carries 150.0 mcg. The table shows how much peptide is in each numbered syringe line. These are conversion examples, not suggested doses.

Open the unit conversion table10 rows
Numbered U-100 syringe lines converted to volume and mass at 15.00 milligrams per milliliter.
U-100 lineVolumeMass (mcg)Mass (mg)
10 u0.10 mL1,500 mcg1.5 mg
20 u0.20 mL3,000 mcg3 mg
30 u0.30 mL4,500 mcg4.5 mg
40 u0.40 mL6,000 mcg6 mg
50 u0.50 mL7,500 mcg7.5 mg
60 u0.60 mL9,000 mcg9 mg
70 u0.70 mL10,500 mcg10.5 mg
80 u0.80 mL12,000 mcg12 mg
90 u0.90 mL13,500 mcg13.5 mg
100 u1.00 mL15,000 mcg15 mg

How the math works

  1. Concentration — divide the amount entered by the liquid volume used in the calculation: mg ÷ mL = mg/mL. This tells you how many mg are in each mL.
  2. Volume — the dose divided by that concentration: dose ÷ (mg/mL) = mL.
  3. Units — on a U-100 syringe one unit is 0.01 mL, so mL × 100 = units. A U-40 unit is 0.025 mL, so the wrong barrel is a 2.5× error. That is why the calculator asks which one you have.
  4. Rounding gap — the exact draw against the nearest syringe line: |exact − nearest line| ÷ exact × 100 = % difference.

Medically reviewed by Kenneth Montecillo, MD2026-09-07open the primary sources

Useful guides for this calculation

The math is only one part of the question. These guides cover the compound, published doses, side effects, mixing steps and supplies.

Semax research, dosing, and approval status

No regulator has approved semax; the guide separates human studies from reported use.

When semax reactions tend to appear

Limited human data or approval outside the United States behind the semax safety page.

What each water volume does to the 10 mg semax vial

Every option for the 10 mg semax vial, with an example draw on a U-100 barrel.

The 30 mg semax vial: concentrations and example draws

A 30 mg semax vial and a differently sized one are genuinely different arithmetic.

Mixing math for any vial, not just semax

One calculator for every vial on this site, with semax as one example

The syringe scale before the semax arithmetic starts

What one graduation is worth on each barrel, read off a federal page rather than off a semax page.

2primary sources, each with the day we read it — open the documents used on this page