Semax peptide calculator
A 5 mg Semax vial mixed with 2 ml of bacteriostatic water holds 2.5 mg/ml. A 300 mcg dose is 0.12 ml — 12 units on a U-100 insulin syringe — and the vial holds 16 doses of that size.
Semax dosage chart: units to draw
Units on a U-100 insulin syringe (100 units = 1 ml) for Semax doses from 200 mcg to 600 mcg, by how much bacteriostatic water is in a 5 mg vial. The highlighted row is the 300 mcg dose used above.
| Dose | 1 ml water 5 mg/ml | 2 ml water 2.5 mg/ml | 3 ml water 1.67 mg/ml | Doses per vial |
|---|---|---|---|---|
| 200 mcg | 4 u 0.040 ml | 8 u 0.080 ml | 12 u 0.12 ml | 25 |
| 300 mcg | 6 u 0.060 ml | 12 u 0.12 ml | 18 u 0.18 ml | 16 |
| 600 mcg | 12 u 0.12 ml | 24 u 0.24 ml | 36 u 0.36 ml | 8 |
A 12-unit draw fits comfortably on a 0.3 ml insulin syringe (30-unit capacity), whose 1-unit (often half-unit) markings are easier to read than the 2-unit ticks on a 1 ml syringe.
Unit math only, not a dosing recommendation. The dose range is what published protocols and trials describe; see the Semax guide for sources.
How to reconstitute Semax
- Wipe both vial stoppers with a fresh alcohol swab and let them dry.
- Draw 2 ml of bacteriostatic water into a syringe.
- Insert the needle at an angle into the Semax vial and let the water run slowly down the inner wall — do not inject directly onto the powder.
- Do not shake. Gently swirl the vial until the peptide fully dissolves.
- Storage for Semax: Lyophilized refrigerated. Reconstituted for nasal spray: refrigerated, use within 2–4 weeks.
- For a 300 mcg dose, draw to the 12-unit mark (0.12 ml) on a U-100 insulin syringe.
About Semax
Semax is a synthetic peptide derived from a fragment of adrenocorticotropic hormone (ACTH). It is studied for cognitive enhancement, neuroprotection, and stroke recovery.
Half-life: Short systemically (minutes); CNS effects persist hours
Typical dose range: 200–600 mcg intranasally, 1–3x daily
Class: Synthetic ACTH 4-10 analog / nootropic
Regulatory status: Approved as a prescription drug in Russia for stroke recovery and cognitive disorders; not FDA approved in the US.
Read the full Semax guide → — mechanism, side effects, storage, regulatory status and citations. Or browse the whole peptide glossary.
Other tools for Semax
Calculators for related peptides: Selank.
Need a different unit or a different question? The peptide dose converter moves a dose between mcg, mg and IU, and the half-life visualizer shows how concentration accumulates across a dosing cadence. Loading Semax into a reusable 3 ml pen instead of drawing it with a syringe? The peptide pen calculator turns the same vial into mcg per click and clicks to dial. All of them are listed on the free peptide tools page.
Semax calculator FAQ
Is this a Semax peptide calculator or a reconstitution calculator?
Both. This Semax calculator converts vial strength, bacteriostatic-water volume, and target dose into milliliters and insulin-syringe units. It does not recommend a medical dose.
How much bacteriostatic water for a 5 mg Semax vial?
This page is pre-filled with 2 ml of bacteriostatic water for a 5 mg Semax vial because that is a common research ratio. You can adjust the water amount in the full calculator.
How many units is a 300 mcg Semax dose?
12 units on a U-100 insulin syringe, when a 5 mg vial is mixed with 2 ml of bacteriostatic water (2.5 mg/ml). That is 0.12 ml. With a different amount of water the unit count changes — the dose chart on this page lists 1 ml, 2 ml, 3 ml mixes.
How many doses are in a 5 mg Semax vial?
16 doses of 300 mcg. The number of doses depends only on vial strength and dose size — adding more or less water changes the volume of each draw, not how many draws the vial holds.
Does this Semax dosage calculator give medical advice?
No. It only performs unit math. Dosing, titration, and whether Semax is appropriate are clinical decisions that should be made with a licensed healthcare professional.
Skip the math — let the app handle it
Peptide Protocol remembers your Semax vial, shows the units for every dose, tracks what is left, and rotates injection sites for you.
Get the iPhone app →Educational use only. Peptide Protocol is an informational tool. Nothing on this page constitutes medical advice. Many peptides are prescription-only or restricted in your jurisdiction. Always consult a licensed healthcare professional before injecting any compound.