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Per-compound reconstitution
Each compound is calculated on its own — different vials, different concentrations, different draws. Use these references, then run your exact numbers on each compound's calculator.
Semax reference
U-100 units to draw for each common Semax dose, by vial size, reconstituted with 3 mL of bacteriostatic water.
| Vial | Concentration | 300 mcg | 600 mcg | 1 mg |
|---|---|---|---|---|
| 5 mg | 1.67 mg/mL | 18 u(0.18 mL) | 36 u(0.36 mL) | 60 u(0.6 mL) |
| 10 mg | 3.33 mg/mL | 9 u(0.09 mL) | 18 u(0.18 mL) | 30 u(0.3 mL) |
| 30 mg | 10 mg/mL | 3 u(0.03 mL) | 6 u(0.06 mL) | 10 u(0.1 mL) |
Swipe the table to see every dose →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100). Always confirm against your own vial, diluent, and clinician or pharmacy instructions.
Selank reference
U-100 units to draw for each common Selank dose, by vial size, reconstituted with 2 mL of bacteriostatic water.
| Vial | Concentration | 250 mcg | 500 mcg | 750 mcg |
|---|---|---|---|---|
| 5 mg | 2.5 mg/mL | 10 u(0.1 mL) | 20 u(0.2 mL) | 30 u(0.3 mL) |
| 10 mg | 5 mg/mL | 5 u(0.05 mL) | 10 u(0.1 mL) | 15 u(0.15 mL) |
Swipe the table to see every dose →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100). Always confirm against your own vial, diluent, and clinician or pharmacy instructions.
How are Semax and Selank run together?
Semax and Selank are often used on the same days, sometimes Semax earlier and Selank later, but each is reconstituted and measured on its own. Because both are commonly used intranasally, many people reconstitute to a concentration that gives a convenient per-spray volume rather than a syringe draw — the calculator returns the per-dose mL either way.
- Both compounds: injectable or intranasal, same concentration math
- Calculate each separately — different vial sizes and doses
- For nasal use, convert the per-dose mL to drops for your specific bottle
Semax and Selank dosage chart: Semax units
Units to draw on a U-100 syringe for common Semax doses at three vial set-ups. More water makes a weaker mix, so the same dose takes more units.
Semax dosage chart in U-100 units
| Dose | 5 mg + 2 mL2.5 mg/mL | 10 mg + 2 mL5 mg/mL | 30 mg + 3 mL10 mg/mL |
|---|---|---|---|
| 300 mcg | 12 u(0.12 mL)16 per vial | 6 u(0.06 mL)33 per vial | 3 u(0.03 mL)100 per vial |
| 600 mcg | 24 u(0.24 mL)8 per vial | 12 u(0.12 mL)16 per vial | 6 u(0.06 mL)50 per vial |
| 1 mg | 40 u(0.4 mL)5 per vial | 20 u(0.2 mL)10 per vial | 10 u(0.1 mL)30 per vial |
Swipe the table to see every vial →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100); “per vial” is how many of that dose the vial holds, before the small dead-space loss on each draw. Confirm against your own vial label, diluent, and clinician or pharmacy instructions.
Selank dosage calculator chart: Selank units
Units to draw on a U-100 syringe for common Selank doses at three vial set-ups. For your exact vial and dose, use the Selank calculator linked above.
Selank dosage chart in U-100 units
| Dose | 5 mg + 2 mL2.5 mg/mL | 10 mg + 2 mL5 mg/mL | 10 mg + 3 mL3.33 mg/mL |
|---|---|---|---|
| 250 mcg | 10 u(0.1 mL)20 per vial | 5 u(0.05 mL)40 per vial | 7.5 u(0.08 mL)40 per vial |
| 500 mcg | 20 u(0.2 mL)10 per vial | 10 u(0.1 mL)20 per vial | 15 u(0.15 mL)20 per vial |
| 750 mcg | 30 u(0.3 mL)6 per vial | 15 u(0.15 mL)13 per vial | 22.5 u(0.22 mL)13 per vial |
Swipe the table to see every vial →
Educational reference only — not a dose recommendation. Units assume a U-100 insulin syringe (100 units = 1 mL on U-100); “per vial” is how many of that dose the vial holds, before the small dead-space loss on each draw. Confirm against your own vial label, diluent, and clinician or pharmacy instructions.
What concentration should you use for nasal vs injectable Semax and Selank?
If you intend to use a nasal spray, pick a reconstitution volume that puts a single spray near your target dose, since spray bottles deliver a fixed volume per actuation. For injection, optimise instead for a readable number of syringe units. The reference tables above show the injectable units; the underlying per-dose volume is the number you would convert to drops.
- Nasal: tune concentration to your bottle's per-spray volume
- Injection: tune concentration for clean U-100 unit marks
- Same vial, same math — only the delivery differs
Frequently asked questions
Can Semax and Selank be mixed in one vial?
Does the stack math change for nasal use?
Are Semax and Selank approved medicines?
How many units is 250 mcg of Selank?
Primary sources
Background references for this page. PepSync does not make clinical claims; these citations support the educational context only.
- 1Semax, an analog of ACTH(4-10) with cognitive effects, regulates BDNF and trkB expression in the rat hippocampusPubMed / Brain Research · 2006
- 2Peptide-based Anxiolytics: The Molecular Aspects of Heptapeptide Selank Biological ActivityPubMed / Protein and Peptide Letters · 2018
- 3A comparison of the anxiolytic effect and tolerability of selank and phenazepam in the treatment of anxiety disordersPubMed / Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova · 2014