Use this Selank calculator to translate vial strength and diluent volume into a precise draw. As with Semax, Selank is sometimes used intranasally; the concentration math is the same regardless of route.
- Common vial examples
- 5 / 10 mg
- Example dose
- 250 mcg
- Common syringe
- U-100 insulin
- Last reviewed
Quick math example
A 10 mg vial mixed with 2 mL gives 5 mg/mL. A 250 mcg dose is 0.05 mL, which equals 5 units on a U-100 syringe.
Selank reconstitution reference
U-100 units to draw for each common Selank dose, by vial size, reconstituted with 2 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| 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 the Selank calculation works
Selank is labelled in milligrams per vial. The calculator divides total mg by diluent volume to get concentration, then divides your target by that concentration to return per-dose volume.
Smaller per-dose volumes are easier to read on a U-100 insulin syringe than a regular syringe.
- 10 mg vial = 10,000 mcg total
- 10,000 mcg / 2 mL = 5,000 mcg per mL
- 250 mcg target = 0.05 mL per dose
Selank 10 mg vial with 2 mL example
A 10 mg Selank vial mixed with 2 mL gives 5 mg/mL, or 5,000 mcg/mL.
A 250 mcg dose is 0.05 mL — just 5 units on a U-100 syringe. Doses this small make a U-100 insulin syringe the practical choice over a larger barrel.
- 10 mg / 2 mL = 5 mg/mL
- 250 mcg / 5,000 mcg per mL = 0.05 mL = 5 U-100 units
- Sub-mg doses are easiest to read on a U-100 syringe
Selank 5 mg vial with 2 mL example
A 5 mg vial mixed with 2 mL gives 2.5 mg/mL, or 2,500 mcg/mL.
The same 250 mcg dose now needs 0.1 mL (10 units). The more dilute vial doubles the volume per dose, which some people find easier to measure accurately than a 5-unit draw.
- 5 mg / 2 mL = 2.5 mg/mL
- 250 mcg / 2,500 mcg per mL = 0.1 mL = 10 U-100 units
- More dilution gives a larger, sometimes easier-to-read draw
Tracking small-volume doses
When draw volumes are very small, the difference between two adjacent unit lines on a syringe matters more, so a 1-unit slip is a larger percentage of the dose. Saving the exact unit count in PepSync helps avoid mistakes between doses.
Frequently asked questions
Is Selank approved as a medicine?
Can I stack Selank with Semax?
What syringe is best for sub-mg Selank doses?
Does Selank reconstitution differ for nasal use?
Primary sources
Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.