Use this Semax calculator to convert vial amount and diluent volume into a precise draw. Semax is sometimes used intranasally; the math for liquid concentration is the same regardless of route.
- Common vial examples
- 5 / 10 / 30 mg
- Example dose
- 1 mg
- Common syringe
- U-100 insulin
- Last reviewed
Quick math example
A 30 mg vial mixed with 3 mL gives 10 mg/mL. A 1 mg dose is 0.1 mL, which equals 10 units on a U-100 syringe.
Semax reconstitution reference
U-100 units to draw for each common Semax dose, by vial size, reconstituted with 3 mL of bacteriostatic water. Change the water volume in the calculator above to recompute for your own setup.
| 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.
How the Semax calculation works
Semax is labelled in milligrams per vial. Concentration is the total mg divided by diluent volume; per-dose volume is your target divided by that concentration.
If using a nasal spray, the per-dose volume is delivered as drops rather than syringe units, but the concentration math is identical.
- 30 mg vial = 30,000 mcg total
- 30,000 mcg / 3 mL = 10,000 mcg per mL
- 1,000 mcg target = 0.1 mL per dose
Semax 30 mg vial with 3 mL example
A 30 mg Semax vial mixed with 3 mL gives 10 mg/mL, or 10,000 mcg/mL.
A 1 mg (1,000 mcg) dose is 0.1 mL. Injected, that is 10 units on a U-100 syringe; as a nasal spray it is a 0.1 mL volume you then convert to drops based on your bottle.
- 30 mg / 3 mL = 10 mg/mL
- 1,000 mcg / 10,000 mcg per mL = 0.1 mL
- 0.1 mL = 10 U-100 units when injected
Semax 10 mg vial with 2 mL example
A smaller 10 mg vial mixed with 2 mL gives 5 mg/mL, or 5,000 mcg/mL.
The same 1 mg dose now needs 0.2 mL (20 units) because the vial is more dilute. Matching your vial size to your usual dose keeps the per-dose volume convenient.
- 10 mg / 2 mL = 5 mg/mL
- 1,000 mcg / 5,000 mcg per mL = 0.2 mL = 20 U-100 units
- A more dilute vial means a larger volume per dose
Diluent choice and storage
Bacteriostatic water is common for multi-dose vials, but specific protocols may require a different diluent. Follow the product label or pharmacy direction first, and keep reconstituted vials refrigerated and away from light.
Frequently asked questions
Is Semax approved as a medicine?
Can I use this for a nasal spray bottle?
Why are Semax doses listed in mg and mcg interchangeably?
Does the route of administration change the math?
Primary sources
Background references for this calculator. PepSync does not make clinical claims; these citations support the educational context only.