semax / Selank calculator

Semax 10 mg + Selank 10 mg in 3 mL: 10 units on a U-100 syringe holds 0.333 mg Semax and 0.333 mg Selank.

Sizes on sale: 5/5mg, 10/10mg. Choose a vial, the water and the amount per draw; prices are the lowest current US offers, and blend vials show every component per draw.

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bacteriostatic water added

Semax per draw

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10 units holds

0.333 mg Semax · 0.333 mg Selank

Each component per draw
component	in the vial	concentration	per draw
Semax	10 mg	3.3333 mg/mL	0.333 mg
Selank	10 mg	3.3333 mg/mL	0.333 mg

20 mg total · 6.6667 mg/mL total · enter an amount per draw for the draw and draws per vial

between the 9.5 and 10 lines · nearest mark 10 units

10 units falls between the 9.5 and 10 marks; the nearest is 10 (+0%).

the working

Semax: 10 mg ÷ 3 mL = 3.3333 mg/mL
0.3333 mg ÷ 3.3333 mg/mL = 0.1 mL = 10 units
Selank: 3.3333 mg/mL × 0.1 mL = 0.333 mg

If this is a prescription, the dose and volume on your pharmacy label take priority. Ask your pharmacist about any mismatch.

updated Nov 4, 2026 · exact arithmetic, checked against 21 worked cases · prices from offers checked in the last 7 days

no published dosing data

Semax / Selank dosing evidence

No studies of the combined product were found; Semax and Selank are each registered separately in Russia as nasal drops. PeptideTech does not list unsourced doses; the Semax / Selank research profile lists the published studies.

every component per draw

blend chart

Blend components per 10 units at 2 mL of water
blend vial	in 2 mL, 10 units holds	calculator
Semax / Selank 5/5 mg	0.25 mg Semax · 0.25 mg Selank	calculate
Semax / Selank 10/10 mg	0.5 mg Semax · 0.5 mg Selank	calculate

A blend's label can state each component (10/10 mg) or only the total (20 mg); the split above is from each vendor's listing.

what the numbers mean · where they come from

terms and sources

Label amount or measured amount. The calculator starts from the amount printed on the vial. A lot certificate’s measured content (net peptide content, in mg) can replace it for the vial that was tested. HPLC purity is a share of peak area, not a mass, so a purity-only correction is shown as an estimate. See HPLC, certificate of analysis and how to read a peptide COA.
Concentration. Amount in the vial ÷ water added. Terms: reconstitution, bacteriostatic water, lyophilized.
Syringe units. A volume: 0.01 mL per unit on a U-100 syringe, 0.025 mL on U-40. Units say nothing about the compound until the concentration is known.
Cost per draw. Vial price × amount per draw ÷ vial amount, from the price per mg of a current offer. Offers come from the Semax / Selank price comparison; certificates from the COA library.

Arithmetic only, on the numbers entered. Amounts from labels or trials are cited references, not recommendations; PeptideTech does not give personal use instructions and does not test products.

short answers