Enter vial size and diluent volume to get concentration and the volume of a dose. Selank's clinical route is intranasal, so the useful output is a volume rather than a spray count — the compound itself is covered in the Selank peptide guide.
A 10 mg vial of Selank reconstituted with 6.7 mL of bacteriostatic water gives a concentration of 1.5 mg/mL, or 15 mcg per unit on a U-100 syringe. For a 300 mcg dose, draw the syringe to 20 units (0.20 mL). At that dose the vial provides about 33 doses.
Draw the syringe up to
That's one 250 mcg dose. Add 1 mL of water to your 5 mg vial first.
1.5 mg/mL is 0.15%, the concentration used in Russian clinical practice and the one figure in this fact base with a source behind it; 0.1% is also named. What no source states is a diluent volume. The 6.7 mL above is simply the arithmetic that turns a 10 mg vial into 1.5 mg/mL — it is derived from the sourced concentration and is not a standard volume. If you hold a different vial size, solve for the volume that reaches your intended concentration rather than copying 6.7 mL.
Selank draw volumes depend entirely on the concentration you mixed. At 1.5 mg/mL a 300 mcg dose is 20 units or 0.20 mL, and every amount below fits comfortably in a 1 mL U-100 barrel, because Selank is dosed in micrograms rather than milligrams. The constraint is the opposite of the GLP-1 calculators: not whether the dose fits the barrel, but whether it is large enough to read.
| Protocol row | Amount | Frequency | Draw at 1.5 mg/mL | Volume | Source |
|---|---|---|---|---|---|
| Per spray, low | 75 mcg | 2–3× daily | 5 units | 0.05 mL | Intranasal guide |
| Per spray, high | 150 mcg | 2–3× daily | 10 units | 0.10 mL | Intranasal guide |
| Daily total, low | 200 mcg | across 2–3 doses | 13.3 units | 0.133 mL | Intranasal guide |
| Russian clinical, low | 250 mcg | per dose, 14-day course | 16.7 units | 0.167 mL | Intranasal guide |
| Russian clinical, high (page reference) | 300 mcg | per dose, 14-day course; also 300 µg once daily in the morning | 20 units | 0.20 mL | Intranasal guide + science article |
| Daily total, high (intranasal guide) | 400 mcg | across 2–3 doses | 26.7 units | 0.267 mL | Intranasal guide |
| Daily total, high (science article) | 600 mcg | e.g. 300 mcg AM + 300 mcg midday | 40 units | 0.40 mL | Science article |
Per spray, low: 75 mcg two to three times daily — draw 5 units (0.05 mL) at 1.5 mg/mL. Per spray, high: 150 mcg — 10 units (0.10 mL). Daily total, low: 200 mcg across the day — 13.3 units (0.133 mL). Russian clinical, low: 250 mcg per dose in a 14-day course — 16.7 units (0.167 mL). Russian clinical, high: 300 mcg per dose — 20 units (0.20 mL). Daily total, high: 400 mcg — 26.7 units (0.267 mL); or 600 mcg — 40 units (0.40 mL).
A 13.3-unit or 16.7-unit reading is not a plunger position on a U-100 barrel — it falls between marks. At 1.5 mg/mL the readable amounts are the ones that land on whole units: 75 mcg (5 units), 150 mcg (10 units), 300 mcg (20 units), 600 mcg (40 units). If a protocol calls for 250 mcg and you want a whole-unit reading, the answer is a different concentration, not a more careful squint.
| Amount | At 1 mg/mL (0.1%) | At 1.5 mg/mL (0.15%, reference) | At 5 mg/mL |
|---|---|---|---|
| 75 mcg | 7.5 units | 5 units | 1.5 units |
| 150 mcg | 15 units | 10 units | 3 units |
| 200 mcg | 20 units | 13.3 units | 4 units |
| 250 mcg | 25 units | 16.7 units | 5 units |
| 300 mcg | 30 units | 20 units | 6 units |
| 400 mcg | 40 units | 26.7 units | 8 units |
| 600 mcg | 60 units | 40 units | 12 units |
Every cell is the same arithmetic — units = (dose mcg ÷ concentration mcg/mL) × 100. At 1 mg/mL every Selank amount in this fact base from 75 mcg to 600 mcg lands on a whole or half unit; at 5 mg/mL a 75 mcg amount is 1.5 units, which is too small a reading to be trusted. Lower concentration buys resolution — the opposite of the trade-off on a milligram-dosed compound.
Selank's primary clinical route is intranasal, and the bioavailability figures explain why: approximately 92.8% systemic bioavailability, detectable in blood within 30 seconds in rat studies, against a Semax comparison of 1.69% plasma and 0.13% brain uptake in the same kind of model. But route advantage is not technique guidance. The two technique instructions this fact base carries are these, and nothing beyond them:
Prime a new spray pump — 2–3 test sprays into the air to fill the delivery chamber. Wait approximately 30 seconds between sprays to allow initial absorption before administering a second spray. The guide names nasal congestion as the route's disadvantage, against advantages of ~92.8% bioavailability, clinical route and direct CNS access.
What is not published here, and why. No per-actuation volume, no spray count per dose, no per-nostril allocation, no bottle-size recommendation, no needle gauge. None of these appears on any source page for Selank. A dose expressed in micrograms plus a concentration is a volume; a volume becomes a spray count only when you know what your own pump delivers, and only you can measure that.
If you are measuring a Selank dose with a syringe rather than a pump, the route comparison is covered once at subcutaneous vs intramuscular injection. The science article lists the injectable route for Selank as “rare, not required” and gives no injectable amount.
Selank is not approved by the FDA, the EMA or any other Western regulator. It holds Russian clinical approval for generalised anxiety disorder and neurasthenia. Research-grade Selank sold by third-party laboratories is supplied for research use only.
Independent test records: Selank lab test records. Looking for Semax test records instead? See Semax lab tests. Tracked prices: Selank price per milligram.
It depends on the concentration. At 1.5 mg/mL — the 0.15% used in Russian clinical practice — 300 mcg is 20 units (0.20 mL) on a U-100 syringe. At 1 mg/mL it is 30 units; at 5 mg/mL it is 6 units. A units figure quoted without a concentration cannot be used.
This page cannot tell you. No source states a per-actuation volume for Selank, and a spray count depends entirely on what your own pump delivers. A dose in micrograms plus a concentration gives you a volume; converting that volume to sprays requires measuring your pump.
The concentration with a source behind it is 0.15% (1.5 mg/mL), the strength used in Russian clinical practice, with 0.1% also named. No source states a diluent volume, so the 6.7 mL this page uses for a 10 mg vial is simply the arithmetic that produces 1.5 mg/mL — not a standard.
The intranasal guide gives Selank approximately 92.8% systemic bioavailability by that route, detectable in blood within 30 seconds in rat studies, and names intranasal as the clinical standard. The science article lists the injectable route as “rare, not required” and gives no injectable amount.
The sources give 75–150 mcg per spray two to three times daily, daily totals of 200–400 mcg, and a Russian clinical range of 250–300 mcg per dose over a 14-day course; the science article also gives 300 mcg once daily in the morning and a 600 mcg daily total. This page converts an amount to a volume; it does not recommend one.
No. A certificate confirms identity and purity; net content is a separate measurement. At microgram doses a small proportional variance in fill is a large proportional variance in what you actually administer.