Selank Dosing Calculator
Selank: Tuftsin-derived anxiolytic nootropic peptide.
Pre-filled with the most-reported community reconstitution protocol for Selank. See how 1 mL and 2 mL of bacteriostatic water change concentration and syringe-draw volume, then adjust the calculator below for your own vial.
Quick answer · Community-reported standard
A 5 mg vial of Selank reconstituted with 2 mL of bacteriostatic water yields a concentration of 2.50 mg/mL. At that concentration, a 250 mcg dose of Selank equals 10 units on a U-100 insulin syringe (0.100 mL). Selank is typically administered once daily via subcutaneous.
Selank reconstitution: 1 mL vs 2 mL bac water
Bacteriostatic water volume is flexible. Less water means higher concentration and smaller injection volumes; more water means lower concentration and easier dose precision. Both options below are valid for a 5 mg vial.
| BAC water added | Concentration | Volume per 250 mcg dose | Draw on U-100 syringe (units) |
|---|---|---|---|
| 1 mL | 5.00 mg/mL | 0.050 mL | 5 units |
| 2 mL | 2.50 mg/mL | 0.100 mL | 10 units |
Calculate your Selank dose
Alternative Selank protocols
Beyond the default above, Selank is also reported in the following protocols. Use these as starting points and recalculate with the tool above.
Standard Intranasal Protocol
Community- Dose
- 200-300 mcg
- Frequency
- 2-3 times daily
- Duration
- 4-6 weeks
- Route
- Intranasal
Most widely used protocol; 2-3 spray pumps per nostril daily, typically cycled 1 month on / 1 month off
Higher-Dose Anxiolytic Protocol
Community- Dose
- 600-900 mcg
- Frequency
- 2-3 times daily (split doses)
- Duration
- 2-4 weeks
- Route
- Intranasal
Used by those seeking stronger anxiolytic effects; total daily dose split across administrations
Low-Dose Maintenance
Community- Dose
- 100-200 mcg
- Frequency
- Once daily
- Duration
- Ongoing (4 weeks on, 4 weeks off)
- Route
- Intranasal
Used as a daily anxiolytic/nootropic maintenance dose with monthly cycling
Anxiolytic and nootropic support (intranasal)
Clinical- Dose
- 250-900 mcg per dose (0.15% nasal solution)
- Frequency
- 2-3 times daily
- Duration
- 14-30 days per course, followed by an equal rest period
Based on Russian clinical use and the Syunyakov 2012 GAD study (2700 mcg/day total intranasal)
Cognitive enhancement (subcutaneous)
Clinical- Dose
- 200-400 mcg per dose
- Frequency
- Once daily, 5 days per week
- Duration
- 30 days on, 30 days off
Anecdotal protocol; no formal human SC PK data available
Selank reconstitution & storage
Selank is typically supplied as a pre-made 0.15% nasal solution ready for intranasal use. If obtained as lyophilized powder for SC use, reconstitute with bacteriostatic water by adding diluent slowly along the vial wall.
Store nasal solution at 2-8C (refrigerated). Lyophilized powder can be stored at -20C for long-term storage. Protect from light. Reconstituted solutions should be used within 2-3 weeks.
Selank dosing FAQ
How much bacteriostatic water should I add to a 5 mg vial of Selank?
The community standard is 2 mL of bacteriostatic water for a 5 mg Selank vial. That gives a concentration of 2.50 mg/mL, so a 250 mcg dose is 10 units on a U-100 insulin syringe. Adding 1 mL instead doubles the concentration to 5.00 mg/mL and halves the draw to 5 units. Less water = smaller injection volume but harder to measure precisely.
How many syringe units is a 250 mcg dose of Selank?
On a standard U-100 insulin syringe, a 250 mcg dose of Selank is 10 units when the 5 mg vial is reconstituted with 2 mL of bacteriostatic water (2.50 mg/mL). If you use 1 mL of bac water instead, draw 5 units (5.00 mg/mL).
What is the standard Selank dose?
Community-reported protocols for Selank typically use 250 mcg–500 mcg once daily via Subcutaneous. 250 mcg is a common starting dose. Some users prefer injection for more consistent dosing; 5-days-on/2-off cycling common
How long does a vial of Selank last at 250 mcg once daily?
A 5 mg vial of Selank contains roughly 20 doses at 250 mcg per injection. At once daily dosing, that is approximately 20 days (about 3 weeks) of supply per vial. Reconstituted Selank should generally be used within 28 days when refrigerated.
Where do you inject Selank?
Selank is typically injected subcutaneous. Common sites reported in the literature and by users include: Intranasal spray (primary route), Subcutaneous injection in abdominal area (alternative route). Rotate sites with each injection to reduce localized irritation.
Can I use sterile water instead of bacteriostatic water for Selank?
Bacteriostatic water (containing 0.9% benzyl alcohol as a preservative) is strongly preferred for multi-dose vials like Selank because it inhibits microbial growth and lets a single vial be used over multiple weeks. Sterile water has no preservative and should generally be reserved for single-use preparations only.
More on Selank
Medical Disclaimer
This website is for educational and informational purposes only. The information provided is not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before using any peptide or supplement.