Selank Dosing: Nootropic Protocols & Administration

Selank hits fast, under 15 minutes

Users commonly report Selank onset within minutes, though no published human pharmacokinetic study has quantified intranasal onset time. You feel calmer without the fog, which is why it shows up so often in stress and cognition studies. Selank is a tuftsin-derived heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) (Volkova 2016, Front Pharmacol, PMID 26924987). Vials usually come in 10 mg or 20 mg, going by supplier packaging. How you reconstitute depends on whether you plan to go nasal or inject.

Selank is not FDA-approved. It has been approved only in the Russian Federation, since around 2009, and this guide is for research use only. Below I cover dosing for both routes, cycles, and storage. Most of the numbers here are community and protocol conventions rather than study-derived figures, and I've flagged the exceptions inline. The BDNF findings come from rodent work (rat, intranasal), not human trials (Inozemtseva 2008, Doklady Biological Sciences, PMID 18841804).

Reconstitute for nasal spray

Take a 10 mg vial and add 10 ml of bacteriostatic water. That gives you 1 mg/ml, or 1000 mcg/ml.

Shake it gently for 2-3 minutes until it dissolves, then pull 9 ml into a sterile nasal spray bottle.

Each spray is roughly 0.1 ml: 100 mcg.

That's 90 sprays at 100 mcg each. For 300 mcg, do 3 sprays total, alternating nostrils. Intranasal absorption gets estimated around 50%, but that number is community-derived and has never been measured for Selank specifically, and peptide intranasal bioavailability swings a lot with the formulation. Prime with 2 test sprays first.

Want it stronger? Use 5 ml of water instead. That doubles things to 2000 mcg/ml, or 200 mcg per spray, so 1-2 sprays per nostril gets you to 300 mcg effective. Plug your vial into the Selank calculator for the exact math.

SubQ injection protocol

10 mg vial, 2 ml water. 500 mcg per 0.1 ml.

Daily from research:

• Morning: 300 mcg (0.06 ml)
• Afternoon: 300 mcg (0.06 ml)
• Evening optional: 150 mcg (0.03 ml) for sleep checks

0.5 ml insulin syringe. Pinch abdomen skin, 45-degree angle, slow push. Switch spots daily.

Community reports suggest SubQ peaks slower, around 30-45 minutes, with an effect window lasting up to 6 hours. Take that loosely: Selank's plasma half-life is reported in minutes, and these route-specific timings aren't quantified in the primary literature. Worth noting that the Russian clinical trials used intranasal dosing, not subcutaneous injection. Keep your total under 900 mcg daily, which lines up with the ~900 mcg/day (300 mcg x3 intranasal) used in the Russian GAD trial (Zozulya 2008, Zh Nevrol Psikhiatr Im S S Korsakova, PMID 18454096). The "no tolerance" claim you'll see floating around is community-reported and unverified.

See DSIP for sleep or Semax for focus stacks.

Nasal or injection, which to pick?

Nasal dominates research use. The olfactory route is proposed to cross the blood-brain barrier, and nose-to-brain transit is hypothesized for Selank via its PGP motif, though nobody has demonstrated it quantitatively. Community protocols use 200-400 mcg, 2-3 times a day. The 300 mcg intranasal three-times-daily regimen is the dose from the Russian GAD trial (Zozulya 2008, Zh Nevrol Psikhiatr Im S S Korsakova, PMID 18454096).

The onset and duration figures above are community and protocol conventions, not measured pharmacokinetic values. No primary human PK study has characterized Selank's intranasal or subcutaneous onset and effect duration. Nasal bioavailability gets estimated at 40-60%, but again, that's a community estimate, not something measured for Selank. On a 100 mcg spray, that's 3 total (1.5 per nostril). Subcutaneous bioavailability is usually high for small peptides, though it hasn't been measured for Selank, and then there's the matter of needles.

I lean nasal because it's easier. One protocol I've seen: 300 mcg at 8 AM, 2 PM, and 6 PM for 12 days.

Cycles for cognition studies

Don't run it forever. Cycle it so it keeps working.

Beginner (anxiety):

• Days 1-10: 300 mcg nasal, morning + afternoon
• 11-17 off
• Up to 3 rounds

Advanced stack:

• 1-14: Selank 300 mcg nasal 3x + Semax 400 mcg nasal 2x
• 15-21 off
• Test cognition for BDNF changes (note: Selank's effect on BDNF expression has been demonstrated only in rats via intranasal administration, not in humans — Inozemtseva 2008, Doklady Biological Sciences, PMID 18841804)

That works out to 8-12 mg total per 14-day cycle, which is just protocol arithmetic, not a study-derived figure. Stacking GHK-Cu? Community protocols cut Selank to 200 mcg, though no published interaction or combination data backs that up.

Take a week off every two. Some community users push 20 on, 10 off for memory and report diminishing returns after 14 days, but that's anecdotal with no primary source.

Storage that works

The figures below follow general lyophilized-peptide handling convention; there is no Selank-specific stability study.

Dry powder? Room temp under 25 C, generally considered good around 2 years.

Reconstituted:

• Fridge 2-8 C: 4 weeks
• Freezer -20 C: 6 months (thaw once)

Heat and time degrade reconstituted peptides, so keep it cold. There's no published Selank stability data putting a number on a specific weekly potency drop. Keeping nasal solution past 2 weeks? Add 0.9% benzyl alcohol. Freeze 1 ml aliquots.

For travel, ziplock the lyophilized powder with silica and mix on arrival.

Stacking combos

Selank stacks well with most things.

Selank + Semax:

• Selank 300 mcg nasal 3x
• Semax 300 mcg nasal 2x
• 10 on/7 off
• Lower anxiety, better memory

Selank + Ipamorelin (sleep-cognition):

• Selank 200 mcg nasal evening
• Ipamorelin 200 mcg subQ bed (Ipamorelin calculator)

Skip sedatives. Community users pair it with PT-141 for social stress. All of these stacking combinations are community-reported, and no published combination or safety data exist for any of these pairings.

Community guidance keeps total peptides under 1 mg daily.

Fix common problems

Nasal burn: dilute to 500 mcg/ml, swap nostrils, and rinse with saline after.

No kick: recheck your math and scale up if you can. Try 400 mcg, 600 daily at most.

Headache: drop to 150 mcg 2x and drink more water.

Tolerance: 7 days off fixes it.

Community advanced protocols

The schemes below are community protocols, not study-derived. No published study describes microdosing, loading, or pre-exam pulse protocols for Selank.

Microdose: 100 mcg nasal every 4 hours, up to 500 daily, for steady calm.

Load: days 1-3 at 500 mcg 3x, then 250 mcg 2x.

Pulse: 400 mcg 30 min before an exam.

The intranasal 300 mcg three-times-daily regimen mirrors the dose used in the Russian GAD trial (Zozulya 2008, Zh Nevrol Psikhiatr Im S S Korsakova, PMID 18454096); other schemes here are community protocols, not clinical doses.

Track your results

Log:

• Anxiety 1-10 daily
• Digit span test before/after 15 min
• Reaction time app

Some community users report a noticeable stress drop within the first week, but that's anecdotal and not from any published trial. In the Russian GAD trial, Selank's anxiolytic efficacy was comparable to the benzodiazepine medazepam (62 patients: 30 selank vs 32 medazepam) over roughly 14 days, with added antiasthenic and psychostimulant effects and without the sedation you get from benzodiazepines (Zozulya 2008, Zh Nevrol Psikhiatr Im S S Korsakova, PMID 18454096). The anxiolytic mechanism is thought to run through GABAergic modulation (Volkova 2016, Front Pharmacol, PMID 26924987) and inhibition of enkephalin-degrading enzymes (Zozulya 2001, Bull Exp Biol Med, PMID 11550013). Use the Selank calculator.

FAQs

Question: What is the standard selank dosing for nasal administration in cognitive research?
Answer: You typically dose 300 mcg of Selank nasally, 2 to 3 times per day. Use 1 to 2 sprays per nostril depending on your spray concentration.

Question: How do you reconstitute Selank for subcutaneous injection?
Answer: Add 2 ml of bacteriostatic water to a 10 mg vial of Selank. This gives you 500 mcg per 0.1 ml. Draw up 0.06 ml for a 300 mcg dose.

Question: What cycle length do researchers use for Selank protocols?
Answer: Run Selank for 10 to 14 days, followed by 7 to 10 days off. Repeat as needed for cognitive enhancement studies.

Question: How should you store reconstituted Selank?
Answer: Keep lyophilized Selank at room temperature. Once reconstituted, store in the fridge at 2 to 8 C and use within 4 weeks.

Question: Can you combine Selank with Semax in nootropic research?
Answer: Yes, researchers often stack Selank at 300 mcg nasal with Semax at 300 to 600 mcg nasal, both 2 times daily. Check our Semax calculator for precise dosing.

This information is for educational and research purposes only. Consult a healthcare professional before using any peptides. Dosingcalc.com does not endorse human consumption of research chemicals.

References

1. Zozulya AA, Neznamov GG, Syunyakov TS, et al. "Efficacy and possible mechanisms of action of a new peptide anxiolytic selank in the therapy of generalized anxiety disorders and neurasthenia." Zh Nevrol Psikhiatr Im S S Korsakova, 2008;108(4):38-48. PubMed
2. Inozemtseva LS, Karpenko EA, Dolotov OV, et al. "Intranasal administration of the peptide Selank regulates BDNF expression in the rat hippocampus in vivo." Doklady Biological Sciences, 2008. PubMed
3. Volkova A, Shadrina M, Kolomin T, et al. "Selank Administration Affects the Expression of Some Genes Involved in GABAergic Neurotransmission." Front Pharmacol, 2016. PubMed
4. Zozulya AA, Kost NV, Sokolov OY, et al. "The inhibitory effect of Selank on enkephalin-degrading enzymes as a possible mechanism of its anxiolytic activity." Bull Exp Biol Med, 2001. PubMed