Peptides
Selank
Also called Selank
Selank is usually considered for feeling calmer without losing daytime focus. That makes it different from the more performance-focused interest in Semax. A small anxiety study is encouraging, but it does not establish a guaranteed response, a risk-free alternative to anxiety medicines or a safe way to stop an existing prescription.
Dosage & duration
Named 0.15% nasal-drop product instructions
Extrapharma-hosted Selank instruction
Reported use · unapproved regimen- Dose
- 2 drops into each nostril
- How often
- 3 times daily, intranasal
- How long
- 14 days
Product-specific count; a spray is not automatically equivalent to a drop. No injection conversion implied.
Sources: 2
A published course does not establish indefinite use, withdrawal prevention or a schedule for changing other medication.
Why people consider Selank
Calmer and still clear-headed
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Less anxiety
The hoped-for change is less worry and avoidance in everyday situations.
-
Keep the day working
Readers want to work, study and interact comfortably while feeling calmer.
Why do people choose Selank?
The appeal is less anxiety while staying clear-headed. That is a more useful question than whether it raises a brain chemical. In the small clinical comparison, participants had anxiety-related diagnoses; the result does not guarantee how a healthy nootropic user will feel.
Selank or Semax?
Selank is mainly discussed for calm and anxiety; Semax for attention and mental stamina. They are different peptides, and combining them does not establish better results. A calm feeling, better concentration and improved sleep should be judged separately.
Drops, sprays and cycles
The visible example belongs to a particular nasal-drop instruction. Keep concentration, device and amount together. A fourteen-day course does not prove that repeated cycles remain effective or that a modified Selank derivative has the same profile.
Medication changes need their own plan
Do not read “non-sedating” or “no withdrawal” marketing as permission to stop a prescribed anxiety medicine. Persistent anxiety or worsening mood deserves treatment review, including any peptide product being used.
Model details: Selank · relative timing
Compare timing and buildup for this compound. The values are not blood concentrations or a measure of strength.
Shows a relative timing scenario; absolute blood concentrations are not calibrated.
Timing assumptions and sources
Legacy 0.48 h is unverified; enkephalin half-life is explicitly a different molecule.
One 1 mg input peaks at 1 relative unit after a single dose. Other amounts scale proportionally; overlapping doses add when accumulation is on. Different compounds use separate relative scales.
- Timing half-life used
- 0.48 hours
- Absorption half-life assumed
- 0.12 hours
- Reference amount for the relative scale
- 1 mg
- Absorption half-life is assumed to be one quarter of the slower timescale (0.12 h); it is not a measured absorption parameter.
- A single 1-unit input has a peak of 1 relative unit; scaling and repeated-dose addition are mathematical assumptions. This normalization is independent of the example dose.
- Do not interpret inhibited leu-enkephalin degradation as Selank elimination.
- Intranasal rat brain distribution does not calibrate human SC plasma.
- [Efficacy and possible mechanisms of action of a new peptide anxiolytic selank in the therapy of generalized anxiety disorders and neurasthenia].
Legacy 0.48 h is unverified; enkephalin half-life is explicitly a different molecule.
- Shevchenko et al.2006, labeled peptide biodegradation
Identified Selank metabolites; rat brain intranasal work, no human calibration in inspected abstract.
- Selank enkephalin-degradation experiment
Half-life is that of leu-enkephalin, not Selank.
selank-relative-timing-2026-10 · version 1
Common questions
Is Selank a replacement for anxiety medication?
The small comparative study does not establish a universal substitute or a safe medication-switching plan. Any change to prescribed treatment needs its own clinical discussion.
Can I use Semax and Selank as one dose?
They are separate compounds. A combined amount does not identify how much of each is present, and combination benefits are not established by their separate studies.
Sources Labels, studies and notes behind this guide
Catalog evidence: Other human research. This describes the type of evidence, not a clinical review of every claim.
Summary and fact source checks: 2026-10-07. This records source checking, not medical review of the whole page.
Notes on the quick facts
- Main goal
- This is the hoped-for experience, not a guarantee.
- Compared with Semax
- Semax is more often discussed for focus and mental stamina.
- Product detail
- A different spray pump or concentration changes the amount.
- 1. Zozulia et al.: Selank anxiety study
Original abstract/search inspected: 62 people with generalized anxiety/neurasthenia, active comparison with medazepam; limited study, not all healthy users.
- 2. Extrapharma Selank 0.15% instructions
Supplier-hosted product instructions inspected: 2 drops each nostril three times daily, 14 days. Product-specific example, not generic spray conversion.
- 3. [Efficacy and possible mechanisms of action of a new peptide anxiolytic selank in the therapy of generalized anxiety disorders and neurasthenia].
Legacy 0.48 h is unverified; enkephalin half-life is explicitly a different molecule.
- 4. Shevchenko et al.2006, labeled peptide biodegradation
Identified Selank metabolites; rat brain intranasal work, no human calibration in inspected abstract.
- 5. Selank enkephalin-degradation experiment
Half-life is that of leu-enkephalin, not Selank.
- 6. Volkova et al. 2016 — Selank gene-expression experiment
Animal GABAergic gene-expression work; mechanistic evidence, not clinical proof of benzodiazepine-like action without risks.
Related compounds and examples
Related compounds
Semax
Semax for focus and mental fatigue: nasal-drop examples, concentration differences and realistic expectations for everyday nootropic use.
Adamax
Adamax versus Semax: focus and motivation claims, a named reported-dose example and the uncertainty behind “stronger” nootropic marketing.
Cerebrolysin
Cerebrolysin for cognition and recovery questions: clinical dose context, why milliliters matter and how nootropic goals differ from stroke research.