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N-Acetyl Selank Amidate

Taken to ease anxiety

Modified Selank

This entry is the N-acetyl amidated derivative. Parent Semax/Selank studies and approval records do not establish this derivative’s efficacy, safety or approval.

Related-compound evidence; derivative applicability unresolved
AcTKPRPGPNH₂
Schematic illustration · View structure evidenceAc-TKPRPGP-NH₂
Color key
NonpolarAromaticPositive chargeNegative chargePolar Copper ion D-form or non-natural

At a glance

Why people take it. And what backs it up.

  1. Calm anxiety

    People report it, not studied

    Most take a nasal spray or small shot hoping to ease anxiety without sedation; plain Selank is approved in Russia, but not this form.

    Sources (5)

Evidence briefing

Sources checked

What the sources support.

The catalogue names N-acetyl Selank amidate, a modified product, rather than plain Selank. FDA lists Selank acetate (TP-7) as a separate bulk substance and says it lacks important safety information for administration to humans; that FDA assessment is not proof of approval or of clinical evidence for the N-acetyl amidate. A Russian-market nasal Selank product does not transfer its status to these modified forms. No FDA or EU drug approval was identified.

Keep in mind

Names and salts/terminal modifications are inconsistent in the peptide market, and clinical claims for plain Selank cannot be assumed to apply to acetate or amidated seller variants.

Identity and research status reviewRead the original sources

The research. What’s been studied.

Clinical benefit unverified

TapClick a dotted word to see what it means.

  • No verified benefit for this form

    The Selank amidate listed here has no verified clinical evidence. Findings for plain Selank cannot be assumed to apply to this modified form.

What do these labels mean?
  • Human evidence: approved-drug data or larger human studies, within the populations and uses studied.
  • Early human studies: small, preliminary or limited human studies.
  • Animal & lab studies: animal or laboratory findings that do not establish effects in people.
  • Unverified: a proposed use or claim without verified supporting clinical evidence.
How each claim was reviewed (4)

Reported effects and evidence.

A citation may support, qualify or correct a claim. Read the study scope; a laboratory result is not an established benefit in people. Each review covers a claim as it was first collected; the tiles above show the collection’s current wording.

  1. Small human parent-compound comparison; modified-form mismatch

    Review of “Less anxiety”

    Small studies compared plain Selank with benzodiazepines. Their results cannot be assigned to N-acetyl amidated Selank.

    Limitations and applicability. Entry describes N-acetyl amidate; parent comparisons do not establish equivalent efficacy or noninferiority of derivative.

    Original collected claim and review history

    Original title: Less anxiety

    Russian trials in generalized anxiety found effects comparable to a benzodiazepine.

    Original label: early. Preserved for traceability; the reviewed wording above qualifies this record.

    Record selank:benefit:1 · Annotated 2026-10-01 · Review method

  2. Limited safety reporting; unsupported absence inference

    Review of “No sedation or dependence reported”

    Short parent-Selank studies provide limited tolerability data; they cannot establish absence of sedation or dependence for the modified product.

    Limitations and applicability. No reported dependence in short studies is not proof of no dependence risk; derivative not studied.

    Original collected claim and review history

    Original title: No sedation or dependence reported

    Unlike benzodiazepines, studies didn’t report drowsiness or dependence.

    Original label: early. Preserved for traceability; the reviewed wording above qualifies this record.

    Record selank:benefit:2 · Annotated 2026-10-01 · Review method

  3. Parent Selank rodent study; modified-form mismatch

    Review of “Memory and focus”

    Plain Selank affected memory measures in rats; the finding does not establish cognitive benefit for N-acetyl amidated Selank.

    Limitations and applicability. Study used plain Selank in rat memory/alcohol-exposure models; derivative clinical benefit cannot be inferred.

    Original collected claim and review history

    Original title: Memory and focus

    Improved memory and learning in animal studies.

    Original label: animal. Preserved for traceability; the reviewed wording above qualifies this record.

    Record selank:benefit:3 · Annotated 2026-10-01 · Review method

  4. Parent-compound laboratory/small human biomarker study

    Review of “Immune balance”

    Plain Selank altered selected immune markers in laboratory and small human studies; clinical benefit and derivative applicability are unestablished.

    Limitations and applicability. Immune biomarkers are not validated “immune balance” benefits; actual modified form is not established.

    Original collected claim and review history

    Original title: Immune balance

    Influences immune signaling, reflecting its origin in the immune peptide tuftsin.

    Original label: animal. Preserved for traceability; the reviewed wording above qualifies this record.

    Record selank:benefit:4 · Annotated 2026-10-01 · Review method

The research in detail

Evidence category

Little or no published research

Small Russian studies have examined plain Selank, but the evidence is limited and does not establish effects for N-acetyl amidate or Selank acetate. FDA identifies important safety-information gaps for Selank acetate. No approval for the amidate form was verified.

Evidence is assessed claim by claim above. Regulatory approval, study design, findings and relevance are separate questions; there is no single evidence score.

Risks and unknowns. What to know first.

Collected cautions follow. These are not an exhaustive or independently validated safety assessment; claim references do not automatically support every caution.

  • Reported side effects are mild, such as fatigue and nasal irritation.
  • Independent safety data are thin.

What people report

Show all 9 cautionsShow fewer cautions

Read this first: what “research use only” means

Published dosing records. What the label abroad says.

Historical label and trial records for the named product, route, population and indication. These records are not a personal schedule or a validated regimen for a catalog vial. Source attribution does not establish applicability.

Selank 0.15%

Anxiety and stress-related problems in adults, such as unexplained worry, panic, poor sleep and trouble adapting (Russia; sold without a prescription)

Fixed courseLabel abroad

Source: Selank instruction for medical use (Russian Ministry of Health; reg. no. ЛРС-003338/09; copy posted by the maker, Peptogen) (opens in a new tab)

Days 1–14, in each nostril
2 drops
How
Drops in the nose
How often
3 times a day
How long
14 days; can be repeated after 1–3 weeks
  • This label covers plain Selank nose drops, not the N-Acetyl Selank Amidate the vendor sells. That chemically modified form is a different molecule: this label does not cover it, and no published study of it in people was found.
  • Each dose is 2 drops of the 0.15% solution (1.5 mg per mL) in each nostril. The label does not give the dose in micrograms.
  • The label says a repeat course, if needed, follows a doctor’s advice.
  • In a 2014 Russian trial of 60 people with anxiety disorders (Medvedev et al.), the 30 who took Selank alone got 2.7 mg a day for 14 days.
  • Not for people under 18, or during pregnancy or breastfeeding.

This schedule comes from the cited national product label. Authorization and availability can change: check the current local status and exact formulation. A research vial is not the labeled product.

Community protocols. Reported online. Not clinically validated.

Community reports Collection date: 30 Sep 2026

NA-Selank Amidate users most often take about 100–300 mcg by nasal spray (ready-made sprays give 100 or 200 mcg per spray) or inject about 200–750 mcg under the skin, once or twice a day or as needed.

More about this

Reports range from 100 mcg to 1,800 mcg three times a day, and many posts don’t say which form of Selank they mean.

Not testedFrequently encountered in reviewed sources

Nasal spray, about 100–300 mcg

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
About 100–300 mcg per dose (1–2 sprays of a 100 or 200 mcg spray)
How often
Once or twice a day, or as needed for stress
Route
Nasal spray
Timing
Any time; many prefer later in the day or before stressful events
Cycle
Some copy the Russian 2-week course, then a break; many simply use it as needed
Mixing
Ready-made: 10 mg or 20 mg in 10 mL (100 or 200 mcg per spray). Homemade: 10 mg vial in about 3 mL (about 300 mcg per 0.1 mL spray)
  • Several nootropic vendors sell NA-Selank Amidate sprays at 100 and 200 mcg per spray with identical product text.
  • Smarter Nootropics, an information site linked from Ceretropic’s product pages, suggested 250–500 mcg once or twice a day for Selank in general.
  • Ready-made sprays of plain Selank are weaker per spray (for example 50 mcg per spray from American Peptides), so ‘one spray’ means very different amounts.
Sources (4)

Not testedCommon

Injection under the skin, about 200–750 mcg

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
About 200–750 mcg (Dr. Seeds: 300 mcg a day)
How often
Once a day
Route
Injection under the skin
Timing
Usually morning; some say it ruins their sleep if taken in the evening
How long
Weeks to months (one user 2 months)
Ramp
Dr. Seeds: adjust by 100–250 mcg every few days
Mixing
10 mg vial + 1–3 mL bacteriostatic water
  • One user felt nothing by nose but says 750 mcg injected ‘turns off anxiety’ for about 12 hours.
  • Jay Campbell also cites 100–300 mcg once a day by injection.
Sources (4)
Show all 7 protocolsShow fewer protocols

Not testedCommon

Plain Selank 0.15% drops (Russian pharmacy product), copying the label

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
2–3 drops in each nostril (75 mcg per drop)
How often
Up to 3 times a day
Route
Nasal drops
How long
14 days
  • This is the plain form, not NA-Selank Amidate; sellers copy the Russian label, which is compiled separately.
Sources (1)

Not testedSometimes seen

Morning injection with Semax, 1 mg each

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
About 1 mg of Selank (with 1 mg of Semax); one user takes 500–750 mcg of each
How often
Once a day
Route
Injection under the skin
Timing
Morning
How long
4 weeks
Cycle
4 weeks on, 2 weeks off
Mixing
10 mg research vials
  • These users don’t say whether their vials are plain or amidate Selank.
  • One couple followed a YouTube stack by Nick Trigili but injected instead of using his nasal route.
Sources (2)

Not testedSometimes seen

High-dose nasal spray (Dr. Seeds’ book and forum reports)

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
750–1,000 mcg a day split into several sprays (Seeds); one user takes 1,800 mcg three times a day
How often
Split through the day
Route
Nasal spray
How long
Seeds: 12 weeks
Cycle
Seeds: 12 weeks on, 4 weeks off, repeated as needed
Ramp
The 1,800 mcg user worked up from 300 mcg
Mixing
One user mixed 90 mg for about 900 mcg per spray
  • Users on this plan say lower doses did little for them; others say higher doses add nothing.
Sources (3)

Not testedSometimes seen

Compounded clinic spray (plain Selank)

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
1–2 sprays of a 7,500 mcg per mL spray (spray size not stated); the same pharmacy’s chart also lists a 100 mcg-a-day injection
How often
Once a day
Route
Nasal spray
Mixing
Pharmacy-made: 3 mL nasal spray at 7,500 mcg per mL
  • This was plain Selank from the Tailor Made Compounding pharmacy (2019 catalog); Ben Greenfield’s recommended-stack page repeats it word for word.
  • At a typical 0.1 mL per spray this would be about 750 mcg per spray.
Sources (2)

Not testedSometimes seen

Evening or bedtime use, often with DSIP

Collected report · exact form and route are only as reported below. Source date and reporter identity are not separately verified. Collection checked 30 Sep 2026; presentation annotated 2026-10-01.

Frequency labels describe this collection, not a measured population. Contradictory records remain available.

Details and sourcesHide details
Dose
About 100–250 mcg
How often
As needed, or nightly
Route
Nasal spray, or injection under the skin
Timing
Evening or before bed; some pair Semax in the morning with Selank later in the day
Mixing
Some mix Selank and DSIP in one homemade spray
  • Others report the opposite: Selank in the evening ruins their sleep, or daytime use makes them want to nap.
Sources (4)

Where the numbers come from

Plain Selank is a Russian prescription drug (0.15% nasal drops, 75 mcg per drop). The N-acetyl and N-acetyl amidate versions were made by nootropic vendors (Ceretropic sold N-Acetyl Selank Amidate powder in 30 and 60 mg vials by 2015) and have never been studied in people. Community doses are borrowed from the plain drug: Smarter Nootropics, an information site linked from Ceretropic’s pages, suggested 250–500 mcg once or twice a day; Dr. William Seeds’ 2020 book gives 300 mcg a day by injection or 750–1,000 mcg by nose; and the Tailor Made Compounding pharmacy’s clinic spray (1–2 sprays a day) was repeated by Ben Greenfield. ‘Adalank’ is a newer vendor name for NA-Selank Amidate.

Home-made sprays and serums

Home-made nasal spray. Community recipes. Not tested.

Original source recordsHide

Selank is made into home-made nasal sprays the same way as Semax, usually 5–10 mg in 5–10 mL of saline, bacteriostatic water or a mix. Reported strengths are about 100–250 mcg per spray, often 1–2 sprays once or twice a day. Community practice only.

Best evidence: Approved product: Russian Selank 0.15% nose drops (1.5 mg per mL, methylparaben preservative; 2 drops per nostril 3 times a day; opened bottle 15 days at up to 25 °C) – the reference point (covered elsewhere). Home-made sprays: community only (Reddit r/Peptides, r/Nootropics), plus one compounding pharmacy strength (Tailor Made, 7,500 mcg per mL, 3 mL, 2020).

Collected strength records

Not testedNasal sprayCommon

10 mg with 1–2 mL bacteriostatic water, topped up to 10 mL with saline

Original source-specific report. Collection checked 30 Sep 2026; presentation annotated 2026-10-01. Source date and reporter identity are not separately verified. Exact form and route are limited to the source’s description.

Batch: 10 mL

Ingredients and methodHide the recipe

Ingredients

IngredientAmountRole
Selank (or Semax)10 mgActive
Bacteriostatic water1–2 mLLiquid / preservative
Nasal saline solution8–9 mLLiquid

Method

  1. Dissolve the peptide in the vial with the bacteriostatic water (1 mL per vial if mixing two peptides in one bottle).
  2. Add it to a 10 mL nasal bottle and fill with saline.
How it’s used
2 pumps a day (one poster).
Per dose
Not stated (spray volume not given).
Preservative
A small amount of bacteriostatic water ‘to inhibit the growth of bacteria’.
Keeps for
About 1 month; one poster uses bottles within 30 days.
  • A third user makes the same kind of mix with 1 mL bacteriostatic water plus 4 mL saline.
  • A long-time maker (14 years) says they have used ultrapure deionised water, saline or Xlear nasal spray as the liquid, and used bacteriostatic water only once (‘ouch’).
Sources (6)

Not testedNasal spraySometimes seen

10 mg in 6 mL (3 mL bacteriostatic water + 3 mL saline): 250 mcg per 0.15 mL spray

Original source-specific report. Collection checked 30 Sep 2026; presentation annotated 2026-10-01. Source date and reporter identity are not separately verified. Exact form and route are limited to the source’s description.

Batch: 6 mL

Ingredients and methodHide the recipe

Ingredients

IngredientAmountRole
Selank10 mgActive
Bacteriostatic water3 mLLiquid / preservative
Sterile saline3 mLLiquid
How it’s used
2 sprays a day; 6 weeks on (2 vials), then 6 weeks off.
Per dose
250 mcg per spray, with a measured spray of about 0.15 mL (stated); 40 sprays per vial.
Preservative
Bacteriostatic water (half the liquid).
Storage
Fridge (question was about fridge life).
Keeps for
Not stated; the poster was asking.
  • A reply in the same thread advised not mixing more than a week’s worth at a time because home mixing is not aseptic.
Sources (3)

Not testedNasal spraySometimes seen

10 mg in about 5 mL bacteriostatic water: about 200 mcg per 0.1 mL spray

Original source-specific report. Collection checked 30 Sep 2026; presentation annotated 2026-10-01. Source date and reporter identity are not separately verified. Exact form and route are limited to the source’s description.

Batch: about 5 mL

Ingredients and methodHide the recipe

Ingredients

IngredientAmountRole
Selank10 mgActive
Bacteriostatic waterabout 5 mLLiquid / preservative
Per dose
About 200 mcg per spray from a 0.1 mL pump (stated).
Preservative
Bacteriostatic water.
  • After mixing, the poster was told bacteriostatic water is a bad idea in the nose; replies said the burn is ‘short-lived’ or to use 0.9% saline or sterile water instead.

Not stated: how it’s used.

Sources (2)

Not testedNasal spraySometimes seen

5 mg in 6.25 mL saline: 100 mcg per 0.125 mL spray (planned)

Original source-specific report. Collection checked 30 Sep 2026; presentation annotated 2026-10-01. Source date and reporter identity are not separately verified. Exact form and route are limited to the source’s description.

Batch: 6.25 mL

Ingredients and methodHide the recipe

Ingredients

IngredientAmountRole
Selank5 mgActive
Saline6.25 mLLiquid
How it’s used
Planned: 1 spray as needed.
Per dose
100 mcg per spray, assuming 0.125 mL per spray (stated plan).
Preservative
None.
  • The poster later said they never made it because their 30 mL glass bottle sprayed inconsistently, and took it by injection instead.
  • The poster said commercial Selank sprays seemed to be 100–200 mcg per spray.
Sources (3)

Not testedOtherSometimes seen

Compounding pharmacy Selank nasal (Tailor Made Compounding, US)

Original source-specific report. Collection checked 30 Sep 2026; presentation annotated 2026-10-01. Source date and reporter identity are not separately verified. Exact form and route are limited to the source’s description.

Batch: 3 mL

Ingredients and methodHide the recipe

Ingredients

IngredientAmountRole
Selank7,500 mcg per mLActive
  • Listed as ‘Nasal’ in the January 2020 product table (doctor price $40); spray vs drops not stated.

Not stated: how it’s used and the amount per dose.

Sources (1)

Not testedNasal sprayFringe

50 mg N-acetyl Selank amidate in 20 mL: 250 mcg per 0.1 mL spray (worked example)

Original source-specific report. Collection checked 30 Sep 2026; presentation annotated 2026-10-01. Source date and reporter identity are not separately verified. Exact form and route are limited to the source’s description.

Batch: 20 mL

Ingredients and methodHide the recipe

Ingredients

IngredientAmountRole
N-acetyl Selank amidate50 mgActive
Liquid (not specified)20 mLLiquid
Per dose
250 mcg per 0.1 mL spray (stated).
  • Worked example from a reply to someone who bought a 50 mg ‘aliquot’.

Not stated: how it’s used.

Sources (1)
Editorial synthesis and reported strength comparison

This synthesized method combines source records. It has not been validated for preparation, sterility, compatibility, absorption or storage. Select a reported strength to inspect the arithmetic; no strength is selected for you.

Strength per spray

Strengths people report

  • 100 mcg per spray: 10 mg N-Acetyl Selank Amidate in 1–2 mL bacteriostatic water, topped up to 10 mL with saline nasal spray (10 mL · about 95 sprays (with a 0.1 mL pump))
  • 200 mcg per spray: 10 mg N-Acetyl Selank Amidate in 5 mL bacteriostatic water (5 mL · about 45 sprays)
What people report
Research notes

Form confusion: most published protocols and all clinic products concern plain Selank; data specific to NA-Selank Amidate come from a handful of Reddit and forum threads. ‘Adalank’ is a marketing name for NA-Selank Amidate. Reports conflict on timing (calming at bedtime versus ruining sleep) and on dose (100–300 mcg ‘best’ versus nothing until 750 mcg, and one user at 1,800 mcg three times a day). The clinic spray’s amount per spray is not stated. Selank was not among the peptides reviewed by the FDA advisory committee in July 2026. One 2023 Reddit user describes a strong reaction to a first 200 mcg nasal dose of the amidate (possibly from uneven mixing).

Nasal spray

Shelf-life claims conflict: ‘about 7 to 10 days’ in the fridge with sterile water and ‘3 or 4 weeks’ with bacteriostatic water (one user), ‘about 1 month’ (another), ‘Stable for up to 40 days’ (another); none cite data. The same user who gave those shelf lives claimed bacteriostatic water is ‘well below anything irritating’, which contradicts many other users. Official Selank drops allow only 15 days after opening.

What it is. In plain English.

The listed N-acetyl Selank amidate is a modified seller product; studies and Russian product status for plain Selank do not establish its effects or approval.

This entry names N-acetyl Selank amidate, a modified form distinct from plain Selank and Selank acetate. Human research or any national product status for plain Selank does not establish the identity, clinical effects or approval of this amidate form.

Plain Selank has been studied for anxiety and other neuroactive effects, but proposed mechanisms and evidence are limited. This entry is the N-acetyl amidate form, and findings for plain Selank do not establish the same effects for it.

Reviewed 2026-10-01.

Structure. Nothing to show yet.

No experimental 3D structure of Selank or N-acetyl Selank amidate is in the .

Tuftsin (TKPR), its first four amino acids, appears in two entries, bound to a neuropilin and to a bacterial protein, but neither is Selank or a target of Selank.

Checked 30 Sep 2026.

Specs. The facts at a glance.

Length
7 amino acids
Sequence
Ac-TKPRPGP-NH₂
Sold as
  • N-Acetyl Selank Amidate 10 mg
In blends
Regulatory status
No FDA or EU approval was identified for N-acetyl Selank amidate. Any Russian nasal Selank product is a separate form; its status does not extend to this modified seller product. FDA has noted safety-information gaps for Selank acetate.
Also known as
Modified Selank

Sources. What this page rests on.

Every source behind this page, with what it says and when it was checked, is in the Source library.

N-Acetyl Selank Amidate in the Source library

Original overview and research notes · annotated 2026-10-01

Historical collection text. Read alongside the claim corrections above; identity or evidence qualifications may supersede this wording.

Calm without sedation

A Russian anti-anxiety peptide, sold here in a modified form.

A synthetic analog of tuftsin, a small immune peptide, extended with Pro-Gly-Pro for stability. The N-acetyl amidate form has capped ends and hasn’t been clinically studied.

It appears to enhance GABA signaling (the calming system benzodiazepines act on, through a different route), slows the breakdown of enkephalins (natural painkillers), and influences BDNF and immune signaling.

Russian trials in generalized anxiety reported effects comparable to a benzodiazepine without sedation or dependence. The studies are small and haven’t been replicated in the West.

Original status record: Approved in Russia as nasal drops for anxiety, but that product is plain Selank, not this N-acetyl amidate form. Not approved in the US or EU.

More in Brain, mood & sleep.

Glossary

Acetylation / amidation

Chemical caps (Ac, NH₂) added to a peptide’s ends to slow its breakdown. “N-acetyl ... amidate” means both ends are capped.

Glossary

Protein Data Bank (PDB)

The free worldwide archive of 3D structures of proteins and other molecules measured in experiments. Each entry has a four-character code, like 7KI0.