Anxiety · Guide
Selank: Calm Without the Sedation, and What the Trials Actually Found
A peptide that matched a benzodiazepine for anxiety in Russian trials, without the grogginess and without the dependence. The catch is where the evidence comes from.
Razumna editorial · 6 min read · Updated June 2026
The short answer
Selank is a tuftsin-derived peptide taken as nasal drops. It modulates the GABAergic system, raises the body's own enkephalins, and upregulates BDNF, which is why it produces calm without the sedation or dependence of a benzodiazepine. In Russian trials it matched the anxiolytic effect of medazepam without the grogginess. The honest limit: most of that evidence is Soviet and Russian and concentrated in anxious patients, not large Western trials in healthy people.
What it is and how it works
Selank is a synthetic heptapeptide derived from tuftsin. Rather than occupying a receptor the way a benzodiazepine does, it works upstream: it modulates GABAergic tone, inhibits the enzymes that break down your own enkephalins so more stay in circulation, and raises BDNF. Its plasma half-life is only minutes, but because it acts by shifting gene expression, a single intranasal dose raised BDNF mRNA within 3 hours and protein within 24 hours in rat hippocampus (Inozemtseva et al., 2008), and the felt effect builds over a course and persists for roughly a week.
What the trials found
The strongest human data is a comparison against medazepam, a benzodiazepine, in generalized anxiety and neurasthenia. Selank matched the anxiolytic effect without the sedation, muscle slackening, or grogginess (Zozulia et al., 2008). No tolerance buildup or withdrawal syndrome has been documented, which is the main reason people reach for it over a benzodiazepine.
Dosing
The 0.15% solution delivers roughly 75 micrograms per drop. The generalized-anxiety trial used about 450 micrograms 3 times a day, which works out to roughly 2 to 3 drops per nostril, spread across the day rather than loaded at once. Start at the low end and assess. Selank is not sedating, but many users keep the last dose away from bedtime out of habit.
The honest limits
The human evidence base is Soviet and Russian-weighted and concentrated in anxious patients, so cognitive-enhancement claims for healthy users are thin. It is not approved by the FDA or EMA and is not a treatment for any diagnosed anxiety disorder or a substitute for prescribed medication. Do not stack it with benzodiazepines or alcohol. It pairs naturally with Semax for focus plus calm, covered in the Semax vs Selank comparison. This is information, not medical advice.
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Common questions
Is Selank addictive like a benzodiazepine?
No tolerance buildup or withdrawal syndrome has been documented in the clinical literature. That is the main reason people choose it over a benzodiazepine. It is not a controlled substance in the same way.
Will it make me drowsy?
Sedation is the thing Selank is specifically known for not causing. In Russian trials it matched a benzodiazepine's anxiolytic effect without the grogginess or muscle slackening.
How long until it works?
It builds over a course rather than from a single dose. The gene-expression mechanism means effects accumulate over days and persist for roughly a week.
Sources
- Zozulia et al. Selank vs medazepam in generalized anxiety and neurasthenia, 2008 (PMID 18454096)
- Volkova et al. Selank and GABAergic gene expression. Frontiers in Pharmacology 2016
- Inozemtseva et al. Intranasal Selank regulates BDNF in rat hippocampus, 2008
This article is information, not medical advice. Razumna does not name compounds as treatments for any condition.
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