Selank

weak data

Also seen as: NA-Selank

The Dose Guy’s verdict

Aug 29, 2026
3 sources

Selank is the gentle option on this shelf, a peptide nasal spray that takes the edge off without sedation or dependence. The effect is subtle, more like a baseline shift than a switch flip. Russian clinical data says it works about as well as a mild benzodiazepine for generalized anxiety, but those are small trials in Russian journals, and the Western evidence base is nearly empty. If you want something low-risk to try alongside bigger changes, selank is reasonable. If you want to actually feel a difference on a hard day, pregabalin or propranolol will get there and selank probably won’t.

Would I take it?Low stakes, but set expectations low.

What it is

Selank is a synthetic heptapeptide built on tuftsin, a fragment of immunoglobulin G that the body already makes. The Russian lab that developed it, the Institute of Molecular Genetics, extended tuftsin’s sequence to make it last longer in the blood and added an anxiolytic effect. The mechanism touches several systems at once: in a radioligand binding study it acted as a positive allosteric modulator at GABA receptors, it slows the breakdown of enkephalins, your endogenous opioid-calming peptides, and in human brain imaging it shifts connectivity in the amygdala. That is a dish and an imaging scan, not a proven pathway in a person, which tracks with the clinical picture: real but modest.

You run it as a nasal spray, usually as the NA-Selank amidate form, which is more stable. It sits in the same Russian anxiolytic-peptide family as semax, but semax is more stimulating and cognitive while selank is more calming. Neither is approved or widely studied outside Russia.

What the research shows

Small Russian clinical trials, no Western replication, and no modern RCT by international standards. That is the whole base:

In 62 patients with generalized anxiety or neurasthenia, selank and medazepam, a mild benzodiazepine, produced similar anxiolytic effects. Selank also produced antiasthenic and psychostimulant effects.Korsakov J 2008 · comparison · n=62

Adding selank to phenazepam in 70 anxiety patients sped up the phenazepam benefit and reduced its side effects, including sedation, memory impairment, and emotional blunting.Korsakov J 2015 · RCT · n=70

In 52 healthy participants, selank altered resting-state functional connectivity between the amygdala and temporal cortex within 20 minutes of a single dose. A real brain signal, but in healthy people, not patients.Doklady 2020 · fMRI · n=52

No Western RCT, no dose-finding trial by modern standards, and no long-term safety study exist. The entire human dataset is a handful of small Russian studies.as of Aug 2026

Realistic protocols

Selank is run intranasally, typically as the NA-Selank amidate. The community dose is 200 to 600 mcg per day, split across two or three sprays. Most people start at the low end and stay there because the effect is subtle enough that chasing higher doses rarely changes the experience. You can run it daily for a few weeks or use it as-needed on days you want a calmer baseline.

Western selank is grey-market powder or a spray of unknown provenance. Require a third-party COA before you order anything; without one you do not know what is in the vial.

There is no hard cycling requirement. Peptides degrade, so tolerance in the traditional sense is less of a concern than with the GABAergic compounds. If you stop noticing it after a few weeks, take a week off and reassess whether it was doing anything. Honest answer for many people: it wasn’t, and that is fine. It is a low-stakes experiment. Run it in the morning or early afternoon, not before bed, and it pairs fine with propranolol for an event day if you want the physical side covered too.

Start200 mcg/dayIntranasal, one or two sprays. See if you notice a baseline shift.

Working range200–600 mcg/daySplit across morning and afternoon. Most people stay at the low end.

Duration2–4 weeksRun a course, then reassess. Take a break if the effect fades.

Ceiling600 mcg/dayMore than this rarely adds anything. The effect is subtle by nature.

Side effects

Selank has one of the mildest side-effect profiles on this shelf, which tracks with a subtle compound:

anecdotalMild nasal irritation from the spray, especially with repeated daily use. Rotate nostrils.

anecdotalSlight drowsiness or a calming heaviness, reported by some at higher doses. Not sedation in the baclofen or pregabalin sense, more like a quiet afternoon feeling.

anecdotalOccasional headache, usually mild and short-lived.

unknownNo long-term human safety data exists in any language. The trials are small, short, and old. Low-risk on paper is not the same as studied for years.