Quick answer: the only licensed form of Selank is a 0.15% nasal drop sold over the counter in Russia for anxiety, panic attacks and stress-related sleep problems.[1] A Selank nasal spray sold in the US is an unapproved product. The evidence for Selank comes from small Russian trials of 70 patients or fewer, with no placebo group,[3][5] and FDA says important human safety information is missing.[9]
This page covers how the licensed drops differ from sprays sold online, why Selank is given through the nose, what the trials found and the main safety points. For Selank’s full research, see our Selank profile and the nootropic peptides hub.
Nasal drops vs nasal spray
| Licensed Russian Selank | Selank “nasal spray” sold online | |
|---|---|---|
| Form | 0.15% drops in a 3 mL bottle with pipette or dropper cap[2] | Spray bottles of varying strength |
| Strength | 1.5 mg per mL[2] | Not verified |
| Status | Over-the-counter medicine in Russia, adults only[2] | Not FDA-approved[9] |
| Studied in people? | Yes, small Russian trials[3] | No studies of these products |
A metered spray behaves differently from drops. FDA, in its 2026 review of the sister peptide Semax, explained that for a nasal spray the bottle and pump control the amount per spray, how evenly the drug is distributed and the droplet size, and that no information existed on the devices used for compounded peptide sprays.[10] FDA did not review Selank in 2026, but the same questions apply to any unlicensed Selank spray.
What Selank nasal drops are used for
The Russian label lists these uses for adults:[1][2]
- anxiety without a clear cause, restlessness and panic attacks
- nervous exhaustion (neurasthenia) and fatigue (asthenia)
- unstable mood and stress-related sleep problems
- low drive, indecision and lack of self-confidence
- adjustment disorders, and preventing and treating stress-related disorders
The label also claims benefits for memory, attention and learning.[1] Those claims rest on the manufacturer’s data rather than independent trials.
Why it’s given through the nose
Selank is a 7-amino-acid peptide based on tuftsin, a natural immune peptide.[1] The manufacturer reports:[1][2]
- 92.8% absorption through the nasal lining
- appearance in the blood within 30 seconds
- blood levels falling over about 5 to 5.5 minutes
- entry into brain tissue, with fast breakdown by tissue enzymes and nothing detectable in 24-hour urine
No independent human pharmacokinetic study has been published. The label also notes that a runny or congested nose reduces absorption, so the nose should be cleared first, and that drops reaching the throat leave an unpleasant taste and are wasted.[2]
How the licensed drops are meant to be used
The Russian instructions describe a specific technique:[2]
- sit with the head tilted slightly back or to one side
- place the drops on a clean nasal lining, then press each nostril closed with a finger for a moment
- if the bottle has a screw cap, swap it for the supplied pipette before first use
- keep unopened bottles at 2 to 8 °C; once opened, a bottle can be kept at up to 25 °C for no more than 15 days
A spray bypasses most of these steps, but it also means the dose depends on a pump nobody has tested. Even though Selank leaves the blood within minutes, one trial found its anti-anxiety effect lasted about a week after the last dose.[4]
For how nasal delivery of peptides compares with injections in general, see peptide nasal spray vs injection.
What the human studies found
| Study | People | Result |
|---|---|---|
| Selank vs medazepam, 2008 | 62 with generalized anxiety or neurasthenia (30 Selank, 32 medazepam) | Similar anxiety relief; Selank also reduced fatigue[3] |
| Selank vs phenazepam, 2014 | 60 with anxiety and somatoform disorders | Clear anxiety relief lasting about a week after stopping[4] |
| Phenazepam with or without Selank, 2015 | 70 (40 add-on, 30 phenazepam alone) | Faster response; less sedation, memory and sexual side effects[5] |
| Brain scans, 2020 | 52 healthy volunteers (Selank, Semax or placebo) | Changes in amygdala connectivity within 20 minutes[6] |
In lab tests on brain membranes, Selank acted on GABA receptor binding, the system benzodiazepines act on.[7]
For the label dose and what it works out to per drop, see Selank dosage. For how it ranks against other options, see best peptides for anxiety.
Side effects and who should avoid it
- Label side effects: allergic reactions, including delayed reactions (the preservative can also cause them), and an unpleasant taste when drops reach the throat.[2]
- Not for: pregnancy, breastfeeding, anyone under 18 and anyone allergic to Selank.[1]
- Sedatives: a US review warned that GABA-acting sedatives taken in high doses or with other sedatives have caused dangerous breathing problems. It did not report such cases with Selank, but anyone on sleep aids or benzodiazepines should ask a clinician first.[8]
- Driving: the manufacturer states Selank does not affect the ability to drive.[2]
Online sprays and Semax combinations
FDA found US websites selling “50:50” Semax and Selank combinations as nasal sprays and injections.[10] Belgian regulators found both peptides in seized unlabeled products and noted they are sold online as powders for injection or in nasal sprays. The Belgian lab had to develop a new testing method so that it could identify these peptides, and it used that method to screen 10 supposed cognitive-enhancing peptides being sold online.[11] No clinical trial has tested Selank and Semax together. The Semax label lists disorders accompanied by anxiety as a contraindication,[12] which matters for people buying a combination to treat anxiety. Read more in Selank vs Semax and Semax nasal spray.
Is Selank nasal spray legal?
- Russia: over-the-counter medicine for adults.[2]
- US: not FDA-approved. FDA lists selank acetate among bulk substances whose compounding nominations were withdrawn, citing possible immune reactions from clumping and impurities and a lack of important human safety information.[9]
This is general information, not legal advice. For the wider regulatory picture, see the FDA peptide ban in 2026.
Questions to ask your clinician
- Is my anxiety being treated with options that have stronger evidence, such as therapy or approved medicines?
- Could Selank interact with anything I take, especially sedatives or sleep aids?
- If a product is a spray rather than the licensed drops, how would we know the dose per spray?
- How long should I try it before deciding whether it helps?
