Selank (Tuftsin Analog, Thr-Lys-Pro-Arg-Pro-Gly-Pro)
A synthetic analog of the immune peptide tuftsin, approved in Russia as an anxiolytic and nootropic. Modulates GABA receptors, reduces anxiety without sedation, and enhances memory and learning. Administered intranasally.
Selank calms your brain by enhancing GABA -- the same calming neurotransmitter targeted by medications like Xanax and Valium. But unlike those drugs, Selank doesn't make you drowsy, foggy, or dependent. It works alongside your brain's natural calming system rather than overriding it. It also boosts your brain's natural painkillers (enkephalins) and helps regulate serotonin, which improves both mood and cognitive function. The result: reduced anxiety with IMPROVED (not impaired) mental clarity.
Primary use case. GABA-A positive allosteric modulation without sedation or dependence. Approved anxiolytic in Russia. Clean alternative to benzodiazepines.
Enhances memory and learning while reducing anxiety-related cognitive impairment. Modulates serotonin and enkephalin systems that support cognitive function.
Anxiolytic + serotonergic + enkephalinergic effects improve overall mood. Antidepressant-like effects reported in animal models.
Tuftsin-derived immunomodulatory activity. Enhances monocyte and NK cell function.
Anxiety reduction can improve sleep quality. GABAergic effects without sedation. Some users report better sleep onset.
Neuroprotective effects contribute to brain aging prevention indirectly.
Not relevant.
Not relevant.
Selank acts as a positive allosteric modulator of GABA-A receptors, enhancing GABAergic inhibitory transmission without directly binding the benzodiazepine site. This produces anxiolysis without sedation or dependence. Additionally: (1) Modulates serotonin metabolism by influencing the expression of genes encoding 5-HT receptors and serotonin transporters. (2) Increases brain enkephalin levels, contributing to anxiolytic and analgesic effects. (3) Stabilizes enkephalin degradation, prolonging endogenous opioid signaling. (4) Immunomodulatory effects via tuftsin-derived activity on monocytes and natural killer cells. (5) Influences expression of 36+ genes related to GABA and serotonin systems in hippocampus.
Russian approved protocol. 0.15% solution = approximately 75mcg per drop. Can be used as-needed for acute anxiety or as a daily protocol for sustained effect. Unlike benzodiazepines, no tolerance or withdrawal reported.
The classic Russian nootropic peptide stack. Semax for BDNF/dopamine/cognition, Selank for GABA/anxiety/memory. Complementary and synergistic. Some users alternate sprays in the same session.
Acetylated version with improved stability and bioavailability. Reported as more potent per dose than standard Selank.
Usually resolves as GABA system adjusts
Selank has an extremely clean side effect profile. KEY ADVANTAGE OVER BENZODIAZEPINES: no sedation, no cognitive impairment, no dependence, no withdrawal syndrome, no tolerance buildup. Multiple Russian clinical studies confirm this. The lack of dependence/withdrawal is the single most important differentiator from traditional anxiolytics. It can be stopped abruptly without rebound anxiety.
No safety data in pregnancy.
Both modulate GABA-A receptors. Concurrent use may potentiate GABAergic effects. Not necessarily contraindicated but requires awareness. Some Russian protocols use Selank to assist benzodiazepine tapering.
Alcohol also acts on GABA-A receptors. Combined GABAergic modulation.
Selank has immunomodulatory effects via tuftsin activity. May influence immune function in autoimmune patients.
Positive allosteric modulation of GABA-A receptors. Enhances GABAergic transmission. PMID 30255741.
Modulates serotonin receptor expression and transporter genes.
Increases brain enkephalin levels and stabilizes degradation.
Immunomodulatory effects via tuftsin-derived mechanism.
Indirect -- anxiety reduction may lower stress-driven cortisol elevation.
THE classic nootropic peptide stack. Semax for cognitive enhancement (BDNF/dopamine), Selank for anxiety reduction (GABA/serotonin). Different mechanisms, complementary effects. Both intranasal. Used together in Russian clinical practice.
BPC-157 modulates dopamine/serotonin and has neuroprotective effects. Potentially complementary.
Different mechanisms. No known interactions.
Studied together in Russian clinical settings. Complementary neuroprotective approaches.
No known interactions.
Vyunova TV, et al. - Protein Pept Lett (2018) - Mechanistic study
Selank acts as a positive allosteric modulator of GABA-A receptors. Joint action with benzodiazepines regulates GABA binding in specific, non-cumulative manner. Establishes molecular basis for anxiolytic activity.
Limitations: In vitro binding study.
Czabak-Garbacz R, et al. - Pharmacol Rep (2006) - Animal study
Tuftsin analog (Selank-related) improves learning and memorization, causes antidepressant and anxiolytic effects. Potential as anxioselective, fast-acting drug.
Limitations: Animal study. Tuftsin analog, not Selank specifically.
Selank is popular in the nootropic community as a non-addictive anxiolytic. r/Nootropics consensus: subtle but real anxiety reduction without the fog of benzodiazepines. Most commonly paired with Semax. Users describe it as 'taking the edge off' anxiety while maintaining or improving cognitive sharpness. Commonly sourced from Cosmic Nootropic (Russian import) or peptide research vendors. Cost: $30-60 for a 30-day supply of nasal spray. Community advice: the N-Acetyl variant is more potent. Can be used as-needed (like taking a Xanax but without the downsides) or as a daily protocol. No reports of dependency or withdrawal even after months of daily use. Some users report enhanced social confidence and reduced social anxiety. IMPORTANT FOR OWEN: Selank addresses the anxiety component directly while Semax addresses cognition -- together they cover both of Owen's primary concerns (anxiety + working memory).
Research chemical in the US. Not FDA-approved. Approved in Russia as prescription anxiolytic (brand name Selank 0.15%). Available from research peptide vendors.
Selank is a prescription medication in Russia. In the US it is sold as a research chemical with no restrictions on purchase. Not scheduled, not controlled. Available from nootropic and peptide research vendors as nasal spray or lyophilized powder.
Approved medication in Russia since 2009 with clinical use. Published human studies including anxiolytic efficacy trials. GABA binding studies in human tissue. However, most clinical data is in Russian-language journals. Limited Western clinical trials.
Disclaimer: This information is for educational and research purposes only. PepStack does not provide medical advice, diagnosis, or treatment recommendations. Consult a qualified healthcare provider before using any peptide or supplement. Research suggests these compounds may have various effects, but individual results vary and many claims require further clinical validation.