Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) developed as a stable analogue of the endogenous immunopeptide tuftsin. It has been the subject of Russian and Eastern European neuropharmacological research examining its interactions with the GABAergic system, BDNF expression, and serotonin metabolism. Preclinical studies have explored its anxiolytic profile, memory consolidation effects, and potential neuroprotective properties. Unlike classical benzodiazepines, it does not appear to produce sedation or withdrawal in animal models at research doses. Its stability in biological fluids has made it a useful tool compound for CNS research.