Selank

Selank (TKPRPGP) is a synthetic heptapeptide anxiolytic developed at the Institute of Molecular Genetics of the Russian Academy of Sciences from a tuftsin-based sequence, incorporating the Thr-Lys-Pro-Arg tuftsin core with a Pro-Gly-Pro C-terminal extension to enhance stability and CNS penetration, and registered in Russia as a pharmaceutical for the treatment of generalized anxiety disorder and adjustment disorders. Selank is proposed to modulate GABAergic, serotonergic, and enkephalinergic neurotransmission and to influence BDNF expression and immune-neurological signaling; intranasal administration is the primary route used clinically, producing rapid CNS delivery with a reportedly favorable tolerability profile based on Russian clinical experience. Human clinical studies published in the peer-reviewed Russian journal Zh Nevrol Psikhiatr Im S.S. Korsakova have examined selank in generalized anxiety disorder and adjustment disorders, reporting anxiolytic efficacy and good tolerability; these studies are indexed in PubMed, though no independently conducted blinded Western randomized controlled trials or external replications exist. Selank is registered as a pharmaceutical drug in Russia and is in active clinical use there; it has no FDA approval and is not approved in any Western jurisdiction, and while the Russian clinical evidence is genuine peer-reviewed work, it has not been validated by the independent replication standards applied to Western regulatory submissions. Intranasal administration — nasal spray — is the primary delivery route in Russian clinical practice, used in the registered pharmaceutical context for generalized anxiety disorder and adjustment disorders. Nasal spray formulations allow for rapid mucosal absorption and CNS penetration without systemic injection. Selank nasal spray is the most common research form used internationally; subcutaneous injection is also studied. Selank peptide dosing has been evaluated in the published Russian clinical literature in the context of anxiolytic and neurological applications; the registered pharmaceutical form specifies intranasal delivery. Selank peptide dosage and dosage chart The registered Russian pharmaceutical form of Selank specifies an intranasal spray concentration of 0.15% (1.5mg/mL). Published Russian clinical literature has examined intranasal selank doses across a range consistent with the registered pharmaceutical context; administration and dosing in clinical use occur under physician supervision per the Russian registered indication. Injectable selank (subcutaneous or intramuscular) is studied in research contexts with a different pharmacokinetic profile than the registered intranasal form. No approved dosing exists in Western jurisdictions. Selank and semax together Selank and semax are often discussed as a complementary pairing in the nootropic and research community due to their differing CNS profiles. Semax is a stimulating nootropic — it upregulates BDNF, increases dopamine and serotonin activity, and enhances alertness and cognitive drive. Selank is anxiolytic and calming — it modulates GABAergic tone, reduces anxiety-related arousal, and may counterbalance semax's stimulating effects in individuals prone to stimulant-related anxiety. The combination is proposed to provide cognitive enhancement (via semax) with reduced anxiety burden (via selank), though no controlled clinical trial has evaluated the combination specifically. Both are administered intranasally in clinical and research contexts; the two are sometimes used in separate intranasal preparations on alternating cycles or combined in the same protocol period depending on the individual response profile.