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selank anxiolytic other n=32 2026-04-03 PubMed

Selank Peptide Matches Medazepam for Anxiety, Adds Anti-Asthenic Benefits

[Efficacy and possible mechanisms of action of a new peptide anxiolytic selank in the therapy of generalized anxiety disorders and neurasthenia].

Background

Many individuals suffer from Generalized Anxiety Disorder (GAD) and neurasthenia, conditions characterized by persistent worry, fatigue, and reduced mental energy. Current treatments often have side effects or limited efficacy across all symptoms. This study aimed to evaluate the efficacy and mechanisms of a novel peptide, Selank, in treating these complex conditions, comparing it to a standard anxiolytic.

Results

The study revealed that Selank demonstrated an anxiolytic effect comparable to medazepam in reducing anxiety symptoms across the patient groups. Beyond its anxiety-reducing properties, Selank uniquely exhibited significant antiasthenic (anti-fatigue) and psychostimulant effects, which were not observed with medazepam. A key biological finding was the initial observation that patients with GAD and neurasthenia had a decreased baseline level of tau(1/2) leu-enkephalin in their blood serum, a reduction that correlated with disease duration and the severity of anxiety, asthenia, and autonomic disorders. > During treatment, Selank significantly increased the level of tau(1/2) leu-enkephalin, with this increase being most pronounced in GAD patients and showing stronger positive correlations with reduced anxiety levels.

Why It Matters

This research highlights Selank's potential as a novel therapeutic agent for Generalized Anxiety Disorder and neurasthenia, offering a dual benefit of anxiety reduction alongside anti-fatigue and psychostimulant effects. The observed modulation of tau(1/2) leu-enkephalin provides a plausible biochemical mechanism for its action, suggesting a unique pathway distinct from traditional anxiolytics. If further validated in larger, placebo-controlled trials, Selank could represent a significant advancement in treating these debilitating conditions, potentially leading to Phase II and III human trials to confirm its safety and efficacy for clinical use.


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Source: pubmed:18454096 · Ingested 2026-04-03 · Digest: gemini-2.5-flash