Selank vs PE-22-28
Side-by-side comparison of key properties, dosing, and research.
- Summary
- Selank is a synthetic heptapeptide analog of tuftsin developed in Russia. It is a potent anxiolytic that reduces anxiety and enhances cognitive function without sedation or addiction. It is approved for clinical use in Russia for anxiety disorders.
- PE-22-28 is a synthetic analog of spadin derived from sortilin, designed to block TREK-1 potassium channels with rapid-onset antidepressant and neurogenic effects. It shows fast-acting depression relief (within 24 hours) and promotes hippocampal neurogenesis.
- Half-Life
- Minutes (but effects persist for hours)
- Relatively short; CNS effects may persist due to neurogenic mechanisms
- Admin Route
- SubQ, Intranasal
- SubQ, Intranasal
- Research
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- Typical Dose
- 250–500 mcg
- 200–400 mcg
- Frequency
- 1–3 times daily
- Once daily
- Key Benefits
- Reduces anxiety without sedation
- Enhances memory and learning
- Improves focus and concentration
- Stabilizes mood
- Reduces physiological stress response
- May enhance motivation
- No addiction potential or withdrawal
- Fast-acting — effects within 20–30 minutes
- Approved clinically in Russia for anxiety disorders
- Rapid-onset antidepressant effects (within 24 hours)
- Promotes hippocampal neurogenesis
- Improves cognitive performance and memory
- Reduces anxiety and depressive behavior
- Novel mechanism — does not act on serotonin/dopamine/GABA receptors directly
- May help treatment-resistant depression
- Neuroprotective effects
- Side Effects
- Mild sedation at higher doses (paradoxical)
- Fatigue (rare)
- Irritability during discontinuation (uncommon)
- Generally well tolerated in animal models
- Limited human data available
- Possible mild headache or transient mood changes at initiation
- Injection site reactions (SC)
- Stacks With
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