NA-Semax and NA-Selank are the two most commonly used cognitive peptide nasal sprays. Both have 30+ years of Russian research behind them. Both work via nasal delivery. Both upregulate BDNF. But they are not interchangeable — they target different aspects of cognitive and emotional function.
## NA-Semax: The Focus Compound
NA-Semax is derived from ACTH — a stimulating hormone — and its effects reflect that lineage. Primary documented effects include:
- BDNF and NGF upregulation — significant increases in both growth factors within 30 minutes of administration
- Enhanced dopamine and serotonin turnover in prefrontal cortex regions
- Improved working memory, attention, and processing speed in psychometric studies
- Stress resilience — users report better performance under pressure
The subjective experience most users describe: sharper focus, faster thinking, increased motivation. It has a mild stimulating quality — useful for work, study, or demanding cognitive tasks.
## NA-Selank: The Calm Compound
NA-Selank is derived from tuftsin — an immunomodulatory peptide — and has a regulatory rather than stimulating effect on neurochemistry. Primary documented effects:
- Anxiolytic effects comparable to low-dose benzodiazepines in clinical trials
- GABA system modulation without sedation or dependency
- BDNF upregulation (secondary mechanism) — unique among anti-anxiety compounds
- Improved memory alongside anxiety reduction — something benzodiazepines actively impair
The subjective experience: calm, reduced anxiety, clear-headed. Not sedating. Users describe it as turning down the stress response without turning off cognition.
## Key Differences
| | NA-Semax | NA-Selank |
|---|---|---|
| Primary effect | Focus, drive | Calm, anxiety relief |
| Mechanism | BDNF, dopamine | GABA modulation, BDNF |
| Feel | Mild stimulating | Calming, clarifying |
| Best for | Work, study, performance | Anxiety, stress, social situations |
| Dependency risk | None | None |
## When to Use Each
Use NA-Semax when: you need focused performance — demanding work, creative output, studying, presentations. Also useful first thing in the morning to start the day with sharp cognition.
Use NA-Selank when: anxiety is the primary obstacle — social situations, high-stress environments, days when rumination is interfering with function. Also useful for evening use if stress is affecting sleep.
## Using Both Together
Many users use both — Semax in the morning for drive and focus, Selank in the afternoon or evening for calm. This is a well-documented combination in Russian neurological research, where the two compounds are used to create what researchers describe as 'focused calm.'
Space doses by at least 30 minutes. Start with one compound before introducing the other so you know what each is doing independently.
## Who Should Use Which First
If your main complaint is anxiety, start with NA-Selank. If your main complaint is lack of focus or motivation, start with NA-Semax. If both apply, most users find Selank easier to tolerate initially because there is no stimulating quality to calibrate.
This article is for educational and informational purposes only. These statements have not been evaluated by the FDA. Dravixx Wellness products are not intended to diagnose, treat, cure, or prevent any disease.