Stack Name
Russian Nootropic Stack
Updated April 2026
Written by Garret Grant
Founder & Lead Researcher · B.S. Civil Engineering, UCLA
Last updated: April 2026
Human-researched and AI-assisted with full editorial review. I verify sources, protocol interpretation, and final judgments personally. See methodology.
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Complete Dosing & Safety Guide for a 2-Peptide Nootropic Stack Combining Semax with Selank, covering dual-pathway rationale, dosing schedules, reconstitution math, safety boundaries, and evidence limitations.
Category
Combined Cognitive Enhancement + Anxiolytic Stack
Separate Dosing
Semax 300-800 mcg/day SC (morning); Selank 250-500 mcg/day SC (morning)
Cycle Length
4-8 weeks on / 4 weeks off
Regulatory
Semax and Selank approved in Russia; neither FDA-approved; not on WADA Prohibited List as of 2025
Need to calculate reconstitution and dosing units? Use the Pep Pal calculator.
Need a broader framework for combining compounds? Read the full stacking safety guide on PepPal.
Stack Name
Russian Nootropic Stack
Use Case
Research users commonly explore this stack for calm-focus cognitive protocols combining Semax + Selank.
Aliases
Semax + Selank Stack; Semax-Selank Nootropic Combo; NeuroFocus Stack
Category
Combined Cognitive Enhancement + Anxiolytic Stack
Standard Blend
None
Separate Dosing
Semax: 300-800 mcg/day SC (once daily, morning); Selank: 250-500 mcg/day SC (once daily, morning)
Cycle Length
4-8 weeks on / 4 weeks off
Oral Viable Components
None
Regulatory Status
Semax: approved in Russia, on List of Vital & Essential Drugs; not FDA-approved. Selank: approved in Russia for GAD/neurasthenia; not FDA-approved. Neither appears on the WADA Prohibited List as of 2025.
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The Russian Nootropic Stack is a two-peptide cognitive enhancement protocol combining Semax and Selank — two short-chain peptides developed at the Institute of Molecular Genetics of the Russian Academy of Sciences. Both compounds are registered pharmaceutical products in Russia with decades of clinical use. The stack's goal is straightforward: sharper thinking without the anxiety, overstimulation, or emotional blunting that often comes with stimulants and single-compound nootropics.
Here's the basic idea. Semax is the "gas pedal" — it boosts brain-derived neurotrophic factor (BDNF, a protein that strengthens brain connections), increases dopamine activity (the neurotransmitter tied to focus and motivation), and protects neurons from stress-related damage. Selank is the "brakes" — it calms the nervous system by enhancing GABA activity (your brain's main calming signal), stabilizing serotonin (tied to mood), and reducing anxiety. Used alone, Semax can sometimes feel overstimulating. Used alone, Selank provides calm but lacks the cognitive kick. Together, the Russian Nootropic Stack targets what the community calls "calm focus" — sustained attention and mental clarity under pressure without jitteriness, emotional reactivity, or post-use crashes.
No direct clinical trial has evaluated the full 2-peptide Semax + Selank combination. Combined protocols are based on each compound's individual evidence, Russian clinical practice (where both have been prescribed together), and community usage patterns. A brain-imaging study (Bakhmet et al., 2020) examined both Semax and Selank in the same group of healthy volunteers and found that each compound affected brain connectivity in both overlapping and distinct ways — providing indirect support for the idea that they work on complementary pathways.
Semax and Selank were developed by overlapping research teams at the same Russian institution. From the start, they were designed to do different things in the brain. Semax is the activator — it increases the brain's production of growth and repair proteins (BDNF and NGF), boosts dopamine and serotonin activity, and protects brain cells from stress and oxygen deprivation. Selank is the stabilizer — it enhances calming GABA signaling, steadies serotonin levels, slows the breakdown of natural pain-relief molecules called enkephalins, and reduces anxiety without making you foggy. Together, they create a brain environment where you can think more clearly *and* stay emotionally steady at the same time.
Semax is one of the most powerful known triggers of BDNF — a protein your brain uses to form new connections, strengthen existing ones, and support learning and memory. It rapidly increases BDNF and a related growth factor (NGF) in the hippocampus and frontal cortex, the brain regions most involved in memory and decision-making. Here's where Selank adds value: anxiety and chronic stress actively suppress BDNF production. By calming the nervous system and reducing baseline anxiety, Selank may remove that brake — allowing Semax's brain-building effects to work more effectively. The result is potentially greater cognitive improvement than either compound alone.
Semax boosts dopamine and serotonin activity in the brain, which sharpens attention, motivation, decision-making, and processing speed. The catch: boosting dopamine without a counterbalance can tip into overstimulation, irritability, or anxious restlessness — side effects some users report with Semax alone at higher doses. Selank provides that counterbalance. It enhances your brain's calming GABA signals in a way that works similarly to anti-anxiety medications (benzodiazepines) but without the sedation, tolerance buildup, or mental fog those drugs cause. The net effect is "focused calm" — the sharpness of dopamine-driven focus without the jittery edge.
Both compounds help you handle stress, but they do it in different ways. Semax protects brain cells from stress-related damage — it reduces harmful inflammation at the genetic level and supports the brain's repair systems when you're under prolonged pressure. Selank works more immediately: it activates calming brain signals and stabilizes your body's natural pain-relief molecules (enkephalins), directly dampening the physical anxiety response. Together, the Russian Nootropic Stack provides two layers of stress resilience: long-term brain protection (Semax) plus real-time emotional steadiness (Selank). This dual coverage is particularly relevant for sustained high-performance demands — exam preparation, executive decision-making, or creative work under deadline pressure.
Both Semax and Selank influence the immune system, though through different pathways. Semax affects how the body produces immune-signaling molecules and responds to tissue stress. Selank helps regulate the balance between different types of immune responses — effects that have been measured in human anxiety patients. The practical implication: when you're pushing hard mentally and physically, both compounds may help your immune system stay resilient. This is a secondary benefit, not the primary reason to use the stack, but it's relevant for anyone burning the candle at both ends.
This section covers exactly how to dose the Russian Nootropic Stack — including starting doses, maintenance ranges, daily schedules, and cycle lengths for both subcutaneous injection and intranasal formats.
Evidence Level Notice
No clinical trial evaluates Semax and Selank together as a defined combination protocol. The following dosing schedules are extrapolated from individual compound clinical data and community practice. Both compounds are approved separately in Russia. An fMRI study has examined both compounds in the same healthy volunteers but did not evaluate combined administration.
Per-Compound Dosing Table
Compound: Semax
Loading (Weeks 1-2): 300 mcg/day
Maintenance (Weeks 3-8): 500-800 mcg/day
Frequency: Once daily (morning)
Route: Subcutaneous
Compound: Selank
Loading (Weeks 1-2): 250 mcg/day
Maintenance (Weeks 3-8): 400-500 mcg/day
Frequency: Once daily (morning)
Route: Subcutaneous
Weekly Schedule Example (Maintenance Phase)
Day: Monday
Semax: 600 mcg SC (AM)
Selank: 400 mcg SC (AM)
Notes: Separate injection sites
Day: Tuesday
Semax: 600 mcg SC (AM)
Selank: 400 mcg SC (AM)
Notes: Rotate sites from Monday
Day: Wednesday
Semax: 600 mcg SC (AM)
Selank: 400 mcg SC (AM)
Notes:
Day: Thursday
Semax: 600 mcg SC (AM)
Selank: 400 mcg SC (AM)
Notes:
Day: Friday
Semax: 600 mcg SC (AM)
Selank: 400 mcg SC (AM)
Notes:
Day: Saturday
Semax: Rest
Selank: Rest
Notes: Optional 5-on-2-off pattern
Day: Sunday
Semax: Rest
Selank: Rest
Notes:
Compound: Semax (0.1% solution or reconstituted nasal)
Dose Per Administration: 200-300 mcg
Frequency: 2x daily (AM + early afternoon)
Daily Total: 400-600 mcg
Duration: 10-14 days
Compound: Selank (0.15% solution or reconstituted nasal)
Dose Per Administration: 200-250 mcg
Frequency: 2-3x daily
Daily Total: 400-750 mcg
Duration: 10-14 days
Intranasal spacing: Use Selank first, wait 15–30 minutes, then use Semax. This gap lets each peptide absorb separately and lets you feel Selank's calming effect settle in before adding Semax's stimulating boost.
Cycle Guidelines Table
Approach: Standard Cycle
Duration: 4 weeks on
Off Period: 4 weeks off
Best For: General cognitive enhancement, work performance
Approach: Short Intensive
Duration: 10-14 days on
Off Period: 10-14 days off
Best For: Exam preparation, acute project demands, public speaking
Approach: Extended Cycle (5-on-2-off)
Duration: 8 weeks (5 days/week)
Off Period: 4 weeks off
Best For: Chronic stress management, long-term cognitive optimization
Approach: Clinical Intranasal Reference
Duration: 14-21 days on
Off Period: 14-21 days off
Best For: Mirroring Russian clinical trial protocols
The table below shows how to mix each peptide with bacteriostatic (BAC) water and how much liquid to draw into your syringe for common doses. Find your vial size in the left column, then read across to your target dose. The "Volume / Units" column tells you exactly how much to draw — in both milliliters and insulin syringe units (where 0.10 mL = 10 units on a standard U-100 syringe).
Peptide: Semax
Vial Size: 10 mg
BAC Water: 3 mL
Concentration: 3,333 mcg/mL
Common Dose: 300 mcg
Volume / Units: 0.09 mL (9 units)
Peptide: Semax
Vial Size: 10 mg
BAC Water: 3 mL
Concentration: 3,333 mcg/mL
Common Dose: 600 mcg
Volume / Units: 0.18 mL (18 units)
Peptide: Semax
Vial Size: 10 mg
BAC Water: 3 mL
Concentration: 3,333 mcg/mL
Common Dose: 800 mcg
Volume / Units: 0.24 mL (24 units)
Peptide: Selank
Vial Size: 10 mg
BAC Water: 3 mL
Concentration: 3,333 mcg/mL
Common Dose: 250 mcg
Volume / Units: 0.075 mL (7.5 units)
Peptide: Selank
Vial Size: 10 mg
BAC Water: 3 mL
Concentration: 3,333 mcg/mL
Common Dose: 400 mcg
Volume / Units: 0.12 mL (12 units)
Peptide: Selank
Vial Size: 10 mg
BAC Water: 3 mL
Concentration: 3,333 mcg/mL
Common Dose: 500 mcg
Volume / Units: 0.15 mL (15 units)
Peptide: Semax
Vial Size: 5 mg
BAC Water: 2 mL
Concentration: 2,500 mcg/mL
Common Dose: 500 mcg
Volume / Units: 0.20 mL (20 units)
Peptide: Selank
Vial Size: 5 mg
BAC Water: 2 mL
Concentration: 2,500 mcg/mL
Common Dose: 250 mcg
Volume / Units: 0.10 mL (10 units)
Peptide: Selank
Vial Size: 5 mg
BAC Water: 2 mL
Concentration: 2,500 mcg/mL
Common Dose: 500 mcg
Volume / Units: 0.20 mL (20 units)
Unit Reminder
Both Semax and Selank are dosed in mcg (micrograms), not mg. At the concentration ranges above, typical daily injection volumes are very small (0.075-0.24 mL per compound). Use 30- or 50-unit insulin syringes for improved accuracy at volumes below 10 units. Label every vial with compound name, concentration, and reconstitution date.
Reconstituted Stability Table
Peptide: Semax
Reconstituted Stability (2-8C): Up to 30 days
Notes: Protect from light - Semax contains methionine, susceptible to oxidation. Wrap vial in foil.
Peptide: Selank
Reconstituted Stability (2-8C): ~3-4 weeks
Notes: Standard refrigeration; avoid freeze-thaw cycles
Limiting factor: Semax's light sensitivity makes it the more storage-sensitive compound. Store both vials refrigerated, light-protected, and use within 30 days of reconstitution.
Use the Peptide Reconstitution Calculator for 2-compound Russian Nootropic Stack workflows - enter each vial size and BAC water volume separately to get exact syringe units for your target dose.
Both Semax and Selank individually have favorable safety profiles supported by decades of Russian clinical use. Semax is listed on Russia's List of Vital & Essential Drugs. Selank's safety has been compared favorably to anti-anxiety medications (benzodiazepines) in multiple clinical studies. However, no clinical trial has evaluated the combined Semax + Selank stack, so the concerns below are theoretical — based on what each compound does individually.
For combined side effect considerations when stacking, see the PepPal Side Effects Guide.
Critical Note
No study has evaluated the full 2-peptide Russian Nootropic Stack (Semax + Selank) as a defined combination therapy.
Evidence Snapshot Table
Peptide: Semax
Evidence Snapshot: Approved in Russia since 1990s; on List of Vital & Essential Drugs (2011). 110-patient stroke rehabilitation trial showed increased plasma BDNF and accelerated functional recovery (Gusev et al., 2018). fMRI pilot in 24 healthy volunteers demonstrated altered default mode network activity (Lebedeva et al., 2018). Extensive Russian clinical use for stroke, cognitive disorders, optic nerve disease.
Reference: Semax Protocol Page
Peptide: Selank
Evidence Snapshot: Approved in Russia for GAD and neurasthenia. 62-patient trial showed anxiolytic effects comparable to medazepam with additional anti-asthenic effects (Zozulia et al., 2008). 60-patient trial demonstrated anxiolytic effect comparable to phenazepam with nootropic benefits and quality-of-life improvements (Seredenin et al., 2014). fMRI study showed specific amygdala-cortex connectivity changes (Bakhmet et al., 2020).
Reference: Selank Protocol Page
In plain terms, the Russian Nootropic Stack pairs two complementary strategies: Semax builds cognitive capacity (brain growth factors, dopamine-driven focus, neuroprotection) while Selank creates the emotional stability (calm nervous system, steady mood, reduced anxiety) needed to actually use that capacity under pressure. The evidence for each compound individually is solid; the evidence for the specific combination remains theoretical.
Parameter: Lyophilized
Semax: -20C long-term; 2-8C short-term
Selank: -20C long-term; 2-8C short-term
Parameter: Reconstituted
Semax: 2-8C; up to 30 days
Selank: 2-8C; ~3-4 weeks
Parameter: Color
Semax: Clear, colorless
Selank: Clear, colorless
Parameter: Oral viable
Semax: No
Selank: No
Parameter: Light sensitive
Semax: Yes - wrap in foil (methionine oxidation)
Selank: No special light requirements
Limiting factor: Semax's light sensitivity governs storage planning. Both vials should be stored refrigerated and light-protected for consistency. Use reconstituted solutions within 30 days. Avoid freeze-thaw cycles for both compounds.
Comparison Table
Feature: Components
Russian Nootropic Stack (Semax + Selank): Semax + Selank
Semax Alone: Semax
Semax + Selank + DSIP Triple Stack: Semax + Selank + DSIP
Feature: Pathways
Russian Nootropic Stack (Semax + Selank): BDNF/dopamine (cognitive) + GABA/serotonin (anxiolytic)
Semax Alone: BDNF/dopamine (cognitive) only
Semax + Selank + DSIP Triple Stack: Cognitive + Anxiolytic + Sleep optimization
Feature: Anxiety Coverage
Russian Nootropic Stack (Semax + Selank): Yes (Selank GABAergic)
Semax Alone: No (may increase arousal)
Semax + Selank + DSIP Triple Stack: Yes (Selank)
Feature: Sleep Support
Russian Nootropic Stack (Semax + Selank): No
Semax Alone: No
Semax + Selank + DSIP Triple Stack: Yes (DSIP)
Feature: Complexity
Russian Nootropic Stack (Semax + Selank): Moderate (2 vials, 2 injections)
Semax Alone: Low (1 vial, 1 injection)
Semax + Selank + DSIP Triple Stack: High (3 vials, 3 injections or blend)
Feature: Cost
Russian Nootropic Stack (Semax + Selank): Moderate (~$60-100/month for both compounds)
Semax Alone: Low (~$30-50/month)
Semax + Selank + DSIP Triple Stack: Higher (~$90-150/month)
Feature: Best For
Russian Nootropic Stack (Semax + Selank): Calm focus; anxiety-prone individuals who need cognitive enhancement
Semax Alone: Pure cognitive enhancement in individuals without significant anxiety
Semax + Selank + DSIP Triple Stack: Full-spectrum brain optimization including sleep architecture
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The Russian Nootropic Stack is a two-peptide cognitive enhancement protocol combining Semax and Selank - both heptapeptides developed at the Institute of Molecular Genetics of the Russian Academy of Sciences. Semax provides cognitive enhancement through BDNF elevation and dopaminergic activation, while Selank provides anxiolytic support through GABAergic modulation. Both are approved pharmaceutical products in Russia. The stack targets calm focus - enhanced mental clarity, attention, and learning without anxiety or overstimulation.
Semax alone sharpens thinking and protects brain cells but may increase restlessness and doesn't address anxiety. Selank alone reduces anxiety and provides mild cognitive benefits but lacks Semax's powerful brain-growth-factor boost (BDNF) and dopamine-driven focus. The combination fills both gaps: Semax supplies the cognitive engine while Selank provides the emotional steadiness needed for that brainpower to actually perform under stress.
For subcutaneous injection, start Selank at 250 mcg/day for the first week, then add Semax at 300 mcg/day in week 2. Titrate each compound independently: increase Selank to 400-500 mcg/day and Semax to 500-800 mcg/day based on individual response over weeks 3-8. Both compounds are administered once daily in the morning. For intranasal use, administer Selank first, wait 15-30 minutes, then administer Semax.
Each compound is reconstituted separately in its own vial. For 10 mg vials, add 3 mL of bacteriostatic water to each, producing 3,333 mcg/mL. At this concentration, a 600 mcg Semax dose = 0.18 mL (18 units) and a 400 mcg Selank dose = 0.12 mL (12 units) on a U-100 insulin syringe. Do not mix compounds in the same syringe. Wrap the Semax vial in foil to protect from light. Use the PepPal Reconstitution Calculator for custom vial and water combinations.
Community users and clinical practitioners commonly report improved mental clarity and focus, reduced brain fog, better stress tolerance, enhanced learning and memory consolidation, improved verbal fluency, and calmer emotional baseline during high-demand periods. Effects typically develop over 3-7 days of consistent use.
Both compounds individually have favorable safety profiles supported by decades of Russian clinical use and multiple human trials. Neither produces sedation, dependence, tolerance, or withdrawal. Common side effects are mild: headache, nasal irritation, and sleep disruption if Semax is taken too late in the day. No clinical trial has tested the combined stack, so theoretical concerns include both compounds affecting serotonin at the same time and Semax's stimulating effects stacking with other stimulants you may be taking.
Standard protocols run 4-8 weeks on, followed by 4 weeks off. Shorter intensive courses of 10-14 days are used for acute cognitive demands. An alternative 5-days-on, 2-days-off schedule extends to 8 weeks with built-in micro-rest periods.
Yes, both can be given during the same morning session. For subcutaneous injection, use separate syringes and inject at different sites. Do not mix in the same syringe. For intranasal use, administer Selank first, wait 15-30 minutes, then administer Semax.
Yes. Both Semax and Selank were originally developed and are clinically approved in Russia as intranasal formulations. Intranasal doses are typically higher than subcutaneous doses to account for absorption differences.
The stack is best suited for individuals who experience both cognitive demands and anxiety or stress. The stack adds value when anxiety impairs cognitive performance, when Semax alone feels overstimulating, when sustained focus under pressure is needed, or when broader neuromodulation is desired.
No. Semax is derived from a fragment of ACTH, a hormone that your body uses to trigger cortisol production. However, Semax was specifically engineered to keep the brain-boosting effects of that fragment while removing the hormonal activity. Published data does not show Semax raising cortisol levels.
Use the PepPal Reconstitution Calculator to calculate exact syringe units for each compound by entering each peptide separately with its own vial size, BAC water volume, and target dose.
Yes. Adding DSIP creates the Triple Nootropic Stack: Semax (AM cognitive enhancement), Selank (AM anxiolysis), and DSIP (PM sleep optimization). This remains a higher-complexity, unvalidated combination model.
No. All information on this page is for educational and research reference purposes only. Neither Semax nor Selank is FDA-approved. The protocol is extrapolated from individual compound evidence and community practice, not combination clinical trial data.
Use the PepPal calculator for exact dose-to-unit conversions.
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View protocolThe information on this page is for educational and research reference purposes only. Neither Semax nor Selank is FDA-approved in the United States. No compounds discussed on this site are intended for unsupervised human consumption. This is not medical advice. Consult a qualified healthcare professional before considering any peptide protocol.
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