Selank Dosage Guide

Evidence-based protocols for the anxiolytic nootropic peptide — intranasal and subcutaneous dosing, BDNF upregulation, immune modulation, stacking with Semax, cycling, and safety.

Compiled by PeptideWiki Editorial Team·Last reviewed February 24, 2026

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Research Peptides

Selank

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What Is Selank?

Selank (Thr-Lys-Pro-Arg-Pro-Gly-Pro) is a synthetic heptapeptide developed at the Institute of Molecular Genetics of the Russian Academy of Sciences. It is a structural analog of tuftsin — an endogenous tetrapeptide (Thr-Lys-Pro-Arg) that is naturally cleaved from the Fc region of immunoglobulin G and plays a role in immune regulation. Selank extends the tuftsin sequence with a Pro-Gly-Pro tripeptide tail that enhances metabolic stability and adds nootropic properties.

Selank is classified as both an anxiolytic and a nootropic peptide. It modulates multiple neurotransmitter systems — including GABA, serotonin, dopamine, and norepinephrine — producing anxiolytic effects comparable to low-dose benzodiazepines, but without the sedation, cognitive impairment, tolerance buildup, or addiction potential that characterize benzodiazepine use. Simultaneously, Selank enhances brain-derived neurotrophic factor (BDNF) expression, promoting synaptic plasticity, memory formation, and neuroprotection.

Selank is approved in Russia as a prescription anxiolytic (Selank nasal spray 0.15%) and has been the subject of considerable clinical and preclinical research. In most Western countries, it is classified as a research peptide and is not FDA-approved. This guide covers intranasal and subcutaneous dosing protocols, BDNF enhancement, immune modulation, stacking with Semax, cycling, and safety considerations.

Use our Peptide Dosage to calculate your exact dose based on vial size and concentration.

Dosing information in this guide is derived from Russian clinical data, published research, and community protocols — not from approved pharmaceutical labeling.

Key Characteristics:

Anxiolytic nootropic — reduces anxiety comparable to low-dose benzodiazepines without sedation, cognitive impairment, or addiction potential
Heptapeptide — 7 amino acids: Thr-Lys-Pro-Arg-Pro-Gly-Pro (tuftsin analog with Pro-Gly-Pro extension)
Multi-system modulation — GABA, serotonin, dopamine, and norepinephrine systems — broad neurochemical normalization rather than single-receptor targeting
BDNF upregulation — enhances brain-derived neurotrophic factor expression in hippocampus and frontal cortex, supporting neuroplasticity and memory
Immunomodulatory — derived from tuftsin; modulates IL-6, interferon pathways, and immune cell function independently of anxiolytic effects
No addiction or withdrawal — unlike benzodiazepines, no tolerance, physical dependence, or rebound anxiety upon discontinuation
Short half-life, lasting effects — plasma half-life of several minutes, but downstream signaling (BDNF, neurotransmitter modulation) produces effects lasting hours

For a complete overview of its mechanism and research, see our full Selank profile. New to peptides? Start with the Beginner's Guide to Peptides.

How Selank Dosage Is Determined

Selank dosing is informed by Russian clinical data (where it is an approved pharmaceutical), preclinical pharmacology studies, and extensive community experience. The Russian-approved formulation provides a useful reference point for dosing, though research protocols have explored a broader dose range.

Russian Pharmaceutical Data

The approved Russian pharmaceutical product is a 0.15% nasal spray solution delivering approximately 75 mcg per spray actuation. The standard prescribed regimen is 2–3 sprays per nostril, 3 times daily, for a total daily intranasal dose of approximately 900–1,350 mcg. Treatment courses typically run 14 days, with the option to repeat after a break. This pharmaceutical data provides the foundation for the dosing ranges used in research and community protocols.

Preclinical Pharmacology

Seredenin, Kozlovskaya, and colleagues at the Institute of Molecular Genetics conducted extensive preclinical studies establishing Selank's dose-response characteristics. Animal studies demonstrated anxiolytic effects at doses ranging from 100–500 mcg/kg, with the anxiolytic response plateauing at moderate doses. BDNF upregulation was observed after repeated daily administration over 5–7 days, confirming that the nootropic benefits are cumulative rather than acute.

Enkephalin Stabilization

A key component of Selank's mechanism is the stabilization of enkephalin metabolism. Selank inhibits enkephalinase enzymes that normally degrade endogenous enkephalins, effectively increasing the availability of these natural anxiolytic neuropeptides. This mechanism contributes to the “clean” anxiolytic profile — reduced anxiety without sedation — and operates independently of direct GABAergic agonism.

Immune Modulation Research

Ershov et al. demonstrated that Selank modulates interferon-related gene expression and influences cytokine profiles including IL-6. These immunomodulatory effects are inherited from the parent peptide tuftsin and occur at standard anxiolytic doses, providing a dual benefit — neurological and immunological — from a single compound.

Strength of evidence: Moderate to strong (for a research peptide). Selank has more clinical data than most research peptides, including Russian regulatory approval based on controlled clinical trials. Preclinical data is extensive, including mechanism-of-action studies, BDNF expression analysis, and behavioral pharmacology. However, large-scale Western clinical trials and long-term safety studies are lacking.

Standard Selank Dosage Ranges

Selank is administered intranasally (primary route) or by subcutaneous injection. The intranasal route is preferred because it provides rapid absorption through the nasal mucosa, bypasses first-pass hepatic metabolism, and allows direct access to the CNS via the olfactory pathway. Subcutaneous injection is an alternative when nasal congestion or other factors limit intranasal efficacy.

Intranasal Dosage by Experience Level

Level	Dose per Administration	Frequency	Daily Total	Notes
Beginner	200–250 mcg	1–2x daily	200–500 mcg	Assess individual response and tolerability; ideal starting point
Intermediate	250–500 mcg	2–3x daily	500–1,500 mcg	Standard protocol for most users; aligns with Russian pharmaceutical dosing
Advanced	500 mcg	3x daily	1,500 mcg	Upper range; diminishing returns above this level for most users

Subcutaneous Dosage by Experience Level

Level	Dose per Injection	Frequency	Daily Total	Notes
Beginner	100 mcg	1x daily	100 mcg	Conservative starting dose; SubQ has higher bioavailability than intranasal
Intermediate	200 mcg	1–2x daily	200–400 mcg	Standard SubQ protocol; lower doses than intranasal due to better absorption
Advanced	250–300 mcg	1–2x daily	250–600 mcg	Upper SubQ range; most users do not need to exceed 300 mcg per injection

Administration Timing

Can be taken with or without food: Selank's efficacy is not significantly affected by food intake (unlike GH-releasing peptides that require fasting)
Morning + early afternoon: Preferred timing for most users to align with periods of highest cognitive demand
Space doses 4–6 hours apart: When using 2–3x daily protocols, distribute doses evenly throughout the day
Acute situational use: Selank can be taken as needed for acute anxiety situations, with onset within 10–30 minutes intranasally

Dose-response ceiling: Selank exhibits diminishing returns above approximately 500 mcg per intranasal administration. Higher single doses do not produce proportionally greater anxiolytic or nootropic effects and may increase the likelihood of mild side effects like fatigue. If the desired response is not achieved at standard doses, consider stacking with Semax rather than escalating Selank dose.

Intranasal vs. Subcutaneous Administration

Selank can be administered by two routes, each with distinct advantages. The intranasal route is the most widely used and is the approved pharmaceutical route in Russia. Subcutaneous injection offers an alternative with different absorption characteristics.

Parameter	Intranasal	Subcutaneous
Bioavailability	Moderate (nasal mucosa absorption)	Higher (direct systemic absorption)
CNS Access	Direct via olfactory pathway	Indirect (crosses BBB from systemic circulation)
Onset	10–30 minutes	15–45 minutes
Typical Dose Range	250–500 mcg, 1–3x daily	100–300 mcg, 1–2x daily
Ease of Use	Very easy (nasal spray)	Requires injection technique
Limitations	Reduced by nasal congestion, allergies	Injection site reactions, injection supplies
Best For	Daily use, convenience, acute anxiety	When nasal route is compromised, precise dosing

Recommendation: Start with intranasal administration unless you have chronic nasal congestion or other factors that limit nasal absorption. The intranasal route provides direct CNS access via the olfactory pathway, rapid onset, and the convenience of a nasal spray. Subcutaneous injection is a viable alternative with higher systemic bioavailability but requires injection supplies and technique.

Intranasal Administration Tips

Clear nasal passages before administration — blow nose gently if needed
Tilt head slightly forward (not back) to keep the solution on the nasal mucosa rather than draining into the throat
Aim the spray toward the outer nasal wall (lateral), not the septum (center)
Avoid sniffing forcefully for 30 seconds after spraying — gentle breathing is sufficient
Alternate nostrils between doses to reduce irritation when dosing multiple times daily

Calculate Your Selank Dose

Selank is supplied as a lyophilized (freeze-dried) powder, typically in 5 mg or 10 mg vials. For intranasal use, reconstitute with bacteriostatic water and transfer to a nasal spray bottle. For subcutaneous injection, reconstitute and draw your dose using an insulin syringe. The concentration depends on how much water you add.

Worked Example (Subcutaneous):

Vial size: 5 mg (5,000 mcg) of Selank
Bacteriostatic water added: 2 mL
Concentration: 5,000 mcg ÷ 2 mL = 2,500 mcg per mL
Target dose: 250 mcg
Volume to draw: 250 ÷ 2,500 = 0.1 mL = 10 units on an insulin syringe

Quick Reference — 5 mg Vial (Subcutaneous)

Bac Water Added	Concentration	200 mcg Dose	300 mcg Dose
1 mL	5,000 mcg/mL	4 units (0.04 mL)	6 units (0.06 mL)
2 mL	2,500 mcg/mL	8 units (0.08 mL)	12 units (0.12 mL)
2.5 mL	2,000 mcg/mL	10 units (0.1 mL)	15 units (0.15 mL)
5 mL	1,000 mcg/mL	20 units (0.2 mL)	30 units (0.3 mL)

Intranasal Reconstitution Note:

For intranasal use, reconstitute a 5 mg vial with 2–2.5 mL of bacteriostatic water, then transfer the solution to a metered nasal spray bottle. Most nasal spray bottles deliver approximately 0.1 mL per spray actuation. With a 2,000 mcg/mL concentration, each spray delivers approximately 200 mcg. Adjust the water volume and number of sprays to achieve your target dose. Pre-made intranasal formulations are also available from research suppliers.

Skip the Math — Use Our

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Selank Dosage by Goal

Selank's multi-system activity — anxiolytic, nootropic, and immunomodulatory — makes it applicable to a range of goals. The optimal protocol varies depending on whether you are targeting anxiety reduction, cognitive enhancement, immune support, or a combination.

Anxiety Reduction & Stress Management

For users seeking relief from generalized anxiety, social anxiety, or stress without the sedation or cognitive blunting of traditional anxiolytics. Selank's modulation of GABA, serotonin, and enkephalin systems provides a “clean” anxiolytic effect — reduced anxiety with maintained or enhanced cognitive clarity.

Dose: 250–500 mcg intranasally, or 150–250 mcg SubQ
Frequency: 2–3x daily
Cycle: 2–4 weeks on, 1–2 weeks off
Note: Acute anxiety relief occurs within 10–30 minutes of intranasal dosing; cumulative improvements develop over 1–2 weeks of consistent use

Cognitive Enhancement & BDNF Upregulation

For users targeting memory, learning, focus, and long-term neuroprotection. The nootropic effects are primarily mediated through BDNF upregulation and synaptic plasticity enhancement, which develop over days to weeks of consistent daily administration. This protocol emphasizes regular dosing over acute high-dose administration.

Dose: 250–400 mcg intranasally, or 150–200 mcg SubQ
Frequency: 2x daily (morning + early afternoon)
Cycle: 3–4 weeks on, 1–2 weeks off
Stack: + Semax 200–600 mcg intranasally for synergistic nootropic effects (BDNF + NGF dual enhancement)

Immune Modulation & Recovery Support

Selank's tuftsin-derived immunomodulatory properties make it relevant for immune system support, particularly during periods of stress, overtraining, or seasonal vulnerability. It modulates cytokine expression (IL-6, interferon) and influences immune cell function without the immunosuppressive effects of corticosteroids or the broad stimulation of conventional immune boosters.

Dose: 250–500 mcg intranasally, or 200–300 mcg SubQ
Frequency: 1–2x daily
Cycle: 2–3 weeks on, 1 week off; or use during acute illness recovery periods
Note: Immunomodulatory effects complement the anxiolytic profile — stress reduction itself supports immune function

Combined protocol: Many users target multiple goals simultaneously because Selank's anxiolytic, nootropic, and immunomodulatory effects all occur at the same dose range. A standard protocol of 250–500 mcg intranasally, 2x daily, for 2–4 weeks addresses all three domains without needing separate dosing strategies. This is one of Selank's key advantages over single-mechanism compounds.

Neuroprotection & Brain Health

For users focused on long-term brain health, neuroprotection, and prevention of cognitive decline. Selank's BDNF upregulation, antioxidant-related gene expression, and enkephalin stabilization collectively support neuronal health. This protocol emphasizes lower-dose, longer-duration use with periodic cycling.

Dose: 200–300 mcg intranasally, or 100–200 mcg SubQ
Frequency: 1–2x daily
Cycle: 4 weeks on, 2 weeks off; repeat
Long-term approach: Consistent periodic cycles over months; this is a marathon, not a sprint

Consistency matters more than peak dose. Selank's most valuable effects (BDNF upregulation, neuroplasticity, immune modulation) are cumulative and develop over days to weeks of regular use. A moderate daily dose maintained consistently over a full cycle will outperform sporadic high-dose use every time.

Cycling Protocols

Unlike many peptides where cycling is mandatory to prevent receptor desensitization, Selank does not appear to cause tolerance or dependence. No withdrawal symptoms have been reported upon discontinuation. However, cycling is still recommended as a best practice to maintain optimal sensitivity and to allow natural neurochemistry to recalibrate during off-periods.

Cycling is recommended, not mandatory. Selank has no reported tolerance, dependence, or withdrawal. Some users run it continuously for 8–12 weeks without diminishing effects. However, periodic breaks are considered best practice for any neuroactive compound, and the Russian pharmaceutical guidelines recommend 14-day treatment courses.

Cycling Protocols

Protocol	On-Cycle	Off-Cycle	Notes
Russian Pharmaceutical	14 days	14 days off	Based on the approved Russian prescribing protocol; conservative approach
Standard Research	3–4 weeks	1–2 weeks off	Most common community protocol; balances cumulative benefit with periodic breaks
Extended	6–8 weeks	2–3 weeks off	For experienced users; longer on-period to maximize BDNF and neuroplasticity effects
Situational / As-Needed	As needed	N/A	For acute anxiety; single-dose or short-run use before stressful events (does not provide full BDNF benefits)

Why Cycle Even Without Tolerance?

Receptor sensitivity optimization: Periodic breaks help maintain maximal receptor responsiveness to Selank's GABA and monoamine modulation
Natural neurochemistry recalibration: Off-periods allow endogenous neurotransmitter systems to operate independently, preventing reliance on exogenous support
Evaluation of baseline: Off-periods let you assess how much of the improvement persists without Selank, helping gauge true neuroplastic changes vs. acute pharmacological effects
Russian regulatory guidance: The approved pharmaceutical protocol uses defined treatment courses, suggesting the developers considered periodic breaks optimal

Transition note: When stopping Selank at the end of a cycle, no taper is needed. Simply discontinue. There are no reported withdrawal symptoms or rebound anxiety. Any benefits from BDNF upregulation and neuroplasticity changes persist beyond the active dosing period.

Selank Stacking Protocols

Selank stacks well with several peptides due to its unique mechanism of action. The most established stack is with Semax, which provides complementary nootropic and neurotrophic effects. Selank can also be combined with tissue-repair peptides and other anxiolytic compounds for broader therapeutic coverage.

Selank + Semax — The Russian Nootropic Stack (Gold Standard)

The most widely used and best-documented Selank stack. Selank provides anxiolytic + BDNF effects, while Semax provides cognitive stimulation + NGF (nerve growth factor) enhancement. Together they produce complementary neurotrophic support: Selank upregulates BDNF while Semax upregulates both BDNF and NGF, creating a comprehensive neuroplasticity environment.

Compound	Dose	Route	Purpose
Selank	250–500 mcg	Intranasal, 2–3x daily	Anxiolytic, BDNF upregulation, enkephalin stabilization
Semax	200–600 mcg	Intranasal, 2–3x daily	Cognitive stimulation, NGF + BDNF upregulation, focus

Protocol note: Selank and Semax can be administered at the same time intranasally. Some users alternate nostrils (Selank in one, Semax in the other), while others administer both in the same nostril separated by 5–10 minutes. Both approaches are effective. Run the same cycle length for both peptides (typically 3–4 weeks on, 1–2 weeks off).

Selank + BPC-157 (Neuro + Gut Axis Support)

Combines Selank's central nervous system effects with BPC-157's gut-brain axis and tissue repair properties. BPC-157 has demonstrated neuroprotective effects of its own, including dopaminergic system modulation, and its gut-healing properties support the gut-brain axis. This stack is popular among users seeking simultaneous anxiety reduction, cognitive support, and gut health improvement.

Compound	Dose	Route	Purpose
Selank	250–500 mcg	Intranasal, 2x daily	CNS anxiolytic, BDNF, immune modulation
BPC-157	250–500 mcg	SubQ or oral, 1–2x daily	Gut-brain axis, tissue repair, dopaminergic neuroprotection

Selank + NA-Selank (Standard + Acetylated for Extended Coverage)

For users who want both rapid-onset and longer-duration effects. Standard Selank provides quick anxiolytic onset, while NA-Selank (N-Acetyl Selank) has improved metabolic stability for a longer duration of action. Some users take standard Selank in the morning for rapid effect and NA-Selank in the afternoon for sustained coverage without a third dose.

Compound	Dose	Timing	Purpose
Selank (standard)	250–500 mcg intranasal	Morning	Rapid-onset anxiolytic and cognitive priming
NA-Selank (acetylated)	200–400 mcg intranasal	Early afternoon	Extended duration coverage through evening

Full Neuropeptide Stack: Selank + Semax + BPC-157

The comprehensive neuropeptide stack for users targeting maximum cognitive enhancement, anxiety reduction, neuroprotection, and gut-brain axis support. This three-peptide combination covers BDNF, NGF, enkephalin stabilization, dopaminergic modulation, and tissue repair simultaneously.

Compound	Dose	Route	Purpose
Selank	250–500 mcg	Intranasal, 2x daily	Anxiolytic, BDNF, immune modulation
Semax	200–600 mcg	Intranasal, 2x daily	Cognitive stimulation, NGF + BDNF
BPC-157	250–500 mcg	SubQ or oral, 1–2x daily	Gut-brain axis, tissue repair, neuroprotection

Start simple, add complexity gradually. If you are new to nootropic peptides, start with Selank alone for at least one full cycle before adding Semax or other compounds. This lets you evaluate Selank's individual effects before introducing variables. Stacking multiple compounds from the start makes it impossible to attribute benefits or side effects to any specific peptide.

Explore more combinations with our Peptide Stack Builder or browse the Top 10 Peptide Stacks guide.

Safety, Side Effects & Contraindications

Safety Profile: Selank has one of the most favorable safety profiles of any research peptide. Russian clinical data and extensive preclinical research consistently describe it as well-tolerated with minimal side effects. No tolerance, dependence, or withdrawal has been reported. However, long-term Western clinical trials and large-scale safety studies are lacking.

Common Side Effects

Mild and infrequent:

Nasal irritation or mild burning — the most commonly reported side effect with intranasal administration; usually resolves within minutes
Mild fatigue at higher doses — typically above 500 mcg intranasally; dose-dependent and resolves with dose reduction
Occasional headache — uncommon; more likely during the first few days of use and usually transient
Mild changes in taste or smell — temporary, related to intranasal delivery route

Rare or very uncommon:

Injection site redness or irritation — with subcutaneous route; generally mild and transient
Mild dizziness — very rare; if persistent, reduce dose
Allergic reactions — extremely rare; discontinue if any signs of allergy (rash, swelling, difficulty breathing)

No sedation, no cognitive impairment, no addiction. This is Selank's key differentiator from benzodiazepines and many conventional anxiolytics. Research consistently shows that Selank maintains or improves cognitive function while reducing anxiety. No tolerance, physical dependence, or withdrawal symptoms have been reported in any study.

Contraindications

Pregnancy and breastfeeding — no safety data exists for Selank during pregnancy or nursing. Avoid entirely.
Known allergy to Selank or tuftsin — discontinue immediately if any allergic reaction occurs.
Autoimmune conditions (use with caution) — Selank's immunomodulatory effects could theoretically influence autoimmune processes. Consult a physician before use if you have an autoimmune condition.
Concurrent use of strong GABAergic drugs — while Selank is not a direct GABA agonist, its GABA-modulating effects may interact with benzodiazepines, barbiturates, or other GABAergic medications. Consult a physician.
Active nasal infections or severe nasal polyps (intranasal route) — compromised nasal mucosa may reduce absorption and increase irritation. Consider subcutaneous administration instead.

When to Stop or Reduce Dose

Persistent fatigue that does not resolve with dose reduction
Headaches that continue beyond the first few days of use
Any signs of allergic reaction (rash, hives, swelling, difficulty breathing)
Significant mood changes or emotional blunting not present before use
Any symptom that feels unusual or concerning — err on the side of caution

Regulatory Status: Selank is approved in Russia as a prescription anxiolytic (Selank 0.15% nasal spray). It is not FDA-approved in the United States and is not approved by the EMA in Europe. In most Western countries, it is classified as a research peptide. It is not listed as a controlled substance in most jurisdictions, but regulations vary — verify your local laws before purchasing.

Common Selank Dosing Mistakes

Avoid these common errors to get the most out of your Selank protocol:

Using incorrect intranasal technique: Selank’s intranasal bioavailability depends on proper application. Spraying against the nasal septum rather than the outer wall, sniffing too hard (which sends the peptide into the throat), or blowing the nose immediately after application all reduce absorption. Tilt the head slightly forward, spray gently into each nostril aiming for the lateral wall, and avoid sniffing forcefully for at least 30 seconds.

Expecting immediate long-term cognitive effects: While Selank’s anxiolytic effects onset within minutes, the nootropic and BDNF-mediated cognitive benefits develop over 1–2 weeks of consistent daily use. Stopping after 2–3 days because “it’s not working” for cognition misses the point — neuroplasticity changes require sustained BDNF upregulation, not a single dose.

Storing reconstituted Selank at room temperature: Selank is a peptide that degrades when improperly stored. Reconstituted solution should be refrigerated (2–8°C / 36–46°F) and used within 4–6 weeks. Leaving it at room temperature significantly accelerates degradation. Lyophilized (powder) form can be stored longer at room temperature but is still best refrigerated.

Using excessively high doses: Selank has a flat dose-response curve above approximately 500 mcg intranasally. Higher doses do not produce proportionally greater anxiolytic or nootropic effects but can increase the likelihood of fatigue and headache. If 250–500 mcg is not producing desired effects, the issue is likely not the dose — consider administration technique, product quality, or stacking rather than escalating dose.

Confusing Selank with NA-Selank dosing: NA-Selank (N-Acetyl Selank) has greater metabolic stability and longer duration of action. Using Selank doses for NA-Selank may result in unnecessary overexposure, while using NA-Selank doses for regular Selank may result in under-dosing due to faster degradation. Know which form you have and dose accordingly.

Not maintaining consistent daily dosing: Selank’s BDNF upregulation and neuromodulatory effects are cumulative. Sporadic, occasional use will produce acute anxiolytic relief but will not deliver the full nootropic and neuroprotective benefits. Consistent daily dosing for 2–4 weeks is needed to realize the neuroplasticity-driven cognitive improvements.

Neglecting nasal hygiene for intranasal use: Nasal congestion, inflammation, or excessive mucus significantly reduces intranasal absorption. Using Selank when you have a cold or severe allergies diminishes effectiveness. Clear nasal passages before administration. If nasal congestion is chronic, consider subcutaneous administration as an alternative route.

Stacking multiple anxiolytics without reason: Combining Selank with phenibut, benzodiazepines, or other GABAergic compounds simultaneously is unnecessary and potentially counterproductive. Selank’s GABA modulation is subtle and non-sedating. Adding heavy GABAergic agents negates the ‘clean’ anxiolytic advantage. If stronger anxiolysis is needed, adjust Selank dosing or frequency first before layering additional GABAergic substances.

Frequently Asked Questions

Key Takeaways

Selank is an anxiolytic nootropic peptide — it reduces anxiety comparable to benzodiazepines without sedation, cognitive impairment, or addiction potential
Standard dose: 250–500 mcg intranasally, 1–3x daily — or 100–300 mcg subcutaneously for those who prefer injection
Intranasal is the preferred route — rapid onset (10–30 minutes), direct CNS access via olfactory pathway, and non-invasive convenience
BDNF upregulation is cumulative — nootropic and neuroprotective effects develop over 1–2 weeks of consistent daily use, not from a single dose
Gold standard stack: Selank + Semax for complementary BDNF + NGF neurotrophic support and combined anxiolytic-nootropic effects
No tolerance, dependence, or withdrawal — unlike benzodiazepines. Cycling is recommended (2–4 weeks on, 1–2 weeks off) but not strictly mandatory
Immunomodulatory properties — derived from tuftsin; modulates IL-6 and interferon pathways independently of anxiolytic effects
Very favorable safety profile — minimal side effects (mild nasal irritation, occasional fatigue at high doses). One of the most well-tolerated research peptides available
Approved in Russia as a prescription anxiolytic (Selank 0.15% nasal spray) — provides a pharmaceutical reference point for dosing and safety
Not FDA-approved — classified as a research peptide in most Western countries. Check local regulations before purchasing.

This article is for educational and informational purposes only. See our Disclaimer.

References

Seredenin SB, et al. “Anxiolytic effect of peptide preparation Selank.” Bull Exp Biol Med. 1998;126(1):643-645.
Kozlovskaya MM, et al. “The anxiolytic-like and nootropic effects of Selank.” Vestn Ross Akad Med Nauk. 2002;(8):36-40.
Semenova TP, et al. “Effect of Selank on cognitive processes after damage to the catecholamine system of the brain in rats.” Bull Exp Biol Med. 2007;144(5):689-691. PubMed
Ershov FI, et al. “Antiviral activity of immunomodulatory peptide Selank in experimental influenza infection.” Bull Exp Biol Med. 2009;148(3):426-429. PubMed
Zozulya AA, et al. “The inhibitory effect of Selank on enkephalin-degrading enzymes as a possible mechanism of its anxiolytic activity.” Bull Exp Biol Med. 2001;131(4):315-317. PubMed
Uchakina ON, et al. “Immunomodulatory and anti-inflammatory effect of the peptide Selank.” Russ J Immunol. 2008;2(11):249-254. PubMed
Seredenin SB, et al. “Selank and short peptides of the tuftsin family in the regulation of adaptive behavior in stress.” Neurosci Behav Physiol. 2008;38(8):853-857. PubMed
Kozlovskii II, Danchev ND. “Optimizing pharmacotherapy of anxiety disorders with Selank.” Neurosci Behav Physiol. 2006;36(6):639-643.
Volkova A, et al. “Selank administration affects the expression of some genes involved in GABAergic neurotransmission.” Front Pharmacol. 2016;7:31. PubMed
Medvedeva EV, et al. “The peptide Selank affects the expression of neurotrophic factor genes in the rat hippocampus.” Bull Exp Biol Med. 2013;155(5):625-627.

Next Steps

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Selank Dosage Guide

Selank

What Is Selank?

Key Characteristics:

How Selank Dosage Is Determined

Russian Pharmaceutical Data

Preclinical Pharmacology

Enkephalin Stabilization

Immune Modulation Research

Standard Selank Dosage Ranges

Intranasal Dosage by Experience Level

Subcutaneous Dosage by Experience Level

Administration Timing

Intranasal vs. Subcutaneous Administration

Intranasal Administration Tips

Calculate Your Selank Dose

Worked Example (Subcutaneous):

Quick Reference — 5 mg Vial (Subcutaneous)

Intranasal Reconstitution Note:

Skip the Math — Use Our

Selank Dosage by Goal

Anxiety Reduction & Stress Management

Cognitive Enhancement & BDNF Upregulation

Immune Modulation & Recovery Support

Neuroprotection & Brain Health

Cycling Protocols

Cycling Protocols

Why Cycle Even Without Tolerance?

Selank Stacking Protocols

Selank + Semax — The Russian Nootropic Stack (Gold Standard)

Selank + BPC-157 (Neuro + Gut Axis Support)

Selank + NA-Selank (Standard + Acetylated for Extended Coverage)

Full Neuropeptide Stack: Selank + Semax + BPC-157

Safety, Side Effects & Contraindications

Common Side Effects

Contraindications

When to Stop or Reduce Dose

Common Selank Dosing Mistakes

Frequently Asked Questions

What is the standard Selank dosage?

How does Selank compare to benzodiazepines for anxiety?

Is Selank the same as Semax?

How quickly does Selank work?

Does Selank cause sedation or drowsiness?

Can Selank be taken long-term?

What is the difference between Selank and NA-Selank?

Does Selank really increase BDNF?

Is Selank approved for medical use anywhere?

Can Selank help with immune function?

What is the best time of day to take Selank?

Key Takeaways

References

Next Steps

Semax Dosage Guide

Dosage Calculator

Peptide Directory

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