Overview
Selank is a cognitive-focused compound. Synthetic heptapeptide analog of tuftsin.
With a half-life of ~3 minutes, Selank requires daily administration in most observed protocols. Taken orally, it has a bioavailability of approximately 95% via its primary route.
Half-life approximately 3 minutes, but downstream effects on GABA, serotonin, and dopamine pathways persist well beyond plasma clearance. Intranasal administration. One-compartment model.
Mechanism of Action
Selank's pharmacological activity involves the following key pathways:
Neurotrophin Modulation
Selank interacts with central nervous system pathways involved in neuroplasticity and cognitive function.
CNS Penetration
Selank reaches the central nervous system via intranasal administration, bypassing the blood-brain barrier.
Dosing Protocols
The following protocols represent commonly observed dosing patterns. These are observational summaries, not recommendations.
Dose
200 mcg
Route
Intranasal
Frequency
2-3 times daily
Duration
4-12 weeks
Dose
600 mcg
Route
Intranasal
Frequency
2-3 times daily
Duration
4-12 weeks
Reconstitution Steps
Selank is supplied as a lyophilized (freeze-dried) powder and requires reconstitution before use. Common vial sizes: 5 mg, 10 mg.
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1
Gather Supplies
You will need your Selank lyophilized powder vial, bacteriostatic water, a 1 mL syringe for transfer, a nasal spray bottle or insulin syringes (for SubQ use), and alcohol swabs.
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2
Swab Both Vials
Clean the rubber stopper on the Selank vial and the bacteriostatic water bottle with separate alcohol swabs. Allow both to air dry for 30 seconds before proceeding.
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3
Draw Bacteriostatic Water
For a 5 mg vial, draw 2 mL of bacteriostatic water to achieve a concentration of 2,500 mcg/mL. For a 10 mg vial, use 3 mL for a concentration of approximately 3,333 mcg/mL.
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4
Add Water to Vial
Insert the syringe at an angle and drip the water slowly down the inside wall of the vial. Do not inject directly onto the powder or shake vigorously. Allow the solution to sit undisturbed for 10–20 minutes until fully dissolved, gently rolling if particles remain.
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5
Transfer to Delivery Device
For nasal use, transfer the reconstituted solution into a clean nasal spray bottle (0.1 mL per spray = 250 mcg per spray at 2,500 mcg/mL concentration). For SubQ use, draw the required volume directly into an insulin syringe at the time of each dose.
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6
Label and Refrigerate
Label with concentration, reconstitution date, and a 28-day expiry. Store refrigerated at 2–8°C, protected from light. Do not freeze the reconstituted solution.
Quick Reconstitution Math
5 mg vial + 2 mL bac water = 2,500 mcg/mL. For a 250 mcg nasal dose, administer 1 spray (0.1 mL). For a 250 mcg SubQ dose, draw 10 units on a 100-unit insulin syringe. Use the Milligram reconstitution calculator for custom vial sizes.
Lyophilized Selank should be stored frozen at −20°C. After reconstitution, refrigerate at 2–8°C and use within 28 days. Avoid freeze-thaw cycles and direct light exposure.
Frequently Asked Questions
What is Selank and how does it work?
Selank is a synthetic heptapeptide (Thr-Lys-Pro-Arg-Pro-Gly-Pro) developed by the Institute of Molecular Genetics of the Russian Academy of Sciences and approved in Russia for generalized anxiety disorder and neurasthenia. It is thought to work through allosteric modulation of GABA-A receptors, which is also the pathway shared by benzodiazepines, without the dependence, sedation, or cognitive impairment associated with that drug class. Selank also rapidly elevates BDNF in the hippocampus and modulates serotonin and dopamine metabolism.
What is the half-life of Selank?
Selank has a very short plasma half-life of approximately 2–10 minutes for the parent compound. Despite this rapid clearance, its functional anxiolytic and cognitive effects have been observed to persist for 12–24 hours, which is attributed to downstream gene expression changes and sustained neurotransmitter modulation after initial receptor engagement. This extended functional duration makes once or twice daily dosing common in community protocols.
What is the difference between Selank and benzodiazepines?
Both Selank and benzodiazepines modulate GABA-A receptor activity, producing anxiolytic effects. However, Selank does not produce sedation, motor impairment, cognitive blunting, tolerance, or physical dependence – side effects frequently associated with benzodiazepine use. Selank also elevates BDNF and modulates serotonin, giving it an additional nootropic profile not seen with benzodiazepines. Clinical trials in Russia have demonstrated anxiolytic effects comparable to low-dose benzodiazepines with a substantially cleaner side effect profile.
How long does Selank take to work for anxiety?
Anxiolytic effects are commonly reported within 1–3 days of beginning a Selank protocol, and sometimes within the first few doses. This is considerably faster than the 4–8 week onset typically observed with SSRIs. The calming and stress-buffering effects of Selank are generally the first to appear, with any cognitive enhancement effects building over 1–2 weeks as BDNF levels accumulate. Full benefit from a standard cycle is typically reported within 2–4 weeks.
Can Selank be injected subcutaneously instead of using nasal spray?
SubQ injection is an alternative route for Selank that is commonly reported in community protocols. Typical subcutaneous doses range from 250–500 mcg once daily, which is somewhat lower than intranasal doses due to improved systemic bioavailability via injection. Intranasal administration is the clinically approved route in Russia and achieves rapid CNS delivery via nasal mucosal absorption. Both routes are widely observed in research and community settings.
Does Selank cause dependence or withdrawal?
Selank is not associated with physical dependence or withdrawal in the available literature and clinical trials. Unlike benzodiazepines, it does not appear to downregulate GABA receptors with repeated use, and discontinuation has not been observed to produce rebound anxiety or withdrawal symptoms in published research. A standard cycling protocol of 4 weeks on, 4 weeks off is commonly used to maintain sensitivity to its effects over time.