
Selank (Injectable)
Anxiety & focus
All-in monthly price
No membership fee · this is the full price · free shipping · avg 4-week supply
Add in-depth bloodwork
Optional — add a physician-reviewed at-home blood panel to your plan.
Your sex-hormone baseline plus the safety markers that matter on therapy — blood counts, liver and kidney function — from one painless upper-arm device. Matched to your sex (PSA for men; progesterone & FSH for women). No needle, no clinic, physician-reviewed.
This treatment requires licensed provider review and approval. Treatment is not guaranteed. If prescribed, medication is fulfilled by a licensed U.S. pharmacy where permitted by law. Compounded medications are not FDA-approved or FDA-cleared.

Reviewed by Dr. Gene, MD · Board-certified Family Medicine
Every Pepti prescription is reviewed by a licensed U.S. physician before it's dispensed — and only provided if clinically appropriate.
Selank (Injectable)
A synthetic peptide analog of tuftsin that modulates GABA and serotonin for calm focus.
About a 4-week supply supply at the standard prescribed dose — your physician confirms exact dosing.
A licensed US physician reviews your intake and prescribes when appropriate.
Compounded fresh at a US pharmacy and shipped cold-chain to your door.
Every order ships free — medication, physician care and refills, one all-in price.
Amounts shown are per unit. Compounded fresh at a US FDA-registered pharmacy.
Every batch independently tested
Every medication batch dispensed through Pepti is independently tested by a qualified third-party laboratory for applicable quality and safety standards before the pharmacy releases it. Batches are tested to the same standard used by 503B outsourcing facilities.
Confirms the finished preparation is free of viable microorganisms.
Screens for endotoxins that can cause fever or inflammatory reactions.
Verifies the labeled concentration of the active peptide is what is in the vial.
- Lot 102626-SEL-1
Tested 2026-10-28 · Biolink Life Sciences Carolinas
Sterility
Sterile
Endotoxin
<2 EU/mL
Potency
99.6%
- Lot 102626-SEL-2
Tested 2026-10-28 · Biolink Life Sciences Carolinas
Sterility
Sterile
Endotoxin
<2 EU/mL
Potency
99.2%
- Lot 101926-SEL-1
Tested 2026-10-21 · Biolink Life Sciences Carolinas
Sterility
Sterile
Endotoxin
<2 EU/mL
Potency
99.4%
How Selank is prescribed.
- Adults with stress, anxiety or a racing mind their physician has evaluated
- People who want to feel calm without feeling sedated
- Anyone who wakes at night with their thoughts spinning
- Patients pairing it with Semax for calm plus focus
Your physician decides whether Selank is appropriate for you after reviewing your intake and labs.
Inject 0.25 mL (25 units) subcutaneously once daily Monday through Friday.
- Licensed physician review of your intake, history, and labs
- Medication compounded to your prescription by a PCAB-accredited, FDA-registered pharmacy
- Every batch independently tested before release
- Sterile syringes and alcohol prep pads for injectables
- Tracked delivery to your door, refills on schedule
- Message your physician anytime; dose changes without an appointment
- Store refrigerated (36–46°F / 2–8°C) at all times, including before first use.
- One vial is your monthly supply. A fresh vial ships every 28 days on your refill schedule, so you're always well inside the beyond-use date on your label.
- Protect from light. Wipe the stopper with an alcohol pad before every draw.
- Dispose of syringes in the sharps container per the included instructions.
A typical course of Selank.
Everything published
about Selank.
How it is described to work, pathway by pathway. What the research shows and what it does not. Where it stands with the FDA, dated and sourced.
Read the referencepeer-reviewed, each verified on PubMed
mechanism, evidence, dosing, safety, FAQ
2026 · checked against fda.gov, not memory
How Selank works, and what the research shows.
Selank is a synthetic analog of tuftsin that modulates GABA, serotonin, and dopamine.
It reduces anxiety without sedation and enhances focus.
Originally developed by Russian researchers and used by cosmonauts and military personnel.
References
- Kozlovskaya MM, Kozlovskii II, Val'dman EA et al.. Selank and short peptides of the tuftsin family in the regulation of adaptive behavior in stress · Neurosci Behav Physiol (2003) · PMID 14969422
- Zozulia AA, Neznamov GG, Siuniakov TS et al.. Efficacy and possible mechanisms of action of a new peptide anxiolytic selank in the therapy of generalized anxiety disorders and neurasthenia · Zh Nevrol Psikhiatr Im S S Korsakova (2008) · PMID 18454096
- Medvedev VE, Tereshchenko ON, Israelian AIu et al.. A comparison of the anxiolytic effect and tolerability of selank and phenazepam in the treatment of anxiety disorders · Zh Nevrol Psikhiatr Im S S Korsakova (2014) · PMID 25176261
- Medvedev VE, Tereshchenko ON, Kost NV et al.. Optimization of the treatment of anxiety disorders with selank · Zh Nevrol Psikhiatr Im S S Korsakova (2015) · PMID 26356395
- Uchakina ON, Uchakin PN, Miasoedov NF et al.. Immunomodulatory effects of selank in patients with anxiety-asthenic disorders · Zh Nevrol Psikhiatr Im S S Korsakova (2008) · PMID 18577961
- Zozulya AA, Kost NV, Sokolov OY et al.. The inhibitory effect of Selank on enkephalin-degrading enzymes as a possible mechanism of its anxiolytic activity · Bull Exp Biol Med (2001) · PMID 11550013
- Vyunova TV, Andreeva L, Shevchenko K, Myasoedov N. Peptide-based Anxiolytics: The Molecular Aspects of Heptapeptide Selank Biological Activity · Protein Pept Lett (2018) · PMID 30255741
- Volkova A, Shadrina M, Kolomin T et al.. Selank Administration Affects the Expression of Some Genes Involved in GABAergic Neurotransmission · Front Pharmacol (2016) · PMID 26924987
- Filatova E, Kasian A, Kolomin T et al.. GABA, Selank, and Olanzapine Affect the Expression of Genes Involved in GABAergic Neurotransmission in IMR-32 Cells · Front Pharmacol (2017) · PMID 28293190
- Inozemtseva LS, Karpenko EA, Dolotov OV et al.. Intranasal administration of the peptide Selank regulates BDNF expression in the rat hippocampus in vivo · Dokl Biol Sci (2008) · PMID 18841804
- Kolik LG, Nadorova AV, Antipova TA et al.. Selank, Peptide Analogue of Tuftsin, Protects Against Ethanol-Induced Memory Impairment by Regulating of BDNF Content in the Hippocampus and Prefrontal Cortex in Rats · Bull Exp Biol Med (2019) · PMID 31625062
- Doyno CR, White CM. Sedative-Hypnotic Agents That Impact Gamma-Aminobutyric Acid Receptors: Focus on Flunitrazepam, Gamma-Hydroxybutyric Acid, Phenibut, and Selank · J Clin Pharmacol (2021) · PMID 34396551
- Shiffman S, Stone AA, Hufford MR. Ecological momentary assessment · Annu Rev Clin Psychol (2008) · PMID 18509902
- Panikratova YR, Lebedeva IS, Sokolov OY et al.. Functional Connectomic Approach to Studying Selank and Semax Effects · Dokl Biol Sci (2020) · PMID 32342318
Citations are provided for educational purposes. They do not constitute medical advice. Always discuss any peptide protocol with your prescribing physician.
Important safety information
+
Possible side effects
Do not use if you have
If you experience severe side effects, call 911 or go to your nearest emergency room.
5 mL multi-dose vial, Selank 2 mg/mL (10 mg Selank per vial)
Frequently asked
about Selank (Injectable).
A synthetic peptide analog of tuftsin that modulates GABA and serotonin for calm focus. Selank is prescription-only at Pepti: a licensed physician reviews your assessment and, if appropriate, prescribes it to be compounded by a state-licensed, FDA-registered pharmacy.
Selank is $229 per month at Pepti. That is all-in: medication, physician review and ongoing care, shipping, and messaging. No membership, consult, or visit fees, and the price is the same in every state.
Selank is commonly prescribed for: Adults with stress, anxiety or a racing mind their physician has evaluated; People who want to feel calm without feeling sedated; Anyone who wakes at night with their thoughts spinning; Patients pairing it with Semax for calm plus focus. Whether it is appropriate for you is decided by the reviewing physician from your history, medications, and labs where required.
Yes. Selank is prescription-only. The free online assessment takes about five minutes, a physician licensed in your state reviews it within 4 hours, and if approved the prescription goes to the pharmacy. If not approved, the medication charge is refunded.
No. Selank can be prescribed from the assessment alone. If your physician wants labs for your care, they'll ask through your account; upload a recent lab report from any lab at no charge, or order Pepti's at-home panel.
Selank is a subcutaneous injection into the abdomen or thigh with a small insulin syringe. Your kit ships with sterile syringes and alcohol prep pads, and the exact dose and schedule are printed on the pharmacy label. Dosing videos are in your account.
32 more questions about Pepti, answered.Show fewer
One vial is your monthly supply at the dose your physician prescribes. A fresh vial ships about every 28 days, and the date moves if your physician changes your dose. Store it as the pharmacy label directs, refrigerated.
Once per fill, $229 each time, when the next vial ships. It renews until you cancel, which you can do anytime from your account with no cancellation fee.
The compounded Selank with sterile syringes and alcohol prep pads, free tracked shipping in an unbranded box with insulated packaging, the physician review, ongoing physician care and dose adjustments, and unlimited messaging.
Reported side effects of Selank are usually mild: mild nasal irritation (uncommon). The physician screens your history, medications, and allergies before prescribing, the medication-specific consent lists the known risks, and you can message your physician about anything you notice. Seek emergency care for severe symptoms.
Response varies by person, goal, and dose, and Selank is prescribed for ongoing use rather than a short trial. Your physician sets expectations at approval, tracks how you respond through your account, and adjusts the dose without an appointment.
Yes. Request it from your account or the app; your physician approves or declines. If approved you pay for the additional medication at the pharmacy's cost and the new dose applies to your next shipment.
Yes. Add Selank to a plan with another treatment and both go through one assessment and one physician review, shipping together on one schedule. Each keeps its own catalog price. The physician reviews the combination and can adjust it.
No. Compounded Selank is not FDA-approved. It is prepared to your physician's prescription by a state-licensed, FDA-registered 503A pharmacy and every batch is independently tested before release.
Yes, when prescribed by a licensed physician and dispensed by a licensed pharmacy, which is how Pepti provides it in every state it serves. Research-use-only Selank sold without a prescription is labeled not for human use and is a different product.
Selank is a synthetic analog of tuftsin that modulates GABA, serotonin, and dopamine. At Pepti it is prescribed to support anxiety reduction, mental clarity, focus enhancement, mood stabilization. Individual response varies, and your physician sets expectations at approval.
Selank is a synthetic analog of tuftsin that modulates GABA, serotonin, and dopamine. It reduces anxiety without sedation and enhances focus. Originally developed by Russian researchers and used by cosmonauts and military personnel. Compounded Selank is not FDA-approved; it is prescribed off-label by a licensed physician after reviewing your assessment.
Selank is prescribed for anxiety reduction, mental clarity, focus enhancement, mood stabilization. It is commonly requested by adults with stress, anxiety or a racing mind their physician has evaluated; people who want to feel calm without feeling sedated; Anyone who wakes at night with their thoughts spinning; patients pairing it with Semax for calm plus focus. Whether it is appropriate for you is the reviewing physician's decision.
Selank is studied for anxiety reduction, mental clarity, focus enhancement, mood stabilization. Those are the goals it is prescribed to support at Pepti; results vary by person, dose, and consistency, and no outcome is guaranteed. Your physician tracks how you respond through your account.
Selank is generally not prescribed with: active cancer or history of cancer (unless approved by oncologist); pregnancy or breastfeeding; severe kidney or liver disease; known allergy to the peptide or excipients. The physician screens for these in your intake, and anything that rules Selank out means it is not prescribed and is refunded.
At Pepti. Complete the free assessment, a physician licensed in your state reviews it within 4 hours, and if appropriate Selank is compounded by a state-licensed, FDA-registered pharmacy and shipped free to your door for $229 per month, all-in. Not prescribed means refunded.
Injectable vial: 5 mL at 2 mg/mL, containing 10 mg Selank. One vial is your monthly supply at the prescribed dose, and a fresh one ships about every 28 days.
Not currently. Selank ships as a multi-dose vial with sterile syringes and prep pads. The pepti Pen is available for 10 other treatments.
$229 per month covers the compounded Selank, the physician review, ongoing physician care including dose adjustments and refill review, unlimited messaging, and free tracked shipping. There is no membership, consult, visit, or refill fee; the only separate charges are optional at-home lab panels and a physician-approved dose increase billed at pharmacy cost.
Yes. Selank is on Pepti's live catalog, which lists only treatments a partner pharmacy can compound and ship today. If a physician prescribes it, it ships; if it ever cannot be dispensed, the charge is refunded.
Selank ships to 50 states, free and tracked, in insulated unbranded packaging. Eligibility is confirmed during the assessment from your shipping address.
$229 per month at Pepti. That includes the compounded Selank, the physician review and ongoing care, free tracked shipping, and messaging, with no membership, consult, or visit fee. The price is the same in every state and every refill is the same price.
Pepti supplies Selank as a monthly injectable vial with syringes and prep pads included, one vial per month at $229, prescribed by a licensed physician after a free online assessment and shipped free from a state-licensed, FDA-registered pharmacy in insulated packaging.
Yes. Pepti prescribes Selank online in 50 states after a free assessment reviewed by a physician licensed in your state. It is compounded by an FDA-registered pharmacy and shipped free, $229 per month all-in. Not prescribed means refunded.
Yes. At Pepti the entire process is telehealth: a five-minute online assessment, physician review within 4 hours, then Selank ships from the pharmacy. No clinic visit and no video appointment in most cases. $229 per month, all-in.
Yes, for the real thing. Selank sold without a prescription is research-use-only product labeled not for human use, with no physician, no pharmacy, and no verified testing. Pepti's Selank is physician-prescribed, pharmacy-compounded, batch-tested, and $229 per month including the physician and shipping.
Pepti does, in 50 states, with named board-certified physicians, a state-licensed FDA-registered compounding pharmacy, independent batch testing, and one published all-in price of $229 per month with no membership or consult fee. Refunded if the physician does not prescribe.
It is legal to be prescribed Selank online by a licensed physician and have it dispensed by a licensed pharmacy, which is how Pepti provides it. Buying it as a research chemical without a prescription is a different product and is not for human use. Compounded Selank is not FDA-approved.
$229 per month at Pepti, including the medication, the physician, and shipping. Refills are the same price and there is no membership fee.
Yes. Pepti has no clinics: the assessment, physician review, messaging, dose changes, and refills all happen online, and Selank ships free from the pharmacy to your door in 50 states.
Start the free assessment at hellopepti.com, choose Selank, and answer the health questions. A physician licensed in your state reviews it within 4 hours. If approved, Selank ships within 1-3 business days and arrives in 1-3 more; if not, the $229 is refunded.
No. Selank can be prescribed from the assessment alone at Pepti. If your physician wants labs for your care, they'll ask through your account; upload a lab report from any lab, or order a Pepti at-home panel from $129.
Pepti ships Selank to 50 states, free and tracked, refrigerated in insulated packaging, directly from the pharmacy. Delivery is 1-3 business days after the pharmacy compounds it.
Questions people ask
about Selank (Injectable).
- Selank: What It Is, Where to Get It Prescribed, and What It CostsSelank — 5 mL multi-dose vial, Selank 2 mg/mL (10 mg Selank per vial). Specification, mechanism, dosing, formats, state availability and how to get it prescribed.
- Selank vs Semax: Anxiety vs Focus, Evidence, Cost, and the Combined VialSelank and Semax are sibling peptides from the same Russian research programme, but one is described around calm and the other around focus. A side-by-side of what each is, how each is described to work, the human data, FDA status, dosing, price, and when the combined Semax + Selank vial makes sense.
- Selank Dosage: How Pepti Prescribes the Injection, in Units, mL and mgThe Selank dosage Pepti prescribes: 0.25 mL (25 units on a U-100 insulin syringe) under the skin once daily Monday through Friday, 0.5 mg per dose, 20 doses per vial. Includes a Selank dosage chart in units, mL and mg, every blend that contains Selank, timing, what the Russian trials used, and side effects.
- Selank Side Effects: What Is Reported, What to Report, and Who Should Not Take ItA practical reference to Selank side effects: injection-site reactions, early fatigue or a flat feeling, feeling wired, what the Russian trials found was absent (sedation, memory impairment, dependence, withdrawal), interactions that have not been studied, when to message your care team, and who should not take it.
- Selank Benefits: What the Research Actually ShowsThe benefits claimed for the Selank peptide, one at a time: anxiety, stress reactivity, focus and memory, benzodiazepine side effects, enkephalins, BDNF and immune markers, each labelled as cell, animal or human research, with an honest strength-of-evidence rating.
- Can You Take Selank With Tirzepatide or Semaglutide?Selank and tirzepatide act on unrelated systems and no interaction is described, but nobody has studied them together. Why GLP-1 side effects can feel like anxiety, the early fatigue overlap, psychiatric medication, the Selank blends, and how the schedules fit.
- How Long Does Selank Take to Work? What the Russian Trials Measured, and Over What PeriodHow long Selank takes to work has not been measured for the injectable form. This page sets out what the small Russian comparator trials measured over courses of weeks with the intranasal product, including an effect reported to persist about a week after the last dose, what the animal and cell work measured within hours, and how Selank is taken at Pepti.
- Do You Need a Prescription for Selank? Is It Legal to Buy Online?Yes: injectable Selank is a prescription medication in the US. What the law says, how Selank came off the FDA's Category 2 list in 2024, what "research use only" means, what a lawful prescription looks like, and what Pepti's vial costs.
- Best Place to Get Selank Online: How to Choose a PrescriberThe best place to get Selank online is a telehealth provider with a physician licensed in your state, a named licensed 503A pharmacy, published lot testing and one all-in price. A checklist for choosing a provider, the questions to ask, and what Pepti offers.
- Selank for Women: What the Research Has Looked At, and What to Check FirstWhat research has actually studied about Selank in women (no female-specific study exists), what the Russian anxiety trials did and did not show, perimenopause and the wired-but-tired state, the thyroid and iron causes worth ruling out first, pregnancy, birth control and hormone therapy, sedatives and alcohol, and how to get Selank prescribed.
- Selank for Men: What the Research Has Looked At, and What to Check FirstWhat research has actually studied about Selank in men (no male-specific study exists), what the Russian anxiety trials did and did not show, testosterone, sexual side effects and the benzodiazepine trial, alcohol, fertility, sport, and how to get Selank prescribed.
- Is Selank Banned in Sports? WADA Status, Blends and Drug TestsSelank is not named on the 2026 WADA Prohibited List, but the S0 catch-all covers unapproved substances that are not named, and every Pepti blend containing Selank also contains a named prohibited substance. What tested athletes should do, and why a workplace screen is a different question.
- Can You Drink Alcohol on Selank? What Is Known and What Is NotWhether alcohol and Selank interact, what the 2019 rat study on chronic ethanol and alcohol withdrawal actually tested, why it is not a hangover remedy or an alcohol treatment, the GABA and sleep points, the Selank blends that put drinking on the intake, and what to tell your physician.
- Peptides for Brain Fog and Focus: What Is Prescribed, and What WorksThe peptides used for brain fog and focus, what each one does in the brain, how they are taken, what they cost, and the medical causes worth ruling out first.
- How to get Selank prescribed online
- How Much Does Selank (Injectable) Cost?Selank (Injectable) cost in 2026: $229 per month all-in at Pepti — compounded medication, physician review, and shipping included. No membership or consult fees.
Read more about Selank (Injectable).
Semax + Selank: What It Is, Where to Get It Prescribed, and What It Costs
Semax + Selank — vial containing 1 mg Semax + 1 mg Selank. Specification, mechanism, dosing, formats, state availability and how to get it prescribed.
Selank: What It Is, Where to Get It Prescribed, and What It Costs
Selank — 5 mL multi-dose vial, Selank 2 mg/mL (10 mg Selank per vial). Specification, mechanism, dosing, formats, state availability and how to get it prescribed.
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