Cortexin Dosage Chart - Peptide Dosages

Cortexin (10 mg) Dosage Protocol

A lyophilized complex of water-soluble polypeptide fractions from bovine and porcine cerebral cortex, studied for stroke recovery, brain injury and cognition. A registered prescription drug in Russia — not approved in the West, and not a defined single molecule.

An incompletely characterized mixture of neuropeptides, amino acids and trace elements. In vitro it binds AMPA (80%), kainate (74%), mGluR1, GABA-A1 and mGluR5 receptors, pointing to glutamatergic and GABAergic action; it crosses the blood-brain barrier in mice at 6-8% of blood levels.

The registered Russian convention: the entire 10 mg vial once daily intramuscularly for a 10-day course, dosed before ~3 p.m., repeated only after 3-6 months. Not titrated, not continuous.

Registered in Russia only; not FDA-approved. Consistent animal ischemia data, but the human literature is predominantly Russian-language and often uncontrolled.

Quickstart Highlights

Cortexin is not a single peptide — it is a lyophilized complex of water-soluble polypeptide fractions extracted from the cerebral cortex of cattle and pigs, stabilized with glycine, and manufactured in Russia[2]. Developed at the Military Medical Academy in 1986[6], it is a registered prescription drug in Russia given by intramuscular injection, and it is studied for stroke recovery, traumatic brain injury, cognitive decline and memory — which is what brings most people to it. It sits in the same category as Cerebrolysin: an animal-brain-derived neuropeptide preparation with a large Russian-language clinical literature and almost no Western one.

Two honest qualifications belong up front. First, because it is an extract rather than a defined molecule, its exact composition is not fully characterized — a batch is a mixture of neuropeptides, amino acids and trace elements, not a single sequence with a known structure[2]. Second, it is not FDA-approved and not approved anywhere in the West; the controlled evidence that exists is largely preclinical, and the human data are predominantly Russian-language, often open-label and unreplicated outside Russia. Everything below reflects the registered Russian dosing convention and is provided strictly for research and educational reference — not medical advice.

Mix & measure Cortexin · 10 mg

Pre-filled with this protocol’s recommended BAC water and documented starting dose — edit any field to run your own numbers.

Reconstitution math only — not dosing advice. U-100 syringe: 100 units = 1 mL. Full reconstitution guide → · Advanced calculator →

Supplies Needed

Everything a documented injectable protocol relies on. Note that Cortexin is given intramuscularly at a 1–2 mL volume, so a U-100 insulin syringe is used here for measurement reference — an intramuscular injection of that volume is not what a short insulin needle is designed for.

Protocol Overview

The supply math is the simplest on this site: one vial equals one dose, and one course equals 10 vials. The commercial Russian package is sold as a box of 10 vials for exactly this reason — the packaging is the protocol. A second course, if run at all, comes 3–6 months later and needs another 10.

There is no partial-vial economy to plan and no in-use window to track, because nothing is stored after reconstitution. What does need planning is the injection burden: ten consecutive intramuscular injections of 1–2 mL, which is why the labeled option of procaine as diluent exists at all.

Dosing Protocol

The registered Russian adult convention, converted to U-100 units at 5 mg/mL for reference. This documents an approved-elsewhere label; it is not a titration schedule and not clinical guidance.

Standard course (adult)

10 mg once daily × 10 days

200 units (2.0 mL) — the whole vial

Concentrated option

10 mg in 1 mL diluent

100 units (1.0 mL) — same dose, less volume

Timing

First half of the day, before ~3 p.m.

Label instruction — later dosing may disturb sleep

Repeat course

After 3–6 months

Pulsed, never continuous

Route

Intramuscular only

Not a subcutaneous peptide

Why Cortexin draws research interest

These are the directions researchers and the peptide community most often explore Cortexin for — so you know you’re in the right place. They describe what is being studied, not proven benefits, approved uses, or promised results.

An extract, not a molecule

Cortexin is a mixture of polypeptide fractions from animal cortex rather than a single defined sequence — so batch identity cannot be verified the way a synthetic peptide's can. That limitation is irreducible.

Cortexin vs Cerebrolysin

Both are animal-brain-derived neuropeptide preparations with large Russian-language literatures. In the one head-to-head rat ischemia study the two performed comparably, and both beat Actovegin.

Course-based, not continuous

Unusually for this site, the protocol is a defined 10-day course rather than an open-ended schedule — the commercial box of 10 vials is literally the protocol.

Evidence ranges from early laboratory work to clinical trials depending on the use — the sections below cover the actual data and sources.

Add 2.0 mL diluent to one 10 mg vial → 5 mg/mL; the entire 2 mL is one dose (200 U-100 units).

10 mg once daily — the whole vial. Not titrated, not split. A course is 10 consecutive days.

Intramuscular (not subcutaneous). The Russian label specifies dosing in the first half of the day, before ~3 p.m.

Investigational in the West. Registered in Russia only; preclinical data plus Russian-language clinical reports. Not FDA-approved.

Dosing & Reconstitution Guide

Cortexin’s dosing is defined by its registered Russian label rather than by research-market convention, which makes it one of the few compounds on this site where a real regulatory dosing standard exists — just not a Western one. The adult course is 10 mg intramuscularly once daily for 10 days, with a repeat course permitted after 3–6 months if needed. The instruction to dose before roughly 3 p.m. is part of the label, reflecting reports that later administration can interfere with sleep.

Standard / Gradual Approach

There is no titration with Cortexin, and that is a genuine structural difference from most peptides documented here. The unit of use is the vial and the unit of protocol is the 10-day course: 10 mg daily for 10 days, stop, and revisit in 3–6 months. Researchers do not ramp up, and there is no established maintenance dose — the pattern is pulsed, not continuous.

The reconstitution volume is the only real variable. The Russian instructions specify dissolving the vial in 1–2 mL and injecting the whole amount, directing the needle at the vial wall to avoid foaming. Notably, the registered diluents are 0.9% sodium chloride, water for injection, or 0.5% procaine (novocaine) — procaine being used specifically because a 2 mL intramuscular injection stings. Bacteriostatic water, the default for the peptides on this site, is a research-market substitution rather than the labeled diluent; anyone using procaine inherits procaine’s own contraindications and should treat that as a separate decision, not a detail.

Reconstitution Steps

Reconstitution is straightforward, but the volume math is the opposite of every other peptide here — you are preparing one whole-vial dose, not drawing a fraction.

▪Sanitize: Swab the vial stopper and the diluent vial with fresh alcohol pads and let them dry.

▪Add diluent slowly: Draw 1–2 mL and direct the needle against the inside wall of the vial — the label specifically calls this out to prevent foaming of the polypeptide solution.

▪Dissolve gently: Swirl; do not shake. The solution should clear quickly.

▪Use promptly: Unlike the multi-dose vials elsewhere on this site, a reconstituted Cortexin vial is a single dose prepared for immediate use — it is not stored and drawn from across days.

Storage Instructions

Store the lyophilized vials at room temperature or refrigerated per the package, away from light, until use. The dry polypeptide complex is stable; it is the reconstituted solution that is not intended to sit.

Reconstituted Cortexin is prepared as a single dose for immediate injection and is not kept for later — there is no 28-day bacteriostatic-water window to rely on here, because the labeled diluents (saline, water for injection, procaine) contain no preservative. Discard any prepared vial that is not used, and discard any solution that is cloudy or discolored.

Important Notes

The points below separate what Cortexin demonstrably is from what it is commonly claimed to be — the gap is wide enough to matter.

▪It is an extract, not a molecule: Cortexin is a mixture of water-soluble polypeptide fractions, amino acids and trace elements from animal cortex, and reviews note the preparation may also retain nucleoprotein complexes including chromatin elements with DNA fragments[2]. Batch-to-batch identity therefore cannot be verified by sequence the way a synthetic peptide’s can — this is a real and irreducible limitation.

▪Bovine/porcine brain origin: It is derived from the cerebral cortex of cattle and pigs. Animal-brain-derived neurological products face restrictions in Western markets, and sourcing is a legitimate concern independent of any efficacy question.

▪It does cross the blood-brain barrier — a little: Radiolabeled Cortexin crossed the blood-brain barrier in mice, reaching brain concentrations equal to only 6–8% of whole-blood concentrations[1]. That is a genuine measured finding, and also a modest number worth reading honestly rather than as confirmation.

▪The human evidence is weak by Western standards: The clinical literature is predominantly Russian-language and frequently open-label without a control group. A representative study treated 86 children and adolescents with epilepsy alongside their antiepileptic drugs and reported cognitive improvement in 65%[5] — an uncontrolled design in which improvement cannot be attributed to the drug. There is no large Western randomized controlled trial of Cortexin for any indication.

▪Read the comparative study’s affiliations: The most-cited English-language animal comparison of Cortexin, Cerebrolysin and Actovegin[1] includes authors affiliated with Pharm-Holding CJSC, a Russian pharmaceutical company. The work is published and peer-reviewed, but industry involvement in a study favoring the sponsor’s product class is exactly the kind of context an honest reader should weigh.

How This Works

Because Cortexin is a mixture, it has no single mechanism — and the honest framing is that its mechanism is partially characterized at best. The most informative work comes from a rat study of acute (middle cerebral artery occlusion) and chronic (carotid stenosis) brain ischemia, which also ran an in vitro receptor-binding panel. At 10 µg/mL, Cortexin showed high or moderate binding to AMPA receptors (80.1%), kainate receptors (73.5%), mGluR1 (49.0%), GABAA1 (44.0%) and mGluR5 (39.7%)[1]. In other words, whatever it does appears to run through glutamatergic and GABAergic signaling — the same excitatory/inhibitory balance that dominates ischemic and epileptic pathology.

In that same work, Cortexin at 1 or 3 mg/kg/day for 10 days improved recovery of neurological function and reduced sensorimotor and cognitive impairment in rats, cut the size of brain-tissue necrosis in acute ischemia, improved antioxidant-system function and limited neurodegenerative change in the chronic model — performing comparably to Cerebrolysin and better than Actovegin[1]. Supporting in vitro work found that Cortexin at 2–40 µg/mL protected cultured rat sensory neurons against high-glucose injury in a concentration-dependent manner[3], and a rabbit facial-nerve model found it reduced fibrotic and axonal degeneration comparably to methylprednisolone — though notably without producing a significant electromyographic difference between groups[4]. This is a coherent preclinical signal. It is not a demonstration of human benefit, and the distance between the two is the whole story with this compound.

Lifestyle Factors

The one practical variable the label itself names is timing: dosing in the first half of the day, before roughly 3 p.m., because later injections are associated with disturbed sleep. Given the glutamatergic binding profile[1], a mild stimulating effect is a plausible explanation and worth tracking.

Cortexin is studied in the context of real neurological conditions — stroke, brain injury, cognitive decline — and none of those should be self-managed. A 10-day course of an unapproved animal-brain extract is not a substitute for neurological evaluation, rehabilitation, or treatment of the underlying cause.

Potential Benefits & Side Effects

What the literature reports, with the evidence tier attached to each item. The preclinical work is reasonably consistent; the human work is largely uncontrolled and Russian-language, so none of the below is a demonstrated clinical benefit.

Reported Effects

▪Neuroprotection in ischemia (animal): Reduced necrosis size in acute brain ischemia, improved recovery of neurological function and reduced sensorimotor and cognitive impairment in rats, with improved antioxidant-system function — comparable to Cerebrolysin[1].

▪Studied for memory and attention: The core of its reputation. Russian reviews describe favorable effects on mnestic and cognitive function across patient groups[6] — review-level, largely uncontrolled evidence, not trial-grade proof.

▪Neuronal protection against metabolic injury (in vitro): Concentration-dependent protection of cultured rat sensory neurons against high-glucose insult, which the authors framed as warranting further in vivo study for diabetic peripheral neuropathy[3].

▪Nerve repair (animal): In traumatic facial-nerve paralysis in rabbits, reduced neural fibrotic degeneration, myelin and axonal degeneration and edema versus control — but with no significant improvement on electromyography[4].

▪Cognitive support alongside epilepsy treatment (uncontrolled human): In 86 children and adolescents with epilepsy given Cortexin with their antiepileptic drugs, cognitive improvement was reported in 65% with no aggravation of seizures in 95%[5] — open-label, so not attributable to the drug.

Common Side Effects

▪Injection-site pain: The most predictable issue — a 1–2 mL intramuscular injection repeated for 10 consecutive days. The Russian label’s option to use 0.5% procaine as the diluent exists precisely because of this.

▪Sleep disturbance / overstimulation: The basis for the label’s before-3 p.m. instruction; consistent with the compound’s glutamatergic receptor binding[1].

▪Procaine-related risk (if used as diluent): Procaine carries its own contraindications, allergy risk and age restrictions. Choosing it as a diluent means accepting a second drug’s safety profile, not just a more comfortable injection.

▪Allergic / immunogenic potential: This is an animal-tissue-derived protein mixture injected intramuscularly — a category with an inherent hypersensitivity risk that a synthetic single peptide does not carry to the same degree.

▪Unknown long-term safety and unverifiable identity: There is no Western long-term safety database, and because the product is an extract rather than a defined sequence, a Certificate of Analysis cannot confirm identity the way it can for a synthetic peptide. Counterfeit risk in the grey-market import channel is correspondingly high.

Injection Technique

Cortexin is an intramuscular injection, which is a different procedure from the subcutaneous protocols documented elsewhere on this site — deeper, into muscle, at a larger volume.

Pre-Injection Preparation

▪Wash hands; inspect the vial and confirm the powder is intact and the vial is undamaged.

▪Swab the stopper and injection site; let the alcohol dry fully.

▪Reconstitute with 1–2 mL against the vial wall, swirl until clear, and draw the entire volume — the dose is the whole vial, not a fraction of it.

Injection Procedure

▪Intramuscular administration targets muscle, not a subcutaneous skinfold — the standard sites are the deltoid or the outer upper quadrant of the gluteal muscle.

▪Inject slowly and steadily; a 2 mL volume delivered too quickly is the main source of pain.

▪Withdraw and apply light pressure with a clean swab.

Post-Injection Care

▪Drop the used syringe straight into a puncture-proof sharps container.

▪Alternate sides between days — ten consecutive injections into one site will not be tolerated well.

▪Discard the vial after the dose; nothing is retained for a later day. Record the course start date so the 3–6 month interval before any repeat is respected.

Recommended Source

For high-purity research peptides, we point researchers to Prime Lab Peptides for Cortexin (10 mg Vial).

Why Prime Lab Peptides?

▪Top-rated on Trustpilot: Independently reviewed as the highest-rated peptide lab on Trustpilot — making it the best current source in the USA.

▪Third-party tested: Every batch ships with a Certificate of Analysis (COA) confirming purity and composition.

▪Consistent quality: ISO-aligned manufacturing and handling keep product integrity reliable batch to batch.

▪Cold-chain integrity: Temperature-controlled shipping and storage across the whole fulfilment chain.

▪Research-grade purity: Fit for educational and research use that demands high-quality peptides.

Note: Product availability and specifications subject to change. Verify current product details on supplier website.

References

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Cortexin — frequently asked questions

Wipe the stopper with an alcohol swab, then inject your bacteriostatic water slowly down the inside wall of the vial. Let it sit and gently swirl until dissolved — never shake. Store the mixed vial in the refrigerator and draw doses with an insulin syringe. Use the calculator above to turn any dose into syringe units.

There is no single correct amount — more water simply spreads the same 10 mg of peptide across a larger volume, which makes small doses easier to measure accurately. 1 to 3 mL per vial is typical. Enter your chosen volume in the calculator above to see the resulting concentration and syringe units.

On a U-100 insulin syringe, 100 units equal 1 mL, so 1 unit equals 0.01 mL. The calculator above converts your draw volume into these units automatically so you can measure without doing the math by hand.

Keep the reconstituted vial refrigerated at roughly 2 to 8 degrees Celsius, away from light, and avoid freezing it. Reconstituted research peptides are generally used within a few weeks. Always follow the specific guidance supplied with your product.

Divide the vial strength of 10 mg by the amount you use per injection. The calculator above reports this as "doses per vial" the moment you enter a dose.

No. Cortexin is sold strictly for laboratory and research purposes and is not approved by the FDA or other regulators for human use. Everything on this page is research information, not medical advice — consult a licensed healthcare professional before any use.

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Written by Dr. Aimen Arij, PharmD

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