Cortexin dosing & administration
Bovine cerebral cortex-derived polypeptide preparation with nootropic, neuroprotective, and antioxidant properties used clinically in Russia for cerebrovascular disorders, cognitive impairment, and pediatric neurology
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team
Dosing
How much do I take?
Intramuscular: An injection into a muscle, usually the thigh, shoulder, or buttock.
Bioavailability High — well absorbed into the bloodstream from the muscle.
10 mg
Frequency
Once daily
Duration
10 days per course; repeat in 3-6 months if needed
The standard adult dose per the manufacturer instructions. The 10 mg vial is dissolved in 1-2 mL of saline, water for injection, or 0.5% procaine and injected into a muscle. Children under 20 kg get 0.5 mg/kg. [6]
Timing
Best time to take
Morning administration is recommended to avoid potential agitation or sleep disturbance. If two injections per day are prescribed, give the second injection no later than mid-afternoon.
With food?
Administration is by injection and independent of food intake.
If stacking
If combining Cortexin with other peptides or supplements, space administrations by at least 15-30 minutes when possible. Consult with a healthcare provider before combining with prescription medications.
Adjusting your dose
Increase if
- You've tolerated the current dose for the recommended period without significant side effects
- Therapeutic goals haven't been met at the current dose level
- Your healthcare provider recommends dose escalation based on your response
- Lab work or clinical assessments support a higher dose
Decrease if
- Side effects are bothersome or impacting daily life despite management strategies
- You experience any signs of an adverse reaction
- Lab results indicate the need for dose reduction
- Your healthcare provider recommends a lower dose based on your response
Signs of right dose
- Therapeutic goals being met with minimal side effects
- Stable and consistent response to treatment
- Lab values or clinical markers trending in the right direction
- Good tolerance with manageable or absent side effects
Administration
How do I use it?
Reconstitution
What you need
Injection
Route
Subcutaneous injection (into the fatty tissue just under the skin)—allows for consistent absorption and can be self-administered at home after proper training
Best sites
Storage
Before reconstitution
Store Cortexin in the refrigerator at 36-46°F (2-8°C) in its original packaging. Protect from light and moisture. Do not freeze. Check the expiration date before use. Some formulations may be stored at room temperature for limited periods—check your specific product labeling.
After reconstitution
Once reconstituted, Cortexin should be kept refrigerated at 36-46°F (2-8°C) and used within the timeframe specified on your product labeling (typically 14-28 days). Label the vial with the reconstitution date. Do not use if the solution appears cloudy, discolored, or contains particles.
Signs of degradation — discard the vial
Sample daily schedule
As prescribed (once daily)
As prescribed by your healthcare provider injection
Site: Intramuscular (IM) injection—rotate sites if applicable
Maintain a consistent schedule for optimal results with Cortexin. Set reminders if needed. If you miss a dose, follow your healthcare provider's instructions—do not double up on doses to compensate.
Safety
Is it safe?
Side effects
Commonly reported: Injection site reactions, Headache, Dizziness, Nausea, Agitation or restlessness, Transient blood pressure changes
Less common: Allergic reactions
Stop and seek help if
- Severe or worsening side effects that don't improve with dose adjustment or supportive care
- Signs of an allergic reaction—rash, hives, swelling, or difficulty breathing
- Your healthcare provider recommends discontinuation based on your clinical response
- Development of any new medical condition that may be contraindicated with Cortexin
- Pregnancy or planning to become pregnant (unless specifically approved for use during pregnancy)
- Abnormal lab results or clinical markers that suggest adverse effects
Cortexin should only be started, adjusted, or discontinued under medical supervision. This information is for educational purposes only and does not replace professional medical advice. Never stop a prescribed treatment without consulting your healthcare provider first, as abrupt discontinuation may have consequences.
Published research
What the studies show
Gulyaeva NV · 2018
Cortexin works through multiple protective mechanisms: it balances the oxidative stress that damages aging brains, turns off destructive inflammatory proteins, and binds directly to key structural proteins in brain cells. This multi-pronged approach is what makes the peptide complex so effective at protecting neural tissue from damage.
Gomazkov OA · 2015
Cortexin's brain peptides act like a multi-tool repair kit, protecting neurons at every level from chemical signals between cells all the way up to controlling which genes get turned on in the nucleus. This comprehensive approach means the drug can protect the brain from damage in many different ways simultaneously.
Kurkin DV, Bakulin DA, Morkovin EI et al. · 2025
When given to developing animals with brain damage, Cortexin improved motor control and reduced structural brain injury whether injected into muscle or delivered rectally. Scientists proved the peptides actually enter the bloodstream and penetrate the brain's protective barrier using radioactive tracer studies.
Tyurenkov IN, Kurkin DV, Kalatanova AV et al. · 2020
Cortexin matched the memory-restoring power of Cerebrolysin in rats with chronic stroke-like brain damage, and the benefits lasted for 10 days even after treatment stopped. Both drugs fixed the damaged memory centers in the brain equally well, suggesting Cortexin is a potent alternative for brain ischemia.
Mashin VV, Belova LA, Kotova EY et al. · 2023
In a study of 801 patients with chronic blood flow problems to the brain, Cortexin combined with another treatment boosted mental test scores, melted away depression, and cut brain damage markers in half. This real-world evidence from hundreds of patients confirms the drug's brain-protecting power works in humans.
2020
Standard regimen: 10 mg intramuscularly once daily for 10 days for adults; children under 20 kg receive 0.5 mg/kg, children over 20 kg receive 10 mg, once daily for 10 days. A repeat course may follow in 3-6 months. Vial reconstituted in 1-2 mL of 0.5% procaine, water for injection, or 0.9% saline.
GEROPHARM; Vidal Russia · 2026
Official Russian label: polypeptides of cattle cerebral cortex, 10 mg per vial with 22 mg glycine as stabilizer; nootropic, neuroprotective and antioxidant action with modulation of neurotransmitter balance. Indications include stroke, traumatic brain injury and its sequelae, encephalopathies, cognitive disorders, epilepsy, developmental delays and cerebral palsy in combination therapy. Contraindicated in hypersensitivity and in pregnancy/lactation for lack of clinical data.
Kholin AA, Zavadenko NN, Il'ina ES, et al. · 2017
84 children aged 1-11 with cerebral palsy combined with epilepsy received cortexin 5-10 mg IM as add-on to antiepileptic drugs: seizure frequency more than halved with motor improvement in 36.9%, motor improvement alone in 17.8%, seizure reduction alone in 16.7%; aggravation in one patient (1.2%). The authors conclude cortexin demonstrated efficacy and safety as adjunctive therapy in this population.
Head to head
Cortexin compared
Want the full picture?
The complete Cortexin research profile: mechanism of action, clinical studies, effectiveness timeline, and FAQ.