Cortexin
Also known as: Cortexin
Cortexin is a polypeptide complex extracted from cerebral cortex tissue, used clinically in Russia and several other countries as a neuroprotective and nootropic agent. In Western markets it is sold as a research chemical. (Cortexin is a registered polypeptide drug in some countries; presented here for educational/research reference only, not as medical guidance.)
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Mechanism of Action
Cortexin is a low-molecular-weight mixture of neuropeptides and amino acids derived from bovine or porcine cerebral cortex. It is proposed to exert tissue-specific neurotrophic and neuroprotective effects by modulating the balance of excitatory and inhibitory amino acids, reducing glutamate excitotoxicity, and lowering oxidative stress and free-radical damage in neurons. Experimental and clinical reports also describe upregulation of neurotrophic factors and improved bioelectrical activity of the brain, supporting its use in ischemic, traumatic, and cognitive disorders.
- Half-life
- Not precisely defined; peptide components are short-lived (cleared within hours)
- Administration Routes
- intramuscular
- Research Status
- Research Chemical
Reported Benefits
- Neuroprotective effects in ischemic and traumatic brain injury models
- Reported improvement in memory and cognitive function
- Antioxidant activity reducing neuronal oxidative stress
- Studied as supportive therapy in pediatric and adult neurology
Potential Side Effects
- Possible injection-site pain or irritation
- Allergic or hypersensitivity reactions (animal-derived product)
- Headache or agitation reported in some patients
- Theoretical risk associated with animal tissue sourcing
Common Dosing
For research use only and not medical advice: clinical product literature for Cortexin describes intramuscular courses of approximately 10 mg per day for around 10 days. This is provided as historical reference, not personal dosing guidance.
The dosing information above is aggregated from research literature and anecdotal community reports for educational purposes only. It is not a recommendation, prescription, or medical advice. Peptides are sold as research chemicals only and are not intended for human use.
Contraindications
- Known hypersensitivity to the product or animal-derived peptides
- Pregnancy or breastfeeding (insufficient safety data)
- Use without appropriate medical or research oversight
N-Acetyl Semax Amidate
N-Acetyl Semax Amidate is a stabilized analog of the ACTH(4-10)-derived nootropic peptide Semax, modified for durability and intranasal use. It is studied for cognition, focus, and neuroprotection.
P21 (P021)
P21 (P021) is a small peptidergic compound derived from the active region of ciliary neurotrophic factor, studied for promoting neurogenesis and synaptic plasticity. It is researched preclinically as a neuroprotective and cognition-enhancing agent.
Cerebrolysin
A peptide preparation derived from porcine brain tissue with neurotrophic and neuroprotective properties, used clinically in several countries for stroke, dementia, and traumatic brain injury.
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The efficacy and safety of animal-derived nootropics in cognitive disorders: Systematic review and meta-analysis
2021
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[Cortexin in the comprehensive treatment of neurological complications of type 2 diabetes mellitus. (Results of the DIACORT multicenter randomized clinical trial)]
2026
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Neuroprotective action of Cortexin, Cerebrolysin and Actovegin in acute or chronic brain ischemia in rats
2021
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Cortexin modulates OPG/RANK/RANKL and TRPC1 expression in cerebral ischemia-reperfusion injury
2026