Cognitive & NootropicResearch Chemical

Semax

Also known as: ACTH 4-7 analog, Cognitive enhancer peptide, Neuropeptide Semax

BDNF-boosting cognitive enhancer — improves memory, focus, and neuroprotection.

Intranasal spray Subcutaneous injection

Molecular structure image coming soon

Research use only in the US. Approved in Russia. May cause transient anxiety at higher doses.

Overview

Semax is a synthetic heptapeptide based on the ACTH 4-10 fragment, developed and approved in Russia for neurological conditions including stroke, cognitive impairment, and optic nerve disease. It is a potent stimulator of BDNF and NGF (nerve growth factor), making it one of the most studied neuroprotective and cognitive-enhancing peptides available.

Mechanism of Action

Semax increases BDNF and NGF synthesis in the brain, promoting neuronal growth, survival, and synaptic plasticity. It also modulates dopaminergic and serotonergic systems, stimulates melanocortin receptors, and exerts anti-inflammatory effects in neural tissue.

Use Cases

  • Cognitive enhancement and memory
  • Focus and attention (ADHD support)
  • Neuroprotection after stroke or TBI
  • Depression and mood support
  • Optic nerve conditions
  • Neurodegenerative disease support

Research Summary

Approved in Russia for ischemic stroke, TBI, optic nerve disease, and cognitive decline. Multiple RCTs demonstrate significant cognitive improvements and neuroprotection. One of the most prescribed neuropeptide treatments in Russian clinical medicine for over 20 years.

Typical Dosing

100–300 mcg intranasal, 1–2x daily. N-Acetyl Semax version extends half-life.

Administration

Intranasal spraySubcutaneous injection

Research Chemical

Research use only in the US. Approved in Russia. May cause transient anxiety at higher doses.

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