How It Works
Semax is a synthetic heptapeptide analog of the adrenocorticotropic hormone (ACTH) fragment 4-10, with the sequence Met-Glu-His-Phe-Pro-Gly-Pro. Developed at the Institute of Molecular Genetics of the Russian Academy of Sciences, it has been approved in Russia since the 1990s for treatment of stroke, cognitive disorders, and optic nerve atrophy.
Semax works through several key mechanisms. It increases brain-derived neurotrophic factor (BDNF) expression in the hippocampus and frontal cortex in a dose-dependent manner. BDNF is critical for neuronal survival, synaptic plasticity, and long-term memory formation. Additionally, Semax modulates dopaminergic and serotonergic neurotransmission, which contributes to improved focus, motivation, and mood.
The peptide also exhibits neuroprotective properties, reducing oxidative stress and neuroinflammation. In cerebral ischemia models, Semax has demonstrated the ability to reduce infarct size and improve neurological recovery.
Benefits
- Enhanced cognitive function — improved memory, focus, and mental clarity in clinical observations
- Neuroprotective effects — demonstrated in stroke and ischemic injury models
- Increased BDNF expression — supports neuroplasticity and long-term learning
- Modulation of dopamine and serotonin — may improve motivation and mood
- Treatment of optic nerve atrophy — approved indication in Russia
Side Effects
- Generally well-tolerated with a favorable safety profile based on decades of clinical use in Russia
- Nasal irritation — common with intranasal administration
- Mild headache — occasionally reported
- Dizziness — rare
- Hair loss — anecdotally reported at higher doses (potentially related to melanocortin signaling)
- No significant organ toxicity or dependency reported in published literature
Dosing Protocol
| Parameter | Details |
|---|---|
| Standard Dose | 200-600mcg per administration |
| Frequency | 1-2 times daily |
| Administration | Intranasal spray (preferred) or subcutaneous injection |
| Cycle Length | 4-8 weeks on, 2-4 weeks off |
| Titration | Start at 200mcg and increase based on response |
What You Will Need
- Semax nasal spray (0.1% solution, typically 3mg/mL) or lyophilized vial for injection
- Bacteriostatic water (if reconstituting for injection)
- Insulin syringes (for subcutaneous injection route)
- Alcohol swabs