N-Acetyl Semax Amidate
Also known as: NA-Semax-Amidate, N-Acetyl Semax Amide
Enhanced version of Semax with N-Acetyl modification and C-terminal amidation. Provides stronger nootropic effects with better bioavailability and stability than standard Semax.
Research Status
Limited Clinical Data
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
May occur with intranasal administration, especially with higher doses or frequent use. Typically resolves within minutes. Mitigate by ensuring nasal passages are clear, using saline rinse before administration, and rotating nostrils.
Occasionally reported in the first few days of use. Usually self-resolving. May be related to increased cerebral blood flow or initial CNS stimulation. Ensure adequate hydration.
More likely if doses are taken late in the day. Avoid administration after 2-3 PM. If insomnia persists, reduce dose or frequency.
Some users report heightened mental stimulation, particularly at higher doses. This is generally considered a therapeutic effect but may be uncomfortable for sensitive individuals. Reduce dose if necessary.
Rare; may occur with prolonged daily use. Rotate nostrils and consider periodic breaks (e.g., 5 days on, 2 days off) to prevent chronic nasal irritation.
Rarely reported; more likely in individuals sensitive to stimulants or at doses exceeding 600 mcg daily. Reduce dose if this occurs.
Very rare but possible in individuals with peptide sensitivity. Discontinue immediately and seek medical attention if signs of anaphylaxis appear.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 200-600 mcg |
| Frequency | 1-2x daily |
| Timing | Morning and early afternoon for optimal cognitive benefit |
| Route | Subcutaneous |
Intranasal administration preferred for this peptide. Start at 200 mcg once daily and assess response before increasing frequency or dose. For research purposes only.
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline — use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2–8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
| Molecular weight | 547.6 |
| Half-life | 15-30 minutes (intranasal); longer CNS residence time due to direct brain delivery |
| Sequence | Ac-MPEF-NH2 (N-Acetyl-Met-Pro-Glu-Phe-Amide) |
N-Acetyl Semax Amidate is a synthetic analog of ACTH(4-10) with N-acetyl modification at the N-terminus and C-terminal amidation, which enhance stability and bioavailability. It acts as a nootropic by modulating neurotransmitter systems, promoting neuroprotection, and enhancing synaptic plasticity through multiple pathways including BDNF signaling and dopaminergic/adrenergic systems. The peptide crosses the blood-brain barrier via intranasal administration and supports cognitive function without direct hormone-like systemic effects.
BDNF and Neurotrophin Signaling
Semax enhances brain-derived neurotrophic factor (BDNF) expression and signaling, promoting neuronal survival, growth, and synaptic plasticity — critical for memory formation and learning
Dopaminergic and Noradrenergic Modulation
The peptide modulates dopamine and norepinephrine systems in the prefrontal cortex and striatum, enhancing attention, motivation, and executive function
Neuroprotection and Antioxidant Defense
Semax activates endogenous antioxidant systems and reduces oxidative stress in neural tissue, protecting against neurodegeneration and supporting long-term cognitive health
Stress Response Modulation
The peptide regulates HPA axis function and stress-induced neurochemical changes, reducing cognitive impairment under stress while maintaining alertness
- N-acetylation increases peptide stability and resistance to enzymatic degradation compared to native Semax
- C-terminal amidation enhances membrane permeability and bioavailability
- Intranasal administration bypasses the blood-brain barrier, delivering the peptide directly to the CNS
- Does not activate melanocortin receptors like full-length ACTH, avoiding systemic hormonal effects
- Effects are cumulative with repeated dosing; optimal cognitive benefits typically emerge after 2-4 weeks of consistent use
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View all peptidesResearch Use Only. All content on this page is provided for informational and educational purposes related to scientific research. N-Acetyl Semax Amidate is not approved for human use by the FDA or any equivalent regulatory body. This is not medical advice. Do not use any substance discussed here for therapeutic, diagnostic, or preventative purposes. Consult a qualified healthcare professional before making any health-related decisions. The Peptide Volt does not endorse the use of any research chemicals. 18+ only.