NA Semax Amidate
Enhanced Nootropic Peptide · Cognitive Enhancement & Neuroprotection
Enhanced and stabilized version of Russian nootropic Semax with superior stability, extended half-life, and enhanced bioavailability through acetylation and amidation modifications.
Overview
Enhanced and stabilized version of Russian nootropic Semax with superior stability, extended half-life, and enhanced bioavailability through acetylation and amidation modifications.
Bypasses blood-brain barrier via olfactory nerves with direct brain access; enhances BDNF upregulation and hippocampal plasticity.
Research indications
What the compound has been studied for, grouped by body system. Effect size is the reported magnitude where it was measured — not a recommendation.
Rapid improvement in sustained attention, working memory, and mental clarity within 15-30 minutes.
Enhances both short-term and long-term memory consolidation through BDNF upregulation.
Significant improvement in cognitive performance during mental fatigue, with lasting effects.
Accelerates functional recovery through enhanced neuroplasticity and BDNF elevation.
Protects against neural oxidative damage and supports cellular repair mechanisms.
Rapidly increases BDNF and TrkB receptor expression, supporting neuronal survival.
Improves episodic memory formation and recall through default mode network optimization.
Enhances acquisition of new information through improved synaptic plasticity.
A large effect in a weak study and a small effect in a strong one are different things. Effect size is never evidence of use in people.
- Class
- Modified ACTH analog
- Chain length
- 7 residues
- Molecular weight
- 1007.16 Da
- Half-life
- ~6 h
- Typical dose
- 600-1200mcg per administration
- Frequency
- 1-2x daily for 10-30 days
- Cycle length
- 10-30 days
- Storage
- Refrigerate at 2-8°C
Molecular data
- Type
- Modified ACTH analog
- Molecular weight
- 1007.16 Da
- Chain length
- 7 residues
- Half-life
- 360 min
Dosing reference
Doses reported in the literature and by suppliers. These are a record of what has been used in research — reference, never instruction.
| Context | Route | Amount | Frequency |
|---|---|---|---|
| Cognitive enhancement | Intranasal spray | 600mcg | 1x daily |
| Mental fatigue resistance | Intranasal spray | 800mcg | 1x daily |
| Memory enhancement | Intranasal spray | 600mcg | 2x daily |
| Neuroprotection | Intranasal spray | 1200mcg | 1x daily |
| Research protocol | SubQ | 200mcg | 1x daily |
| Neuroprotection study | SubQ | 400mcg | 1x daily |
Interactions
Excellent combination providing comprehensive cognitive support with nootropic and anxiolytic benefits.
Different mechanisms with complementary neuroprotective benefits.
Both enhance BDNF and neuroplasticity; may provide additive cognitive benefits.
Both affect focus; combination may cause overstimulation in some individuals.
Monitor blood pressure as Semax may affect vascular function.
Semax affects neurotransmitter systems; combination may cause unpredictable effects.
Quality checklist
- ✓White, fluffy powder that reconstitutes clearly
- ✓Clear solution with no particles or cloudiness
- ✓Third-party purity testing certificates showing >98% purity
- !Ensure proper cold chain maintained during shipping
- ×Discolored powder (yellow or brown indicates degradation)
- ×Cloudiness after reconstitution indicates contamination
What to expect
Safety
- Mild nasal irritation (intranasal)
- Slight headache initially
- Persistent nasal irritation, burning, or bleeding
- Severe headaches or dizziness after administration
- Unusual mood changes, anxiety, or agitation
- Sleep disturbances or insomnia
- Any allergic reactions (swelling, rash, difficulty breathing)
- Significant changes in blood pressure or heart rate
- Not recommended during pregnancy
- Active nasal congestion or sinus infection
- Individuals on neurotransmitter-affecting medications without consultation
FAQ
What's the difference between NA-Semax Amidate and regular Semax?
NA-Semax Amidate (N-acetylated, C-terminal amidated) has enhanced stability and an extended half-life of 2-10 hours compared to regular Semax's 0.5-2 hours. The acetylation improves blood-brain barrier penetration and the amidation increases bioavailability, resulting in more sustained cognitive benefits.
How quickly does intranasal NA-Semax Amidate start working?
Onset is rapid: cognitive clarity and focus improvement begin within 15-30 minutes after intranasal administration. Peak effects occur at 1-2 hours, and cognitive benefits are maintained for 2-6 hours. This rapid onset makes it useful for acute cognitive demands.
Is NA-Semax Amidate safe for people with high blood pressure?
Caution is advised. The pharmacology flags indicate NA-Semax Amidate raises blood pressure. If you have hypertension, consult your healthcare provider before use. Monitor blood pressure if combining with blood pressure medications, as additive effects are possible.
Can I stack NA-Semax Amidate with other nootropics?
Yes, but carefully. It combines synergistically with NA-Selank Amidate for comprehensive cognitive and anxiolytic support. It's compatible with BPC-157 and Lion's Mane. However, avoid combining with MAO inhibitors, and monitor if combining with modafinil due to potential overstimulation.
References
- 1A Nootropic Adrenocorticotropin Analog 4-10 Semax: 15 Years Experience in Its Design and Study (Parent Compound)Ashmarin IP, Nezavibatko VN, Levitskaya NG, et al. · Zhurnal Vysshei Nervnoi Deiatelnosti imeni I.P. Pavlova · 1997
Foundational Semax review: intranasal doses stimulate operative memory and attention for 20-24 hours. Adamax builds on the Semax core sequence with adamantane modification for enhanced stability and BBB penetration.
reviewPubMed 9173745 ↗ - 2Semax, an Analog of ACTH(4-10), Regulates BDNF and trkB Expression in the Rat Hippocampus (Parent Compound)Dolotov OV, Karpenko EA, Inozemtseva LS, et al. · Brain Research · 2006
Single application at 50 mcg/kg produced 1.4-fold increase in BDNF protein and 1.6-fold increase in trkB tyrosine phosphorylation in rat hippocampus, supporting Adamax's BDNF-TrkB mechanism.
animalPubMed 16996037 ↗ - 3The Peptide Semax Affects the Expression of Genes Related to the Immune and Vascular Systems in Rat Brain Focal Ischemia (Parent Compound)Dergunova LV, Limborska SA, et al. · BMC Genomics · 2014
Genome-wide analysis: Semax modulated 24 vascular genes at 3h and enhanced immune-response gene expression at 24h post-ischemia, demonstrating multi-pathway neuroprotection.
animalPubMed 24661604 ↗ - 4Effects of Semax on the Default Mode Network of the Brain (Parent Compound)Dolgorukova AM, Klyushnik TP, Gusev EI, et al. · Bulletin of Experimental Biology and Medicine · 2018
24 healthy volunteers; resting-state fMRI showed increased default mode network volume in medial frontal cortex after intranasal 1% Semax vs placebo, enhancing episodic memory.
reviewPubMed 30225715 ↗ - 5The Efficacy of Semax in the Treatment of Patients at Different Stages of Ischemic Stroke (Parent Compound)Gusev EI, Barskov IV, et al. · Zhurnal Nevrologii i Psikhiatrii imeni S.S. Korsakova · 2018
110 ischemic stroke patients; Semax (6000 mcg/day intranasal) increased BDNF plasma levels and accelerated functional recovery, providing the clinical basis for Adamax neuroprotective applications.
reviewPubMed 29798983 ↗