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N-Acetyl Semax Amidate

Well Researched

Enhanced Nootropic Peptide | Cognitive Enhancement & Neuroprotection

Aliases (6)

NASA · NASAm · NA-Semax-Amidate · N-Acetyl-Semax-Amidate · Ac-Met-Glu-His-Phe-Pro-Gly-Pro-NH2 · modified Semax (dual-protected)

TYPICAL DOSE

600-1200μg

Daily

ROUTE

Intranasal spray

Nasal spray

CYCLE

10-30 days

Typical duration

STORAGE

2-8°C

Refrigerated

Overview

What is N-Acetyl Semax Amidate?

N-Acetyl Semax Amidate (NASA, Semax Amidate) is a synthetic heptapeptide analog of ACTH(4-10) developed in Russia, with N-terminal acetylation and C-terminal amidation that extend metabolic stability and BBB penetration vs original Semax. It is used as a neuroprotective and cognitive-enhancing nootropic peptide.

Key Benefits

Reported to enhance memory, focus, and stress resilience with greater potency and longer duration than Semax due to peptidase resistance. Anecdotal effects include improved verbal recall, sustained attention, and mood elevation; used clinically in Russia for stroke recovery and cognitive impairment.

Mechanism of Action

Acts as a melanocortin receptor (MC4R, MC3R) agonist and increases brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) expression. Modulates dopaminergic and serotonergic systems and reduces enkephalin degradation, enhancing endogenous opioid tone.

Molecular Information

Type

Heptapeptide

Amino Acid Sequence:

Met-Glu-His-Phe-Pro-Gly-Pro

Research Indications

Most Effective

Monoamine modulation

increases dopamine and serotonin tone; reported MAO-B inhibition (mechanism unclear)

Effective

Enkephalinase inhibition

preserves endogenous opioid tone (likely the "mood-positive without euphoria" feel)

Peptide Interactions

adamax

Synergistic

Different mechanism (Adamax is dopamine-system focused via D2 modulation; NASA is BDNF/neurotrophin focused). Standard stacked protocol: Adamax 200 mcg intra…

selank

Synergistic

Anxiolytic peptide, complementary mechanism. NASA-AM + Selank-PRN is a classic combo for "default anxiolytic baseline + cognitive boost when needed." Selank …

cerebrolysin

Synergistic

Both are neurotrophic. Cerebrolysin cycles 2-4x/year would be the IM neurotrophic anchor; NASA daily is the cheap maintenance peptide between cycles. No know…

bromantane

Synergistic

Different mechanism (bromantane is dopaminergic adaptogen with anti-asthenic effect). Stacks fine; commonly co-administered in Russian protocols.

modafinil

Synergistic

No known interaction. Modafinil = wakefulness/executive; NASA = neurotrophic + mood. Different pathways, additive subjective benefit reported in nootropic co…

semax (regular)

Avoid

Functional duplication. Same active peptide sequence, same downstream pathway, different PK. Stacking these is just paying twice for the same effect. Pick one.

n-acetyl semax (without amidate)

Avoid

Same logic — functional duplication. The single-modification N-acetyl Semax is itself superseded by NASA.

monoamine releasers (very high-dose amphetamine, MDMA-class)

Avoid

Theoretical risk of compounding monoamine elevation; no documented interaction but conservative call.

MAOIs

Avoid

Theoretical (Semax has weak MAO-B effects). No documented interaction but worth flagging.

NA Selank Amidate

Synergistic

Excellent combination - Semax provides nootropic effects while Selank offers anxiolytic benefits for comprehensive cognitive support

BPC-157

Compatible

Different mechanisms with potential complementary neuroprotective benefits, no known adverse interactions

Lion's Mane

Compatible

Both enhance BDNF and neuroplasticity through different pathways, may provide additive cognitive benefits

Blood Pressure Medications

Monitor

Semax may affect vascular function; monitor blood pressure when combining with antihypertensives

MAO Inhibitors

Avoid

Semax affects neurotransmitter systems; combination with MAOIs may cause unpredictable effects

Quality Indicators

✓

White, fluffy lyophilized powder

High-quality NA Semax Amidate appears as fine, white powder that reconstitutes clearly without clumping

✓

Clear, colorless solution

Properly reconstituted solution should be crystal clear with no particles, cloudiness, or discoloration

✓

Third-party purity testing

Reputable suppliers provide certificates of analysis showing >98% purity and absence of contaminants

✗

Clumping or discoloration

Powder showing yellow/brown discoloration or clumping indicates degradation or poor storage conditions

✗

Cloudiness after reconstitution

Persistent cloudiness or particles may indicate contamination, degradation, or improper manufacturing

What to Expect

Onset
2-15 minutes intranasal. Faster perceived onset than regular Semax for some users; comparable for others.
Peak
~30-90 minutes in.

Side Effects & Safety

Side effect profile is nearly indistinguishable from Semax (because the pharmacology is the same downstream).

Common (>10% users):
- Mild nasal/throat irritation from the spray vehicle (benzalkonium chloride or similar preservative) — rotate nostrils, stay hydrated.
- Mild stim-like wakefulness if dosed late in the day → sleep disruption potential. Dose AM only.
Less common (1-10%):
- Mild headache (especially at higher doses or first few days).
- Increased anxiety / over-stimulation in anxiety-prone users (some Russian literature notes Semax can be activating in this subgroup).
- "Flat" or overclocked feeling if dose is too high.
- Mild irritability.
Rare-serious (<1% but worth knowing):
- No documented serious adverse events in human use of regular Semax. NASA has no human safety database; severe reporting bias.
- Theoretical: extended duration of action means any negative effect persists longer. If you have a bad reaction, plan for it to last hours not minutes.
Specific watch periods:
- First 7-14 days: monitor sleep quality, anxiety baseline, and mood. If dose-titration is causing issues, drop back.
- Long-term (>60 days continuous): no human data. Cycling is recommended on rationale-only basis.