Side-by-Side Comparison · 2026

Neuroxelin vs Semax Amidate

Neuroxelin vs Semax Amidate — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Neuroxelin
Cognitive & Neurological

Neuroxelin is a vendor nootropic peptide blend containing PE-22-28 (10 mg), Pinealon (10 mg), N-Acetyl Semax (20 mg), and N-Acetyl Selank (8 mg), formulated for intranasal administration. It combines four cognitively-active peptides targeting different aspects of brain performanc...

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Semax Amidate
Cognitive & Neurological

Semax Amidate (Semax-NH2) is Semax with C-terminal amidation - the addition of an amide group (-NH2) replacing the C-terminal carboxyl group (-COOH). This modification protects against carboxypeptidase degradation in nasal tissue, extending half-life and improving CNS bioavailabi...

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Key Parameters
Parameter Neuroxelin Semax Amidate
Category Cognitive & Neurological Cognitive & Neurological
Research Vendor Blend Research Use
Half-Life - ~6 hours (estimated)
Typical Dose - 100–400 µg
Frequency - Once or twice daily
Route Intranasal Intranasal
FDA Status Not Approved Not Approved

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Frequently Asked Questions
What is the difference between Neuroxelin and Semax Amidate?
Neuroxelin: Neuroxelin is a vendor nootropic peptide blend containing PE-22-28 (10 mg), Pinealon (10 mg), N-Acetyl Semax (20 mg), and N-Acetyl Selank (8 mg), formulated for intranasal administration. It combines ... Semax Amidate: Semax Amidate (Semax-NH2) is Semax with C-terminal amidation - the addition of an amide group (-NH2) replacing the C-terminal carboxyl group (-COOH). This modification protects against carboxypeptidas...
Which has a longer half-life, Neuroxelin or Semax Amidate?
Neuroxelin half-life: unknown. Semax Amidate half-life: ~6 hours (estimated).
Can you stack Neuroxelin and Semax Amidate?
Neuroxelin and Semax Amidate are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.