Side-by-Side Comparison · 2026

Adamax vs N-Acetyl Semax

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

Adamax
Cognitive & Neurological

Adamax is a branded formulation of N-Acetyl Semax Amidate, the most potent and longest-acting analog of the nootropic peptide Semax. The N-acetyl modification at the N-terminus and amide modification at the C-terminus together extend its half-life and increase BDNF-stimulating po...

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N-Acetyl Semax
Cognitive & Neurological

N-Acetyl Semax is a modified form of Semax (the Russian-approved nootropic peptide based on ACTH(4-7)) with N-terminal acetylation added for improved enzymatic stability. The acetyl group protects against aminopeptidase degradation in nasal tissue, extending effective half-life a...

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Key Parameters
Parameter Adamax N-Acetyl Semax
Category Cognitive & Neurological Cognitive & Neurological
Research Research Use Research Use
Half-Life ~8–12 hours (extended vs. standard Semax) ~4–6 hours (extended vs. standard Semax)
Typical Dose 100–300 µg 100–400 µg
Frequency Once or twice daily 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 Adamax and N-Acetyl Semax?
Adamax: Adamax is a branded formulation of N-Acetyl Semax Amidate, the most potent and longest-acting analog of the nootropic peptide Semax. The N-acetyl modification at the N-terminus and amide modification ... N-Acetyl Semax: N-Acetyl Semax is a modified form of Semax (the Russian-approved nootropic peptide based on ACTH(4-7)) with N-terminal acetylation added for improved enzymatic stability. The acetyl group protects aga...
Which has a longer half-life, Adamax or N-Acetyl Semax?
Adamax half-life: ~8–12 hours (extended vs. standard Semax). N-Acetyl Semax half-life: ~4–6 hours (extended vs. standard Semax).
Can you stack Adamax and N-Acetyl Semax?
Adamax and N-Acetyl Semax 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.