Side-by-Side Comparison · 2026

Adamax vs Semax Amidate

Adamax vs Semax Amidate — 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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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 Adamax Semax Amidate
Category Cognitive & Neurological Cognitive & Neurological
Research Research Use Research Use
Half-Life ~8–12 hours (extended vs. standard Semax) ~6 hours (estimated)
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 Semax Amidate?
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 ... 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, Adamax or Semax Amidate?
Adamax half-life: ~8–12 hours (extended vs. standard Semax). Semax Amidate half-life: ~6 hours (estimated).
Can you stack Adamax and Semax Amidate?
Adamax 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.