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A Semax Analogue

Adamax

A modified Semax-family research peptide designed around learning, memory and neuronal stress responses.

Brain health
TierF
EvidenceInsufficient
SafetyLimited Data
FDA statusNot Reviewed
Last reviewed October 25, 2026 11 citations How to read these labels

What is Adamax?

Adamax is the research-market name for a modified Semax peptide. Its usual description combines the Semax backbone with an acetyl group at the amino end and an adamantane-based group at the opposite end.[10][9][11]

Semax is a seven-amino-acid analogue built from part of adrenocorticotropic hormone, or ACTH. Interest in Adamax centers on learning, memory and the signals that help neurons adapt to stress and form new connections.[6][1]

The design focuses on the peptide’s end groups: acetylation changes the exposed amino end, while adamantane adds a rigid carbon cage. These features give Adamax its place among chemically modified cognitive peptides.[10][11]

What Adamax is investigated for

Adamax evidence is grouped by practical use case and route context. Each use case separates confidence, human evidence, animal or mechanistic support, and the practical takeaway.

BDNF and neuroplasticity

Mixed research context

5%Insufficient

BDNF signaling is a parent-peptide rationale for Adamax, rather than a measured Adamax effect.[1][8]

Human evidence

Adamax’s effects on BDNF and neuroplasticity in people remain unknown.[5][8]

Animal / mechanistic evidence

Parent Semax can influence BDNF and TrkB signaling, which help neurons maintain and adapt their connections.[1]

Learning and memory

Mixed research context

4%Insufficient

Learning and memory motivate the design, but improvement with Adamax has not been demonstrated.[6][1][3][8]

Human evidence

Human memory benefits have not been established for Adamax.[8][5]

Animal / mechanistic evidence

Related-peptide findings support interest in learning and memory; direct Adamax effects remain uncharacterized.[1][3]

Neuronal protection

Mixed research context

4%Insufficient

Neuronal protection is a proposed application. The acetylation findings show why the exact derivative needs its own experiments.[2][4][8]

Human evidence

Human neuroprotective benefits have not been established for Adamax.[8]

Animal / mechanistic evidence

Parent Semax has cell-protective findings, but acetylation can change that activity.[4][2]

Evidence snapshot

1%

Human evidence

Insufficient

Human benefits and side effects remain uncharacterized for Adamax.[8][5]

1%

Animal / preclinical

Insufficient

Related-peptide findings support interest in neuronal signaling and learning; direct Adamax effects remain uncharacterized.[1][4][3]

5%

Mechanism support

Insufficient

The proposed design combines Semax-related neuronal signaling with terminal modifications intended to change peptide stability and exposure. The modified molecule’s performance needs direct measurement.[1][11][2]

Forms & administration

Adamax is available as a research peptide powder, with preparation requirements specific to the product.[10]

Dosing & protocols

These ranges are general reference points, not personal dosing instructions.

Typical Range

An Adamax-specific dose range has not been established.[8]

Frequency

A repeat-dose schedule has not been established.[8]

Timing Considerations

Meal, work and sleep timing remain unspecified.[8]

Cycle Length

A course length or repeat-cycle interval has not been established.[8]

Safety profile

Product composition and neurological effects are the main practical safety questions. Adamax-specific adverse-event rates, interaction studies and long-term exposure data are unavailable. Research-supplier descriptions do not establish clinical tolerability.[6][8][10]

Cautions

What we don't know

Human side effects, medication interactions, reproductive safety and the effects of repeated exposure have not been characterized for Adamax. Semax or P21 tolerability cannot establish those outcomes.[8][6]

How it works

The proposed cognitive mechanism centers on Semax-related BDNF signaling. BDNF helps neurons maintain and strengthen their connections, providing a rationale for interest in learning and memory.[1]

Adamax’s described end groups add a chemical-design layer. Acetylation caps the amino end, while adamantane adds a rigid carbon cage. These modifications are intended to alter stability and tissue exposure.[10][11][3]

Chemical modifications can change biological activity as well as stability. Adamax’s own signaling and protective effects remain uncharacterized.[2]

Research gaps & open questions

What the current literature has not yet settled about Adamax:

01

The exact terminal chemistry needs independent characterization. The supplier-deposited nine-residue sequence and the adamantane-containing catalogue description are different structures; identifying the tested material would make experiments reproducible.[9][10]

02

Direct comparisons with Semax should measure how much intact Adamax reaches the brain and how quickly it leaves the body. This would clarify whether the modifications change delivery or duration.[11][1]

03

Controlled human studies should measure a defined cognitive or neurological outcome alongside adverse events. Parent-peptide BDNF changes do not establish memory improvement with Adamax.[5][1][8]

04

Repeated-exposure and interaction studies are needed for a characterized preparation. Chemical changes can alter activity, as illustrated by the different copper-binding and cellular effects of Semax and N-acetyl Semax.[2][8]

Common questions

How is Adamax related to Semax?

Adamax is marketed as a modified Semax analogue, usually described with N-terminal acetylation and an adamantane-based end group.[10][11]

What is the adamantane group for?

Adamantane is a rigid carbon cage used in peptide design to change chemical properties. Improved Adamax brain delivery or duration has not been measured.[11][3][8]

Has Adamax been studied in people?

Human benefits and side effects remain uncharacterized for Adamax.[8][5]

Is Adamax the same as P21 or P021?

No. P21/P021 is a CNTF-derived peptide with a different core. Its adamantane-containing design is related chemistry, not the same molecule.[10][3]

Does Adamax last longer than Semax?

Longer activity is a design goal; Adamax’s half-life and duration remain unestablished.[11][8]

History & discovery

Adamax sits within the research-market development of modified Semax peptides. Its design draws on ACTH-fragment signaling and on medicinal-chemistry approaches that change a peptide’s end groups. The dated documents below place that design in context.[6][11][1]

A published patent describes N-acetyl and adamantane-modified Semax derivatives in nasal formulations. Its examples test parent-peptide stability; it does not identify a tested Adamax product.[11]

A June Medsafe submission names Adamax and Semax as ACTH-analogue products marketed for cognitive enhancement, documenting the name’s place in the research-peptide market.[6]

Published research11 citations

Show citationsHide citations
[1]Semax, an analog of ACTH(4-10) with cognitive effects, regulates BDNF and trkB expression in the rat hippocampus.Brain research, 2006 Oct. animal.[2]Influence of the N-terminus acetylation of Semax, a synthetic analog of ACTH(4-10), on copper(II) and zinc(II) coordination and biological properties.J Inorg Biochem, 2016 Nov. in vitro.[3]Neurotrophic peptides incorporating adamantane improve learning and memory, promote neurogenesis and synaptic plasticity in mice.FEBS Lett, 2010 Aug 4. animal.[4]Semax, a Copper Chelator Peptide, Decreases the Cu(II)-Catalyzed ROS Production and Cytotoxicity of aβ by Metal Ion Stripping and Redox Silencing.Bioinorganic chemistry and applications, 2025. in vitro.[5][The efficacy of semax in the tretament of patients at different stages of ischemic stroke].Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova, 2018. human clinical.[6]Appendix B: Summary of proposed peptide group entriesMedsafe New Zealand. regulatory.[7]Drugs@FDA brand/generic name search for AdamaxU.S. Food and Drug Administration, Drugs@FDA via OpenFDA. database query.[8]PubMed exact-name search: Adamax[Title/Abstract] AND peptide[Title/Abstract]U.S. National Library of Medicine, PubMed. database query.[9]PubChem Substance 513899171: Adamax (supplier-deposited record)National Center for Biotechnology Information, PubChem. reference catalog.[10]Adamax, BAT-016517: research catalogue descriptionBOC Sciences. reference catalog.[11]WO2023046336A1: Adrenocorticotropic hormone peptide compositions and methods of useWorld Intellectual Property Organization / Ferring B.V., 2023-03-30. developer proposal.

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