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Peptides/Semax
ACTH(4-10) analogue

Semax

Russian synthetic heptapeptide derived from ACTH; nootropic and neuroprotective claims.

Human observational · t½ Short · 200–600 mcg, 1–3× daily

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BHuman observationalHuman observationalACTH(4-10) analogue

Russian synthetic heptapeptide derived from ACTH; nootropic and neuroprotective claims.

Scientific Consensus Engine

Evidence Intelligence Score™

Heuristic — no indexed evidence yet
5.1/ 10
Overall confidence
Emerging
Outlook
Emerging
Evidence maturity
  1. Preclinical
  2. Pilot human← current
  3. RCT
  4. Multi-RCT
  5. Meta-analysis

Confidence aggregates eight dimensions of evidence — human data, safety maturity, mechanism, clinical readiness, momentum, consistency, long-term follow-up, and translational signal. It is a measure of what is known, not a recommendation. Methodology.

Eight-dimension breakdown
  1. Human evidence
    Weight of RCT and observational data
    6.3
  2. Safety maturity
    Follow-up depth and adverse-event signal
    5.3
  3. Mechanism confidence
    Pathway specificity and clarity
    6.4
  4. Clinical readiness
    Distance to physician-prescribable use
    5.4
  5. Research momentum
    Recency of indexed clinical evidence
    5.0
  6. Study consistency
    Effect direction across cohorts
    3.0
  7. Long-term data
    Follow-up beyond initial trial windows
    3.6
  8. Translational confidence
    Animal → human signal preservation
    6.1
Strongest supported claim

Early human signals exist, primarily from observational and pilot work — directional, not definitive.

Weakest / unclear

Translational confidence is limited until pre-registered human trials reproduce the preclinical signal.

Major unknowns

Interactions outside listed contraindications, long-term safety, and effect heterogeneity across age and sex are not fully resolved.

Scientific outlook

Outlook: directional. The next 12–24 months of registered trials will determine whether the early signal holds.

Mechanism
Modulates BDNF, dopamine, and serotonin systems; neuroprotective in stroke models.
Clinical evidence · 3 studies indexed

Cognition & focus

2 studies
  • ↑
    Neuroprotective and nootropic drug Noopept rescues α-synuclein amyloid cytotoxicity; Semax as analog of ACTH(4-10) for cognitive disorders
    Ashmarin IP, Nezavibatko VN, Levitskaya NG, et al.

    Intranasal Semax (heptapeptide ACTH 4-10 analog) showed nootropic effects on attention and memory in humans and improved recovery in ischemic stroke patients.

    Observational1995unreviewed
    weak
  • ↑
    Semax, an analog of ACTH(4-10) with cognitive effects: from in vitro and animal models to clinical trials
    Medvedeva EV, Dmitrieva VG, Povarova OV, et al.

    Semax modulates BDNF and dopaminergic systems; clinical use in Russia for ischemic stroke and cognitive disorders with reported attention and memory improvements.

    Preclinical2014unreviewed
    weak

Mood regulation

1 study
  • ↑
    Effects of the peptide Semax and its C-terminal fragment PGP on monoamine systems in rat brain
    Eremin KO, Kudrin VS, Saransaari P, et al.

    Semax increases extracellular dopamine and serotonin metabolism in rat striatum and frontal cortex, supporting reported antidepressant/anxiolytic-like effects.

    Preclinical2005unreviewed
    weak
Observed research protocols · 2 regimens

Cognition & focus

1 regimen
Clinical trialsource ↗

Generally well tolerated; mild local nasal irritation reported. Not approved outside Russia/CIS.

Outpatient cognitive courses typically 10–14 days; stroke protocols 5–10 days.

Mood regulation

1 regimen
Preclinicalsource ↗

Mild nasal irritation; long-term safety not established.

Limited human mood-specific RCT data; mechanism supported by preclinical neurochemistry.

These are observed research regimens drawn from approved labels, clinical trials, or preclinical literature — not dosing recommendations. Suggestive, never prescriptive.

Citations
  • Gusev et al., 2005 — Stroke
What we don't know yet
  • —Long-term safety beyond reported study durations.
  • —Effect size in populations under-represented in the cited trials.
  • —Interactions with concomitant medications outside listed contraindications.

We surface uncertainty next to every claim. Suggestive, never prescriptive — discuss with a clinician.

Editorial team
Independent · No affiliate revenue
Reviewed quarterly
Typical dose200–600 mcg, 1–3× daily
Half-lifeShort
RoutesIntranasal
Evidence tierHuman observational
Safety confidence
Short
Mid
Long-term

No indexed safety data yet — bars reflect editorial tier baseline.

Contraindications
  • — Pregnancy

Suggestive, never prescriptive. Discuss with a clinician.

Brands carrying this peptide

1 brand across three tiers.

Research-use only

1 brand

Sold by chemical suppliers labelled 'for laboratory research only — not for human consumption'. No pharmaceutical-grade QC, no medical oversight. Listed for transparency.

  • Amino Asylum Semax
    Amino Asylum
    30 mg lyophilised
    RUO
    →