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Reference only · Not medical advice · For adults 18+ · No dosing information is published here
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Cognitive / Nootropic

N-Acetyl Semax — reference

Nootropic/neuroprotective peptide (Semax analog).

Regulatory statusNot FDA-Approved
Published half-lifeExtended vs. Semax — marketed as ~2x longer, not independently verified
Evidence levelNot characterised
CategoryCognitive / Nootropic

Regulatory status

Not FDA-Approved. Not FDA-approved in the US; approved as a prescription drug in Russia.

Reported cautions

⚠ Worth knowing. Approved in Russia but not in the US or EU, and Western evidence is limited. Strength per spray varies widely between suppliers — set it in Cycle Builder or level estimates cannot be calculated.

Pharmacokinetics

Published figures give an elimination half-life of Extended vs. Semax — marketed as ~2x longer, not independently verified. N-acetylation is claimed to slow degradation; no rigorous published PK comparison found.

This figure is tagged Not characterised in our evidence system. No reliable human pharmacokinetic data was found for this compound. We publish that fact rather than a number borrowed from an unreliable source. Any estimated curve here would be fiction, and should be treated as such. You can see the shape this implies between doses in the Half-Life Visualizer, and compare it against every other compound in the Half-Life Data Table. Our sourcing page explains what each tier means.

Remember that an estimated curve is a model built from a population figure, not a measurement of your blood. Individual clearance varies, and for depot injections the figure describes release from the injection site rather than the compound clearing. Half-life explained →

What Peptide Plug does and does not publish

This page carries regulatory status, general context and published pharmacokinetics. It carries no dose, frequency or cycle information — that is a deliberate editorial line, because dosing is a clinical decision rather than reference data. We also do not sell, supply, source or link to vendors for any compound.

Frequently asked

Is N-Acetyl Semax FDA-approved?
Not FDA-Approved. Not FDA-approved in the US; approved as a prescription drug in Russia.
What is the half-life of N-Acetyl Semax?
Published figures give Extended vs. Semax — marketed as ~2x longer, not independently verified. N-acetylation is claimed to slow degradation; no rigorous published PK comparison found.
How reliable is that half-life figure?
It is tagged “Not characterised” in our system. No reliable human pharmacokinetic data was found for this compound. We publish that fact rather than a number borrowed from an unreliable source. Any estimated curve here would be fiction, and should be treated as such.
What cautions are associated with N-Acetyl Semax?
Approved in Russia but not in the US or EU, and Western evidence is limited. Strength per spray varies widely between suppliers — set it in Cycle Builder or level estimates cannot be calculated.
Does Peptide Plug publish dosing for N-Acetyl Semax?
No. This library publishes regulatory status, general context and pharmacokinetics only. Dose, frequency and cycle information is deliberately absent from these public pages — those are clinical decisions, not reference data.
Does Peptide Plug sell N-Acetyl Semax?
No. We do not sell, supply, source or link to vendors for any compound, and we have no affiliate arrangements with suppliers. Peptide Plug is a tracking and calculation tool.

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Reference information, not medical advice. This page describes regulatory status and published pharmacokinetics. It does not tell you whether to use this compound, how much to use, how often, or whether it is safe for you. Peptide Plug does not sell, supply or source any compound. Those decisions belong to you and a licensed clinician.

Part of the Peptide Plug research library · How we source our figures