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Lexicon

Cognition

NA-Semax-Amidate

The stabilized form of semax, a nootropic peptide that raises BDNF, for focus, clarity and neuronal protection.

1 min read 2 sources Calculator Updated May 2026
Class
Nootropic peptide (semax variant)
Use
Nasal or subcutaneous
Half-life
short (more stable than semax)
Status
Clinical data (Russia)

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Equipment

Equipment you need

For reconstitution and injection you need a bit of basic gear. Here are solid, cheap options:

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What is NA-Semax-Amidate?

NA-Semax-Amidate is the chemically stabilized form of semax, a nootropic peptide from Russian research. Acetyl and amidation extend the duration compared with plain semax. It is used for focus, mental clarity and a neuroprotective effect.

How it works

Semax raises the level of BDNF, a growth factor for nerve cells, and acts via the TrkB system on learning, memory and stress resistance. It additionally influences dopamine and serotonin balance, which explains the focusing effect.

Use (nasal or subcutaneous)

Classically nasal, alternatively subcutaneous.

  • Nasal: a few drops per nostril.
  • Subcutaneous: a small amount with the insulin syringe, use the calculator above.

Dosing

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What the research shows

The mechanism via BDNF and TrkB is described preclinically (Dolotov, 2006). In Russia semax is even used clinically in acute stroke (clinical study, 2001). The data for everyday nootropic use in healthy people is thinner.

Side effects

  • Generally well tolerated, occasionally mild irritation of the nasal mucosa.
  • Rarely headache, inner restlessness if taken too late.

Storage

Before mixing the powder is robust, normal room temperature (around 20 to 25 degrees) is fine, ideally kept in the dark. After mixing, keep in the fridge (2 to 8 degrees), do not freeze. It stays good there for at least 8 to 10 weeks with barely any loss of potency, in practice considerably longer. Swirl or shake to mix, both are fine.

Evidence

Sources

  1. 1 Semax regulates BDNF and TrkB in the hippocampus (mechanism, preclinical). Dolotov et al., Brain Research, 2006
  2. 2 Semax in acute ischemic stroke (clinical study). Zhurnal Nevrologii i Psikhiatrii, 2001

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