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NA-Semax Amidate

Research Use Only
peptideIntranasal

A souped-up version of Semax with chemical modifications that make it more potent and easier for your body to absorb. Gives a stronger boost to brain growth and repair signals (BDNF) with longer-lasting cognitive benefits.

What to Expect

1

Week 1–2

Enhanced version of Semax — faster onset of cognitive enhancement. Improved focus, motivation, and verbal fluency. Mild mood elevation.

2

Week 3–6

Sustained nootropic effects stronger than standard Semax. Better memory and learning. Enhanced neuroplasticity via BDNF upregulation.

3

Week 8+

Peak cognitive benefits. Neuroprotective effects accumulating. Benefits may plateau — cycling recommended.

Common Side Effects

Nasal irritationHeadacheOverstimulationIrritability at high dosesHair shedding (rare, reversible)
Tolerance: Mild after 6-8 weeks
Cycling: 4-8 weeks on, 2-4 weeks off.

Dosing

100-400 mcg as a nasal spray, once or twice daily. It's more potent than regular Semax, so you need less.

Practical Guide

Reconstitution

Use pre-made nasal spray. No reconstitution needed for standard nasal formulation.

Storage

Refrigerate after opening. Use within 15-20 days. Protect from light.

Timing

Morning or early afternoon for cognitive enhancement. More potent than standard Semax — start with lower number of sprays.

Food

No food interactions.

Benefit Profile

🧠 Brain & Cognition
10/10
😌 Mood & Anxiety
6/10
🩹 Injury Healing
3/10

Pricing

VendorVariantPrice
Limitless BiotechNasal 5mg$54.99
Code: PSTACK10Buy
Skye PeptidesNasal 5mg$49.99BEST

Published Research

20 studies indexed(2006–2026)1 clinical trial2 reviews

[The efficacy of semax in the tretament of patients at different stages of ischemic stroke].

Gusev EI, Martynov MY, et al.·Zh Nevrol Psikhiatr Im S S Korsakova·2018
Clinical Trial

Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions.

Rahman OF, Lee SJ, Seeds WA·J Am Acad Orthop Surg Glob Res Rev·2026
Review

[Comparison of anticoagulant effects of regulatory proline-containing oligopeptides. Specificity of glyprolines, semax, and selank and potential of their practical application].

Liapina LA, Pastorova VE, et al.·Izv Akad Nauk Ser Biol·2006
Review

Semax peptide targets the μ opioid receptor gene Oprm1 to promote deubiquitination and functional recovery after spinal cord injury in female mice.

Liu R, Chen Y, et al.·Br J Pharmacol·2025
Research Article

Semax, a Copper Chelator Peptide, Decreases the Cu(II)-Catalyzed ROS Production and Cytotoxicity of aβ by Metal Ion Stripping and Redox Silencing.

Tomasello MF, Di Rosa MC, et al.·Bioinorg Chem Appl·2025
Research Article

The Effect of Peptide Semax, an ACTH(4-10) Analogue, on Intracellular Calcium Dynamics in Rat Brain Neurons.

Kolbaev SN, Sharonova IN, Skrebitsky VG·Bull Exp Biol Med·2025
Research Article

Antidepressant-like and antistress effects of the ACTH(4-10) synthetic analogs Semax and Melanotan II on male rats in a model of chronic unpredictable stress.

Inozemtseva LS, Yatsenko KA, et al.·Eur J Pharmacol·2024
Research Article

Semax, a Synthetic Regulatory Peptide, Affects Copper-Induced Abeta Aggregation and Amyloid Formation in Artificial Membrane Models.

Sciacca MFM, Naletova I, et al.·ACS Chem Neurosci·2022
Research Article

Semax, synthetic ACTH(4-10) analogue, attenuates behavioural and neurochemical alterations following early-life fluvoxamine exposure in white rats.

Glazova NY, Manchenko DM, et al.·Neuropeptides·2021
Research Article

Brain Protein Expression Profile Confirms the Protective Effect of the ACTH((4-7))PGP Peptide (Semax) in a Rat Model of Cerebral Ischemia-Reperfusion.

Sudarkina OY, Filippenkov IB, et al.·Int J Mol Sci·2021
Research Article
Showing 10 of 20 studies. Search PubMed for the complete list.

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