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newest 2025spec sheet10 rows
NMDA (N-methyl-D-aspartic acid) is a synthetic amino-acid derivative that selectively activates one subtype of the brain's glutamate receptor; that receptor is named the NMDA receptor precisely because this molecule turns it on and nothing much else does. It is a laboratory and pharmacology research tool used to probe glutamate signaling, not a supplement or a nootropic to be taken. In animals and tissue it excites neurons and, at high exposure, can be excitotoxic (damaging through over-excitation).
- Defines and names the NMDA receptor
- Selective pharmacology tool
- Model for studying plasticity
Mechanism
is a selective at the NMDA-type ionotropic receptor, mimicking the action of the natural transmitter glutamate at that receptor while ignoring the and kainate glutamate receptors. Full opening of the channel also requires a co-agonist (glycine or D-serine) at a separate site and relief of a voltage-dependent magnesium block, after which the channel passes calcium and sodium to drive excitation and plasticity. Because calcium influx through this receptor can trigger cell-damage pathways, strong or prolonged NMDA activation is a classic experimental model of excitotoxic injury and seizures.
receptor fingerprint
selective agonist
Glycine co- siterequires co-agonist to open
Safetyrisks and cautions, not medical advice
This is a research chemical, not something meant for human self-experimentation; strong NMDA-receptor activation can provoke seizures and excitotoxic neuronal damage. In practice it is handled in laboratory settings, and combining glutamatergic agonists with anything that lowers seizure threshold or with other excitatory drugs is hazardous. Not medical advice.
Subjective profileweighing the evidence above
Not a supplement and not a nootropic, whatever a vendor page implies. It is the agonist that gave the receptor its name and a pharmacology tool, and strong activation of that receptor causes seizures and excitotoxic damage. Nobody should be taking it.
Resources
This entry is here for reference.
Research
- 2009first citedThe history of the pharmacology and cloning of ionotropic glutamate receptors and the developme…
- 2025most recentGlutamate Excitotoxicity: A Key Secondary Injury Mechanism of Traumatic Brain Injury and Spinal…
- 1.Allosteric antagonist action at triheteromeric NMDA receptors
- 2.Glutamate Excitotoxicity: A Key Secondary Injury Mechanism of Traumatic Brain Injury and Spinal Cord Injury
- 3.The history of the pharmacology and cloning of ionotropic glutamate receptors and the development of idiosyncratic nomenclature
3 listed here; entry last updated July 2026
Reviews
My notesprivate to this device
FAQ
Is NMDA a nootropic I can take?
No; it is a selective glutamate-receptor agonist used as a research tool, and strong activation of that receptor can cause seizures and excitotoxic damage.
Why is the receptor named after it?
The receptor is called the NMDA receptor because this molecule selectively activates it and helped pharmacologists distinguish it from other glutamate receptors.
What does the magnesium block mean?
At rest, magnesium plugs the channel until the cell is depolarized, which is why the receptor acts as a coincidence detector for learning. This is not medical advice.
Limitations of the evidence
- Not for human consumption
Notes and cautions
- Seizures
- Excitotoxic neuronal damage