Roidipedia.Compound reference & reporting
06 AUG 2026
CompoundsResearch chemical Nebracetam
Research chemicalNootropicRacetamMuscarinic agonist

Nebracetam

Also known as WEB-1881-FU

An obscure racetam with cholinergic and reported muscarinic-agonist activity, studied preclinically for ischaemia and cognitive deficits. Essentially uncharacterised in humans and rarely available.

01 Overview

Nebracetam (WEB-1881-FU) is a pyrrolidinone that stands out among racetams for reported direct M1 muscarinic agonist activity in addition to enhancing cholinergic function. It was investigated in animal models of cerebral ischaemia and cognitive impairment.

There is almost no published human efficacy or safety data. It appears only sporadically on research-chemical markets, and any use is exploratory.

02 Mechanism

Reported to act as an M1 muscarinic acetylcholine receptor agonist and to enhance central cholinergic transmission; also affects protein kinase C signalling in preclinical work.

03 Dosing

TierDoseRouteNotes
Exploratory10–100 mg/dayOralNo established human dosing; ranges are speculative.

04 Effects

EffectMagnitudeEvidence
Cholinergic enhancementShown in animal models only.Preclinical
Neuroprotection in ischaemia modelsReported in rodent ischaemia studies; no human confirmation.Preclinical

05 Side effects

EffectSeverityFrequencyEvidenceCountermeasures
Cholinergic overactivationMuscarinic agonism can theoretically cause nausea, salivation, cramping.ModerateUnknownPreclinical
Unknown long-term effectsNo human safety database exists.ModerateUnknownUnconfirmed

07 References

Nebracetam (WEB-1881-FU) pharmacologyPreclinical pharmacology literature

08 Discussion0 comments

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This page is reference information, not medical advice. Doses and protocols are documented as they appear in the clinical literature and in practice — describing them is not a recommendation to use them. Countermeasures listed here are not a substitute for a physician. Legal status varies by jurisdiction and changes.