Racetams
Piracetam, Aniracetam, Oxiracetam, Nefiracetam, Sunifiram / DM-235 · Nootropic (racetam family)
What it is
The original "nootropic" family — piracetam (1960s, still prescribed in parts of Europe) and its descendants aniracetam, oxiracetam, and nefiracetam. Sunifiram (DM-235) is a related experimental compound derived from this research line, not structurally a racetam. Related entries: Noopept and phenylpiracetam have their own pages.
What human evidence shows
Piracetam has a genuinely large but old and mixed literature: signals in cognitive decline and post-stroke contexts, little convincing evidence in healthy adults. The descendants ride on smaller, mostly animal datasets — aniracetam's anxiolytic reputation, for instance, is primarily rodent work. Sunifiram has essentially no human record.
Risks
Piracetam has a relatively extensive tolerability record; safety data become sparse for the newer members — nefiracetam's development was marked by animal toxicity findings, and sunifiram's potency-without-data profile puts it closer to the long-tail research compounds than to piracetam. No US product standard applies; purity is unverifiable.
Legal status
US: not scheduled, not approved — the FDA has stated piracetam is not a legal dietary supplement ingredient. Prescription drug in parts of Europe.
Evidence base
established literature
Large human evidence base: several phase 3 or 4 trial reports, plus multiple meta-analyses or systematic reviews.
- phase 3/4
- 36
- randomised
- 327
- reviews
- 123
- human trials
- 639
Counts are of published papers, not distinct trials, and measure how much research exists — not whether this works or is safe for you.
Research (12)
- Nefiracetam facilitates hippocampal neurotransmission by a mechanism independent of the piracetam and aniracetam actionBrain Res · 2000
- [Levetiracetam]Neurologia · 2001
- A new antiepileptic drugJ Neurol Neurosurg Psychiatry · 2002
- Efficacy and safety of L-oxiracetam on cognitive function in patients with traumatic brain injury: a multicentre, randomised, double-blind, phase 3 clinical trialSignal Transduct Target Ther · 2025
- Levetiracetam-induced thrombocytopeniaEpilepsia · 2004
- [Oxiracetam]G Clin Med · 1989
- Prolongation of latencies for passive avoidance responses in rats treated with aniracetam or piracetamPharmacol Biochem Behav · 1985
- Pharmacological treatments for vascular dementia: a systematic review and Bayesian network meta-analysisFront Pharmacol · 2024
- Piracetam and piracetam-like drugs: from basic science to novel clinical applications to CNS disordersDrugs · 2010
- Oxiracetam alleviates anti-inflammatory activity and ameliorates cognitive impairment in the early phase of traumatic brain injuryActa Neurochir (Wien) · 2023
- Levetiracetam: treatment in epilepsyExpert Opin Pharmacother · 2003
- Piracetam and other structurally related nootropicsBrain Res Brain Res Rev · 1994
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