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Piracetam

Piracetam molecule structurePiracetam molecule structure
Piracetam
Nootropil, Nootropyl, Nootrop, Nootron, Avigilen
Chemical Class

Piracetam is a nootropic substance of the racetam class and a cyclic derivative of the neurotransmitter GABA.citation needed First synthesized in 1964 by Corneliu E. Giurgea at the Belgian pharmaceutical company UCB,1 it became the first nootropic drug to modulate cognitive function without causing sedation or stimulation.citation needed Piracetam is the earliest and least potent racetam, requiring doses approximately 100 times higher than newer derivatives like noopept. It is prescribed in some countries for myoclonus2, has been studied as an adjunctive therapy for epilepsy34, and has been used for dementia and cognitive impairment, with inconclusive results.5

Dosage & Duration

Dosage

Doses are population estimates that vary widely between individuals.

Threshold~0.5 g
Light0.5-2 g
Moderate2-3 g
Strong3-5 g
Heavy5+ g
Bioavailability
~100%

Duration

Onset15-35 minutes
After Effects1-6 hours
Total3-6 hours
Half-life
~5 hours

Subjective Effects

Legacy content. A statistically backed ontology from Mindstate Design Labs is coming soon.

Piracetam is described as a nootropic that influences cognitive function without acting as a sedative or a stimulant, and it was characterized on introduction as the first such compound to modulate cognition without producing either effect. Reported benefits center on memory, learning, and general cognition, particularly in states of cognitive decline. Some users report noticeable effects on the first day at around 800 mg, with the same dose feeling less pronounced on subsequent days. Adverse experiences, when they occur, tend toward anxiety, irritability, restlessness, and headache rather than perceptual change.

Physical

Physical effects are largely absent by design, with neither sedation nor psychostimulation reported as characteristic; occasional reports include somnolence, weakness, weight gain, headache, tremor, and hyperkinesia. Increased libido and hypersexuality are also occasionally reported.

Bodily

Uncomfortable

Cognitive

At typical lower doses the headspace is reported as improved recall, spatial memory, learning capacity, and attention rather than an altered state of consciousness. At higher doses, reports of hypomania or mania become increasingly common, with piracetam having an ability to induce hypomania even in those without bipolar disorders. Changes in visual perception, primarily with colors appearing more saturated, are also reported. Anxiety, irritability, agitation, nervousness, and occasionally depressed mood are reported as adverse effects, though some sources suggest the overall effect on lowering depression and anxiety may exceed the effect on memory.

Emotional

Enhancements

Reagent Testing

Expected colorimetric results for common reagent tests. Colors show reaction change over 1–2 minutes.

Marquis(MQ)
No reaction
No reaction
Mecke(ME)
No reaction
No reaction
Mandelin(MD)
No reaction
No reaction
Ehrlich(EH)
No reaction
No reaction
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Pharmacology

Pharmacodynamics

Piracetam's mechanism of action is not fully understood, though it influences both neuronal and vascular functions without acting as a sedative or stimulant.citation needed The drug is a positive allosteric modulator of the AMPA receptor, although this action is weak and may not fully account for its clinical effects.6 Piracetam is also an inhibitor of N-type calcium channels, with an IC50 of approximately 3 μM in rat neurons, well below the central nervous system concentrations achieved at typical doses.citation needed Rather than binding with high affinity to specific receptors, piracetam appears to modulate neurotransmission by interacting with polar heads in phospholipid membranes, stabilizing membrane fluidity and potentially increasing the density and function of postsynaptic receptors including NMDA receptors. Through this membrane-stabilizing action, piracetam enhances cholinergic neurotransmission via muscarinic acetylcholine receptors and may influence glutamatergic, serotonergic, and noradrenergic systems. GABA brain metabolism and GABA receptors are not affected by piracetam despite its structural similarity to GABA. At the vascular level, piracetam increases erythrocyte deformability, reduces platelet aggregation, diminishes erythrocyte adhesion to vascular endothelium, and reduces capillary vasospasm, collectively improving microcirculation including cerebral blood flow.

Pharmacokinetics

Piracetam is rapidly and extensively absorbed following oral administration, with absolute bioavailability close to 100%.7 Peak plasma concentration is reached within 1 hour in fasted subjects, though food intake may delay this to 1.5 hours and reduce peak concentration by approximately 17%.7 The drug distributes to all tissues except adipose tissue with a volume of distribution of approximately 0.6 L/kg, crosses the blood-brain barrier, and is not bound to plasma proteins.7 Piracetam undergoes negligible metabolism, with approximately 90% of the dose excreted unchanged in the urine.7 Steady state plasma concentrations are achieved within 3 days of dosing.7

Metabolitesnone documented yet

Interactions

Caution

Use caution

These combinations are not usually physically harmful, but may produce undesirable effects, such as physical discomfort or overstimulation. Extreme use may cause physical health issues. Synergistic effects may be unpredictable. Care should be taken when choosing to use this combination.

AbacavirAceclofenacAcemetacinAcetaminophenAcetazolamide
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Tolerance

Tolerance timelines are rules of thumb, not exact schedules, and vary widely between individuals and use patterns.

Full Tolerance
Tolerance to many of the effects of piracetam develops with prolonged and repeated use, resulting in users needing to administer increasingly large doses to achieve the same effects.
Baseline Reset
1-2 weeks
Half Tolerance
3-7 days
Cross Tolerance

Racetam nootropics (aniracetam, pramiracetam, and related compounds)

Harm Potential

Addiction & Dependence

Psychological

Extremely Low

Piracetam can be considered non-addictive with a low potential for abuse. It does not appear to be capable of causing psychological dependence among users.

Physical

Extremely Low

There may be discontinuation symptoms if used for a prolonged period of time; tapering is recommended in these situations.

Toxicity

Hematologic

Piracetam reduces platelet aggregation and fibrinogen concentration, which may increase bleeding risk; this is primarily a concern for individuals prone to cerebral hemorrhage or those taking blood-thinning medications.citation needed

Renal

Patients with renal insufficiency should not use piracetam.citation needed

History & Culture

Discovery and Development

Piracetam was first synthesized sometime between the 1950s and 1964 by Corneliu E. Giurgea and his team at the Belgian pharmaceutical company UCB. There are reports of the compound being investigated for epilepsy treatment during the 1950s. Giurgea was struck by the substance's apparent ability to

Legality

International

Piracetam does not appear in the official INCB schedules of narcotic drugs under the 1961 Convention, psychotropic substances under the 1971 Convention, or precursor chemicals under the 1988 Convention. It is therefore not internationally scheduled under those three UN drug-control conventions.

By Country

Controlled / restricted3
United States flagUnited StatesRestricted
India flagIndiaRestricted
Nigeria flagNigeriaRestricted
Prescription18
Australia flagAustraliaPrescription only
Belgium flagBelgiumPrescription only
China flagChinaPrescription only
Finland flagFinlandPrescription only
France flagFrancePrescription only
Germany flagGermanyPrescription only
Hong Kong flagHong KongPrescription only
Italy flagItalyPrescription only
Netherlands flagNetherlandsPrescription only
New Zealand flagNew ZealandPrescription only
Norway flagNorwayPrescription only
Poland flagPolandPrescription only
Russia flagRussiaPrescription only
Singapore flagSingaporePrescription only
Spain flagSpainPrescription only
Sweden flagSwedenPrescription only
Switzerland flagSwitzerlandPrescription only
United Kingdom flagUnited KingdomPrescription only
Legal / decriminalized1
Colombia flagColombiaLegal (regulated)
Not scheduled4
Brazil flagBrazilNot scheduled
Canada flagCanadaNot approved
Czech Republic flagCzech RepublicNot scheduled
Ukraine flagUkraineNot scheduled

References

Source Pages

  1. DrugBank
  2. DrugBank Article: Piracetam and mitochondrial dysfunction
  3. DrugBank Article: Piracetam anticonvulsant properties
  4. DrugBank Article: Piracetam efficacy
  5. Erowid
  6. Erowid Piracetam Vault: FAQ
  7. Isomer Design (TiHKAL/PiHKAL)
  8. PsychonautWiki
  9. TripSit Factsheets
  10. TripSit Wiki
  11. Wikipedia

Citations

  1. Yan H, Zhou M, Pan Z, Peng Y, Wang J, Li X, Xie Y, Liu Q, Huang C, Wang Q, & Liu G. (2026). Pharmacokinetics and Bioequivalence Evaluation of Piracetam Tablet: A Randomized, Single-Dose, Two-Period, Crossover Study in Healthy Chinese Participants Under Fasting and Fed Conditions. Drugs in R&D. https://doi.org/10.1007/s40268-026-00541-01
  2. Genton P, Guerrini R, & Remy C. (1999). Piracetam in the treatment of cortical myoclonus.. https://pubmed.ncbi.nlm.nih.gov/103381091
  3. Fischer W, Kittner H, Regenthal R, Russo E, & De Sarro G. (2004). Effects of piracetam alone and in combination with antiepileptic drugs in rodent seizure models.. https://pubmed.ncbi.nlm.nih.gov/153383291
  4. Fischer W, Kittner H, Regenthal R, Russo E, & De Sarro G. (2004). Effects of piracetam alone and in combination with antiepileptic drugs in rodent seizure models.. https://www.sciencedirect.com/science/article/abs/pii/S0011393X05804072?via%3Dihub1
  5. Flicker L, & Grimley Evans G. (2001). Piracetam for dementia or cognitive impairment.. https://pubmed.ncbi.nlm.nih.gov/114059711
  6. Ahmed H. Ahmed, & Robert E. Oswald. (March 2010). Piracetam defines a new binding site for allosteric modulators of alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA) receptors. Journal of Medicinal Chemistry, 53(5), 2197–2203. https://doi.org/10.1021/jm901905j1
  7. UCB Pharma. (2013). Nootropil (piracetam) - Data Sheet. UCB Pharma. https://www.e-lactancia.org/media/papers/Piracetam-DS-UCB2013.pdf12345
  8. Nootropil 1200 mg film-coated tablets - Summary of Product Characteristics (SmPC). Electronic Medicines Compendium (emc) (n.d.). https://www.medicines.org.uk/emc/product/101131/smpc123
  9. Alex Haahr Gouliaev, & Alexander Senning. (May 1994). Piracetam and other structurally related nootropics. Brain Research. Brain Research Reviews, 19(2), 180–222. https://doi.org/10.1016/0165-0173(94)90011-61
  10. Therapeutic Goods (Poisons Standard—June 2026) Instrument 2026. legislation.gov.au (n.d.). https://www.legislation.gov.au/F2026L00633/asmade/2026-05-28/text/original/epub/OEBPS/document_1/document_1.html1

Further Reading

  1. ChemSpider: Piracetam

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Recent changes8 human edits · latest

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6 September 2026

  1. Contributor · Updated the article: Update Piracetam

24 January 2026

  1. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

  2. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

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  5. Josie Kins · Updated the article · also 1,4-Butanediol, 1B-LSD, 1cP-AL-LAD and 573 more

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