Oxiracetam

non-nutrient/non-botanical

What is it

Oxiracetam is a synthetic nootropic compound in the racetam family, structurally similar to piracetam with an added hydroxyl group. It was developed in the late 1970s and is used as a prescription cognitive-enhancing drug in some European countries, but is not approved as a medication or supplement ingredient in the United States.

How it works

Like other racetams, oxiracetam acts as a positive allosteric modulator of AMPA glutamate receptors, enhancing excitatory neurotransmission involved in learning and memory. It also modulates cholinergic activity and may increase release of acetylcholine in specific brain regions. Some users describe oxiracetam as more 'stimulating' than aniracetam or piracetam, with effects on focus and verbal fluency. Oxiracetam is water-soluble, well absorbed orally, with a half-life of 8-10 hours. Most clinical evidence comes from European studies in elderly patients with cognitive impairment; data in healthy adults are limited.

Evidence for 3 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Cognitive impairment in elderly / dementia

Grade C

Moderate evidence

European clinical trials have reported modest cognitive improvements in elderly patients with mild cognitive impairment. Effect sizes are small and not all trials have shown benefit.

Stroke recovery

Grade C

Moderate evidence

Some studies have used oxiracetam adjunctively for cognitive recovery after stroke. Evidence is modest.

Memory and focus in healthy adults

Grade F

Limited evidence

Controlled trials of oxiracetam for cognitive enhancement in healthy adults are essentially absent. Effects on focus, verbal fluency, and memory in healthy users are mostly self-reported.

2 commercial forms

Oxiracetam powder

Water-soluble; well absorbed

Allows precise dosing; has a mildly bitter taste.

Oxiracetam capsules

Same absorption profile

Pre-measured for convenience.

Dosage

Studies have used 800-2400 mg per day, typically divided into two doses. Supplement labels often suggest 600-800 mg per serving, twice daily. There is no formal recommended intake.

When and how to take it

Most users take oxiracetam in two doses, morning and early afternoon. Because of its stimulating effects, avoid evening doses. Can be taken with or without food. Co-supplementing choline (alpha-GPC or CDP-choline) is widely reported to reduce headache risk.

Safety

Generally well tolerated in clinical studies. Possible side effects include headache, nausea, restlessness, insomnia, and mild gastrointestinal upset. Long-term safety data outside of European clinical use are limited. Quality of commercial supplement-grade material can be inconsistent.

Who should be cautious

Avoid in pregnancy and breastfeeding. People with kidney impairment require dose adjustment as oxiracetam is excreted renally. People with seizure disorders, psychiatric conditions, or on psychiatric medications should consult a clinician. In the US, oxiracetam is not recognized as a legal supplement ingredient.

Interactions

Oxiracetam may interact with cholinergic medications (acetylcholinesterase inhibitors), other racetams, CNS stimulants, and psychiatric medications. Concurrent use of choline supplements is common to reduce headaches.

Frequently asked questions

Is oxiracetam legal?⌄

It is a prescription medication in some European countries. In the US, oxiracetam is not approved as a drug or recognized as a dietary supplement ingredient, though it is sold online.

How is oxiracetam different from piracetam?⌄

Oxiracetam is reportedly more stimulating and may have stronger effects on focus and verbal fluency, while piracetam is generally considered more memory-focused. Both share the AMPA modulation mechanism.

Do I need to take choline with oxiracetam?⌄

Many users report that co-supplementing choline (alpha-GPC, CDP-choline) reduces racetam-related headaches and may enhance effects.

Does oxiracetam cause insomnia?⌄

It can. Because of its mildly stimulating effects, taking it earlier in the day is recommended to avoid sleep disruption.

Is oxiracetam safe long-term?⌄

Long-term safety data are limited outside European clinical use. Periodic breaks and clinician oversight are reasonable for extended use.

References

  • Oxiracetam (Wikidata) — Wikidata link
  • Oxiracetam (PubChem CID 4626) — PubChem link
  • Oxiracetam (ChEBI 134788) — ChEBI link

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.