Piracetam and Citicoline (CDP-Choline)
Each entry’s own grades, side by side. A grade says how strong the evidence is for one outcome — it does not rank one entry over the other.
Compound or practice
Piracetam
The original 'nootropic' — decent evidence in cognitive impairment, thin data in healthy people, and unapproved as a supplement in many places.
Grade C2 graded outcomesrevised Jul 10, 2026
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
Compound or practice
Citicoline (CDP-Choline)
A choline source with modest attention and memory data — the more evidence-backed of the popular cholinergics.
Grade C1 graded outcomerevised Jul 10, 2026
A structured monograph in Prometheus's bundled library. Its grades are the monograph's own reading of the evidence, not a peer-reviewed review.
Graded in both
Outcomes are matched by name. Two entries can describe the same outcome in different words, so one listed further down may still be graded in the other.
No outcome has the same name in both entries. They may still overlap under different wording — read the two lists below.
Graded only in Piracetam
- Cognition (impairment/elderly) Small effectEvidence grade C
- Cognition (healthy young) Trivial effectEvidence grade D
Graded only in Citicoline (CDP-Choline)
- Attention / memory Small effectEvidence grade C
What each entry says about the other
- Piracetam’s entry · Works together: Choline sources reduce racetam headaches and may aid effect.
- Piracetam’s entry · Goes with: Choline sources reduce racetam headaches and may aid effect.
Both columns are read from the entries as they stand in this library. A comparison is not advice to take either one, and it is no substitute for a clinician who knows the person.