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for educational and safety purposes
Pramiracetam and Phenylpiracetam both come up in the same conversations; they overlap on Acetylcholine. Pramiracetam: Pramiracetam is a laboratory-made compound in the piracetam ("racetam") family, developed by Parke-Davis as CI-879 and later sold in a few European countries as a prescription memory drug under the brand name Pramistar. Phenylpiracetam: Phenylpiracetam (phenotropil, carphedon) is a phenylated derivative of piracetam, developed in Russia and used clinically as a nootropic, with reported effects on focus, physical endurance, and tolerance to cold and fatigue.
Pramiracetam is a laboratory-made compound in the piracetam ("racetam") family, developed by Parke-Davis as CI-879 and later sold in a few European countries as a prescription memory drug under the brand name Pramistar. It is meant to improve memory and attention; in animals it reliably increases the rate at which brain cells take up choline, a building block of the memory-related signalling chemical acetylcholine, but no receptor that it binds to has ever been identified. Human evidence is thin: a small placebo-controlled trial in men with head injuries reported better delayed recall, and a study in healthy volunteers found it partly blunted drug-induced forgetting, while a trial in Alzheimer's disease found no benefit even at high doses. The entire published literature is roughly 40 papers, most of them small, decades old, or done in rodents, so confident claims that it strongly enhances cognition in healthy people are not supported by what has actually been measured.
Phenylpiracetam (phenotropil, carphedon) is a phenylated derivative of piracetam, developed in Russia and used clinically as a nootropic, with reported effects on focus, physical endurance, and tolerance to cold and fatigue. The added phenyl group makes it considerably more potent than the parent racetam and confers a distinct mechanism, selective inhibition of the dopamine transporter, which is thought to underlie its stimulant-like, motivating properties. It was among the first cognitive enhancers prohibited in competitive sport, having been banned by anti-doping authorities in 1998.
both fingerprints on one instrument; where the marks line up the two compounds work the same lever, where a slot goes dark only one of them touches it. read straight from each entry's affinity table; nothing here is invented.
enhances
Permissive requirement, not a direct target; memory effect is abolished without intact steroid signalling
raises
Normalises scopolamine-induced changes in choline permeability; increases cerebral blood flow
No measurable affinity
Increases enzyme activity without changing NOS mRNA
Inhibitor
Increases choline uptake; bell-shaped dose-response
Antiaggregant, reported as mediated mainly via inhibition of thromboxane A2 metabolism
modulates
agonist
inhibits (R-enantiomer)
enhances
mostly lost vs piracetam
strengths are the entries' qualitative ratings (strong / moderate / weak); Ki and EC50 figures appear where an entry records them.
easiest to source: Phenylpiracetam is currently listed by more trusted vendors (3), so it's the simpler one to get hold of. for effects and safety, read each full entry; this is educational, not medical advice.