Comparison
Piracetam vs Phenylpiracetam
Piracetam
The original nootropic, developed in 1964 by Romanian chemist Corneliu Giurgea. A cyclic derivative of GABA and the founding member of the racetam family.
Phenylpiracetam
A phenylated derivative of piracetam 20-60x more potent. Originally developed for Soviet cosmonauts.
| Field | Piracetam | Phenylpiracetam |
|---|---|---|
| Category | racetam | racetam |
| Dose range | 1200–4800mg | 100–300mg |
| Half-life | 5h | 4h |
| Onset | 45min | 30min |
| Evidence | EVIDENCEA | EVIDENCEB |
| Safety | ●●●●● | ●●●●○ |
| Legal (US) | USUnscheduled | USUnscheduled |
| PubMed refs | 1200 | 80 |
The comparison in plain English
Piracetam is the original racetam, mild, gentle, well-tolerated. Phenylpiracetam is the same molecule with a phenyl group attached, which adds significant dopaminergic stimulation and 20–60x the potency by weight. Originally developed for Soviet cosmonauts.
Bottom line
Phenylpiracetam is functionally a different drug, a stimulating cognitive enhancer with rapid tolerance development and athletic-doping implications. Piracetam is a daily nootropic foundation.
Choose Piracetam if
You want a daily, non-stimulating cognitive support. Safe profile, no tolerance issues at moderate doses.
Choose Phenylpiracetam if
You need acute focus and stamina for a specific event or sprint. Cycle aggressively (3 on / 4 off). Banned by WADA for athletic competition.