Side effects and watch-outs
- Headache
- Irritability
- Insomnia (if taken late)
- Stimulant effects
- Rapid tolerance development
- Mild peripheral vasoconstriction (cold hands/feet)
Supplement / Racetam/Nootropic
Phenylpiracetam
Phenyl-substituted piracetam with stimulant properties. Improves cognitive function, psychomotor speed, learning, and physical performance. Banned by WADA for athletic competition. Tolerance develops rapidly — use maximum 2–3x per week.
Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.