Stacking guide
What goes well with Phenylpiracetam?
Evidence-graded stacking partners for Phenylpiracetam. Synergistic and neutral combinations are listed alongside pairings to avoid. Use this to design a deliberate stack rather than experimenting blind.
Safe to stack with Phenylpiracetam (1)
- Alpha-GPCEVIDENCEA
The most bioavailable common choline source. About 40% of an oral dose reaches the brain within an hour, where it serves as substrate for acetylcholine synthesis and as a phospholipid membrane component. The de facto pairing for every racetam stack.
Standard pairing.
Combine with caution (1)
- CaffeineEVIDENCEA
The most widely consumed psychoactive substance in human history — roughly 80% of the global population uses it daily, mostly via coffee and tea. A competitive adenosine receptor antagonist that lifts the brake on dopamine and norepinephrine signalling. The canonical pairing is 100 mg caffeine + 200 mg L-theanine for clean focus without the jitter.
Easy to overshoot. Lower caffeine to 50-100mg if combining.
Avoid stacking (1)
- ModafinilEVIDENCEA
A eugeroic — a wakefulness-promoting compound — originally developed for narcolepsy. The most-studied prescription cognitive enhancer outside of ADHD treatment. Produces 12–15 hour windows of sustained alertness without the euphoria, abuse potential, or cardiovascular load of amphetamines. Prescription-only in nearly every jurisdiction.
Two strong dopaminergic stimulants — high overstimulation and cardiovascular risk.
Build a stack: use the Stack Builder with Phenylpiracetam pre-selected, or check any specific pairing in the Interaction Checker.
Stacking guidance reflects curated interaction rules from the published literature, traditional use, and well-characterised mechanisms. Individual response varies; introduce one substance at a time and track effects. Not medical advice — see our disclaimer.