PPAP

guinea pig

Also seen as: Phenylpropylaminopentane

The Dose Guy’s verdict

Sep 1, 2026
2 sources

PPAP has a genuine mechanism and zero human data behind it. No trials, no PK, no safety work. It amplifies dopamine and norepinephrine release without touching monoamine oxidase, which is interesting enough to have sustained decades of animal research. None of that research ever reached a person. If you run it, you are the experiment.

Would I take it?No human data. Zero.

What it is

A selegiline analog that enhances catecholaminergic neuronal activity without inhibiting monoamine oxidase. Developed by József Knoll, the pharmacologist who also developed selegiline itself. The mechanism is specific: PPAP strengthens the coupling between a neuron’s action potential and its transmitter release, so each firing event releases more dopamine and norepinephrine. It does not force release or inhibit breakdown, though rat experiments did show it inhibits noradrenaline and dopamine uptake. BPAP, its more potent successor from the same lab, carries a similar profile at lower doses. Both are research chemicals with zero clinical development. If the Knoll lineage interests you, selegiline itself is an approved drug with decades of human data and the obvious place to start.

What the research shows

No human trials. Zero. Everything below is animal or in-vitro work. Read it as “interesting,” not “evidence it works in you.”

The published literature is all animal and isolated-tissue work:

PPAP at 0.1 mg/kg significantly increased dopamine release from rat striatum, substantia nigra and tuberculum olfactorium and norepinephrine release from locus coeruleus versus saline.Life Sci 2003 · rat transmitter release

PPAP’s catecholaminergic activity enhancer effect was unrelated to monoamine oxidase inhibition in rat experiments.Life Sci 1996 · rat mechanism study

No human clinical trial, pharmacokinetic study, or safety study of PPAP exists in the indexed literature.as of Aug 2026

Realistic protocols

I am not building a protocol from animal data with zero human pharmacology behind it. Forum lore runs low single-digit milligram doses orally. For context, the rat studies saw increased motility at 2 mg/kg and dopamine release at 0.1 mg/kg, but nobody knows what PPAP does in a person, how it absorbs, or how long it lasts. If you run it anyway, start at the lowest dose you can measure, keep the run short, and log everything. This is self-experiment in the purest sense.

Side effects

Nobody has measured a side effect of PPAP in a human:

anecdotalMild stimulation and mood lift at low doses, reported in sparse forum logs.

unknownZero human safety data. A compound that amplifies catecholamine release has obvious cardiovascular and abuse potential that has never been characterized in a person.

Where to buy

No live listings from tracked vendors right now.