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Substance Guides

Each psychedelic substance has a distinct pharmacological profile, phenomenological character, cultural history, and risk profile. Choose a substance to explore.

How Long Does Each Psychedelic Last?

Total duration of primary effects by route of administration. The time axis is square-root scaled so twenty-minute and two-day journeys stay comparable — each substance page has the full phase-by-phase timeline.

Harm reduction education only.

Contents

    This site provides harm reduction education only. Psychedelics are controlled substances in most jurisdictions.
    Nothing here constitutes medical or legal advice. In crisis, see our crisis resources or contact a healthcare provider immediately.