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Psilocybin, Psilocin, and Magic Mushroom Dosage
by Erowid

Psilocybe cubensis is a medium strength psilocybian mushroom consisting of approximately .63% psilocybin and .60% psilocin in dried wild mushrooms. Indoor cultivated mushrooms tend to have higher concentrations. Note that potency of mushrooms can vary greatly from one batch to the next and from one part of a single mushroom to another part (cap and stem can have different concentrations). Because of these natural variations, chopping or grinding up multiple mushrooms and homogeninizing the material can help reduce the risk of unexpectedly strong (or weak) doses of psilocybin.

The following chart shows approximate oral dosages for common (dried) Psilocybe cubensis in grams. P. cubensis and other psilocybin mushrooms can vary in potency by as much as 10x.

Image by Slee
Oral P. cubensis Dosages
Threshold.25 g1/100 oz
Light.25 - 1 g1/100 - 1/28oz
Common1 - 2.5 g1/28 - 1/10oz
Strong2.5 - 5 g1/10 - 1/6oz
Heavy5 + g1/6oz +

Onset : 10 - 40 minutes (when chewed and held in mouth)
Onset : 20 - 60 minutes (when swallowed on empty stomach)
Duration : 2 - 6 hours
Normal After Effects : up to 8 hours

  • Comparative potency of selected Psilocybe mushrooms, Stamets 1996
  • Extraction and analysis of indole derivatives from fungal biomass, Gartz 1994

    Psychedelics Encyclopedia, by Peter Stafford
    Psilocybin Mushrooms of the World, Paul Stamets

    Every individual reacts differently to every chemical.
    Know your Body - Know your Mind - Know your Substance - Know your Source.

    Erowid's dosage information is a summary of data gathered from users, research, and other
    resources and should not be construed as recommendations. Individuals can respond
    differently to the same dosage. What is safe for one can be deadly for another.

    Start low with new substances.
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