Effect Index, which is currently under construction, is a resource dedicated to establishing the field of formalised subjective effect documentation. It is the home of the Subjective Effect Index (SEI), which contains 233 effect descriptions that exist to serve as a comprehensive map of all potential experiences that can occur under the influence of any class of psychoactive compound, particularly hallucinogens.

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Substance Summaries

Hallucinogenic substance classes, broken down and described
For more, see the Substance Index.

Featured Article

Analyses that go beyond individual subjective effects

Inspired by the Shulgin Rating Scale, this article attempts to model the overall DMT experience as a systematic progression of stages and levels.

For more, see the articles section.

Featured Reports

Recommended firsthand accounts of hallucinogenic experiences
4-HO-MET
100mg Oral
Combination
by Kaylee
DMT
50mg Smoked
by Kaylee
Combination
Ayahuasca
2.5g Syrian Rue / 6g Mimosa hostillis Oral
by nervewing
MXE
50mg Intranasal
by Cocoanatta
Combination
by Sedric Lightbury
DPH
2000mg Oral
For more, see the reports section.