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 psychedelic experience as a systematic progression of seven levels.

For more, see the articles section.

Featured Reports

Recommended firsthand accounts of hallucinogenic experiences
Combination
4-HO-MET
60mg Oral
by Sedric Lightbury
DPH
2000mg Oral
4-HO-MET
30 mg Oral in Gel Cap
Ayahuasca
2g Syrian Rue / 1g Mimosa Hostillis Oral
Ayahuasca
2.5g Syrian Rue / 6g Mimosa hostillis Oral
by nervewing
Memantine
150 mg Oral
by nervewing
MXPr
60mg Intranasal
For more, see the reports section.