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 articles section.

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
LSD
4 tabs Oral
4-HO-MET
30 mg Oral in Gel Cap
Ayahuasca
2.5g Syrian Rue / 6g Mimosa hostillis Oral
by Cocoanatta
Combination
Ayahuasca
2.5g Syrian Rue / 6g Mimosa hostilis rootbark Oral
Salvia divinorum
2 bowls of 20x extract Smoked
3-HO-PCP
10 mg Intranasal
by nervewing
MXE
50mg Intranasal
For more, see the reports section.