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.

read more
About Us

Thank you Emergence Benefactors!

Emergence Benefactors logo
Thank you to our wonderful sponsor, Emergence Benefactors

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 dissociative experience as a systematic progression of six levels.

For more, see the articles section.

Featured Reports

Recommended firsthand accounts of hallucinogenic experiences
4-HO-MET
100mg Oral
by Cocoanatta
Combination
by Kaylee
Combination
by Kaylee
DMT
50mg Smoked
4-HO-MET
60mg Oral
by nervewing
MXE
50mg Intranasal
2C-E
25mg Oral
Combination
For more, see the reports section.