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Effect Index

Effect Index, 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 Effects

A selection of subjective effects that best represent the SEI

For more, see the Subjective Effect Index.

Featured Article

Analyses that go beyond individual subjective effects

DMT

Saturday, May 8 2021 · 23 min read

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 Replications

Artistic representations of specific subjective effects

Shifting pebbles

A replication of Colour shifting

by Symmetric Vision

For more, see the replications gallery.

Featured Reports

Recommended firsthand accounts of hallucinogenic experiences

Truth

by Kaytwo

DMT

50mg Smoked

4-HO-MET

60mg Oral

Wintry Void

by nervewing

Memantine

150 mg Oral

Wracked with Color

by nervewing

4-HO-MET

30 mg Oral in Gel Cap

LSD

4 tabs Oral

Salvia divinorum

2 bowls of 20x extract Smoked

3-HO-PCP

10 mg Intranasal

DiPT

70 mg oral

For more, see the reports section.