Effect Index

Effect Index is a highly informative website about the effect of psychedelics, which includes videos and audio next to written descriptions.

Effect Index

“Effect Index serves as the platform for the Subjective Effect Index (SEI), a resource containing formalised documentation of the vast number of distinct subjective states which may occur under the influence of hallucinogens. We strive to comprehensively document and describe the wide variety of potential hallucinogenic experiences. “