| Erowid Psychoactive Vaults: Information on entheogens, psychedelics, and hallucinogens including traditional, spiritual, and responsible use, chemistry, effects, experiences, images, research, legislation, media coverage, bibliographies and links. |
| Ask Dr. Shulgin: Information about psychedelics, entheogens, empathogens (MDMA, Ecstasy), from a pharmacologist and chemist. |
| Cluster Busters: Information regarding the use of hallucinogenic substances for the treatment of cluster headaches and other vascular headaches. |
| HPPD: Hallucinogen Persisting Perception Disorder: Information, treatment, and forums for sufferers of HPPD (Hallucinogen Persisting Perception Disorder), also known as flashbacks, which happens to some users of psychedelic drugs. |
| HPPDonline.com: Information and message boards for people with Hallucinogen Persisting Perception Disorder (flashbacks). |
| Original Kleptonian Neo-American Church: Includes text of "A Narrative of the Early Years of American Psychedelianism" and offers the book for sale. |
| Psychedelicjones.com: One man's experiences with, and thoughts about, psychedelic substances. |
| Serendipity: Psychedelics: Articles on psychedelic mushrooms and DMT (with field notes on DMT experiences); LSD and Ketamine trip reports; preservation of dried psilocybin mushrooms; links to other documents concerning psychedelics. |
| Status of Ololiuhqui in Mexico: |
| The Albert Hoffman Foundation: Homepage of the Albert Hoffman Foundation. Albert Hoffman is the inventor of LSD. |
| The Psychedelic Library: Menu of articles, research papers, books, and essays on LSD, peyote, psilocybin, and the use of psychedelic drugs in research, therapy, religion and personal growth. |
| Trip Magazine: A mainstream publication for about psychedelics. |
| Tryptamind: Resource on psychoactive, psychedelic and hallucinogenic plants and the pharmacological effects of their active chemical constituents. |
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