by Craig Olson
This author has spent years studying this problem, reading books, journal articles, and articles on the Internet, particulary articles from the National Library of Medicine. There is an enormous number of drugs of abuse, and the list is getting longer every year. One of the reasons for this is that there are scientists like Alexander Shulgin who are creating new drugs all the time. Shulgin has been like Dr. Frankenstein, creating monsters in the name of medical research. Nevertheless Shulgin has made valuable contributions in his book, PIHKAL. This unusual acronym refers to phenylethylamines. Pheneylethylamines is a huge class of hallucinogenic substances, although not all phenylethylamines are hallucinogenic. Dopamine is even a valuable substance. For information on DMPEA, a notorious but controversial phenylethylamine, click on this link to another page in this website.

Mescaline
Mescaline is an old drug which comes from the peyote cactus. This drug has been studied by many scientists for many years. In 1940 Stockings noted that it produced symptoms similar to those seen in schizophrenia. This view was later endorsed by Osmond, Smythies, and Harely-Mason in 1952 and shortly afterwards by Hoffer. link to more info