Leo Hollister

Leo E. Hollister (December 3, 1920 - December 19, 2000) was an American professor emeritus of medicine, psychiatry and pharmacology.

Work on hallucinogens L. E. Hollister's criteria for establishing that a drug is hallucinogenic are as follows: in proportion to other effects, changes in thought, perception, and mood should predominate; intellectual or memory impairment should be minimal; stupor, narcosis, or excessive stimulation should not be an integral effect; autonomic nervous system side effects should be minimal; and addictive craving should be absent.