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.