1. Experimental psychiatry, i.e., the comprehensive study of experimentally produced psychosis, is important for the advancement of psychiatry.2. The diethylamide of d-lysergic acid (LSD) has proven an excellent tool for investigation of experimentally produced psychotic-like manifestations.3. Clinical, psychological, physiological, and biochemical evidence is offered which indicates that the adrenalin System is involved in the LSD-produced emotional and psychotic phenomena.4. Theoretical reflections concerning the enzymatic adrenalin system as the basis of the development of schizophrenia and other psychoses are reported.Abstract Teaser