A quality or attribute that allows a substance to act on the mind.

Articles on that refer to Psychotropic

Millennium 3000 Scenarios By Theodore J. Gordon and Jerome C. Glenn
Another Formula for Intelligence: The Neural Net Paradigm By Ray Kurzweil
The 10% Solution For A Healthy Life, Chapter 8: The Mind-Body Connection By Ray Kurzweil
Chapter 4: Kurzweilís Impoverished Spirituality By William A. Dembski
From The Enlightenment to N-Lightenment By Michael Buerger

Related Links

Overview of Psychotropic Medications
Psychotropic Drugs and Synapses
Psychotropic Medications