[The scope of forensic psychiatry: ethical responsibilities and conflicts of values]

To write about ethics in specialties that straddle the lines of multiple systems cannot be done without discussing values and decisional rules that underlie each one of those systems. By virtue of its multiple associations, forensic psychiatry is an archetype of such specialties ; it works within a set of values that might be viewed as antithetical, even irreconcilable, with other aspects of psychiatry. The extensive scope of action of forensic psychiatry compels its practitioners to hold alternate world views and to apply decisional rules that may clash with the classical values and ethical considerations of medicine (Weisstub, 1980). In this article, following an historical précis, the authors review the scope of action of forensic psychiatry as the basis for the definition of this subspecialty. The concepts, themes and controversies pertaining to the ethical practice of this specialty will be reflected upon in the light of issues encountered in actual practice.