aversion therapy

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A type of behavior therapy designed to modify undesirable or antisocial habits or addictions by creating a strong association with a disagreeable or painful stimulus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun any technique of behavior modification that uses unpleasant stimuli in a controlled fashion to alter behavior in a therapeutic way; primarily used for alcoholism or drug abuse (but with little success)