Obsessive-- Compulsives complaints have shown good and sometimes marked improvements, since behaviour therapists have established principles of treatment for those psychological problems, i.e.: exposure to evoked stimuli and response prevention of rituals or avoidance behaviours. Pharmacological and behavioral treatments may be associated with success. It seems that the purpose of future research and investigation will be to focalise on the respective place and role of psychotropic drugs (antidepressive and BZD) in association with cognitive behaviour modifications.