Send to

Choose Destination
See comment in PubMed Commons below
Psychopharmacology (Berl). 2000 Oct;152(2):149-56.

Fenfluramine effects on impulsivity in a sample of adults with and without history of conduct disorder.

Author information

Department of Psychiatry and Behavioral Sciences, University of Texas-Houston Health Science Center 77030-3497, USA.



The role of serotonin in impulsivity was examined by administering the serotonin-releasing drug, d,l-fenfluramine, and measuring effects on impulsive responding of male subjects with and without a history of conduct disorder (CD) under controlled laboratory conditions.


Five adult male subjects with a history of CD and five matched controls were recruited into a study to determine the acute effects of d,l-fenfluramine on a laboratory measure of impulsive behavior. This laboratory measure, based upon delay of gratification, presented subjects with choices between a small reward after a short delay and a larger reward after a longer delay. Impulsive behavior was indicated by frequent choices for the smaller reward.


Acute oral doses of d,l-fenfluramine (0.21, 0.42, and 0.85 mg/kg) produced decreases in the number of impulsive choices in all subjects with a history of CD, but had no effect on the control subjects.


This data suggests that a deficit in serotonin and/or dopamine may play a role in impulsivity in CD subjects, and drugs which act to reduce this biological deficit can reduce impulsiveness.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Loading ...
    Support Center