Contingency management for the treatment of methamphetamine use disorders.
OBJECTIVE
Theory and some preliminary evidence suggest that contingency management may be an effective treatment strategy or adjunct to psychosocial treatment for methamphetamine use disorders. An experimentally rigorous investigation on the topic was provided by a large multisite trial conducted under the auspices of the Clinical Trials Network of the National Institute on Drug Abuse.


METHODS
The authors report data on 113 participants who were diagnosed with methamphetamine abuse or dependence. They were randomly assigned to receive 12 weeks of either treatment as usual or treatment as usual plus contingency management. Urine samples were tested for illicit drugs, and breath samples were tested for alcohol. The reinforcers for drug-negative samples were plastic chips, some of which could be exchanged for prizes. The number of plastic chips drawn increased with each week of negative samples but was reset to one after a missed or positive sample.


RESULTS
The participants in both groups remained in treatment for equivalent times, but those receiving contingency management in addition to usual treatment submitted significantly more negative samples, and they were abstinent for a longer period of time (5 versus 3 weeks).


CONCLUSIONS
These results suggest that contingency management has promise as a component in treatment strategies for methamphetamine use disorder.
Roll
John M
JM
David Geffen School of Medicine, UCLA, USA. johnroll@wsu.edu
Petry
Nancy M
NM
Stitzer
Maxine L
ML
Brecht
Mary L
ML
Peirce
Jessica M
JM
McCann
Michael J
MJ
Blaine
Jack
J
MacDonald
Marilyn
M
DiMaria
Joan
J
Lucero
Leroy
L
Kellogg
Scott
S
D000328:Adult; D019969:Amphetamine-Related Disorders / Q000523:psychology / Q000628:therapy* / Q000652:urine; D001521:Behavior Therapy / Q000379:methods*; D016739:Behavior, Addictive / Q000523:psychology / Q000628:therapy / Q000652:urine; D005260:Female; D006801:Humans; D008297:Male; D012055:Reinforcement Schedule; D015813:Substance Abuse Detection; D016320:Substance Abuse Treatment Centers; D014040:Token Economy; D016896:Treatment Outcome