Risperidone maintenance treatment in schizophrenia: a randomized, controlled trial.
OBJECTIVE
Prevention of relapse is the crucial task in the maintenance treatment of schizophrenia. The investigators in this study sought to determine the duration of maintenance treatment needed with the initial therapeutic dose, in contrast to a reduced dose.


METHODS
In a multicenter open-label, randomized, controlled study, patients with schizophrenia who were clinically stabilized following an acute episode were randomly assigned to a no-dose-reduction group (initial optimal therapeutic dose continued throughout the study), a 4-week group (initial optimal therapeutic dose continued for 4 weeks, followed by a 50% dose reduction that was maintained until the end of the study), or a 26-week group (initial optimal therapeutic dose continued for 26 weeks, followed by a 50% dose reduction until the end of the study). All patients continued until the last recruited patient completed the 1-year follow-up.


RESULTS
Of the 404 patients who met the entry criteria and were randomly assigned, 374 completed the study. The estimated mean time from entry to relapse was 571 days in the 4-week group, 615 days in the 26-week group, and 683 days in the no-dose-reduction group, with estimated relapse rates of 30.5%, 19.5%, and 9.4%, respectively. Patients in the no-dose-reduction group experienced greater reduction in the severity of psychotic symptoms.


CONCLUSIONS
Patients who continued to receive the full risperidone dose used for their acute episode had fewer relapses than those who had dose reductions after 4 weeks or 26 weeks during the maintenance period. There was negligible difference in side effects among the three groups.
Beijing Anding Hospital, Capital Medical University, China. wang_cy@ccmu.edu.cn <wang_cy@ccmu.edu.cn>
Chuan-Yue
CY
Wang
Yu-Tao
YT
Xiang
Zhuo-Ji
ZJ
Cai
Yong-Zhen
YZ
Weng
Qi-Jing
QJ
Bo
Jing-Ping
JP
Zhao
Tie-Qiao
TQ
Liu
Gao-Hua
GH
Wang
Shi-Min
SM
Weng
Hong-Yan
HY
Zhang
Da-Fang
DF
Chen
Wai-Kwong
WK
Tang
Gabor S
GS
Ungvari
D000293:Adolescent; D000328:Adult; D000368:Aged; D014150:Antipsychotic Agents / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012153:Retention, Psychology; D018967:Risperidone / Q000627:therapeutic use*; D012559:Schizophrenia / Q000188:drug therapy*; D055502:Secondary Prevention; D013997:Time Factors; D016896:Treatment Outcome; D055815:Young Adult
D014150:Antipsychotic Agents; D018967:Risperidone