Review Article

Chinese Herbal Medicine and Depression: The Research Evidence

Table 1

Summary of the RCTs included in the Western literature (unique studies shown in bold).

Study Setting and duration Sample
Size
Diagnosis and severity
CHM treatment (no. treated)Control
Treatment (no. treated)
Outcome measuresResults*Adverse events Jadad, DB and ROB*

Li et al. 2006 [30] (English)China (hospital outpatients)
30 days
164Senile depression  
TCM diagnostic criteria
Shugan Jieyu Yin decoction 100 mL twice daily (84)FLU 20 mg twice daily (80)Clinical assessment based on TCM criteriaCure/markedly relieved/improved/failed:
CHM 40% 27% 24% 8% FLU 3% 24% 38% 36%

Significant difference in total effective rate (92% versus 64%; P   <  0.01)
Not reportedJ:1  
DB:12 ROB:
Unclear
Unclear
High
High
Unclear
Unclear

Luo et al. 2006* [31]
(Chinese)
and
Li et al. 2007* [32]
(Chinese)
China
(hospital outpatients)
6 weeks
66Depression
CCMD-3 ICD-10
TCM diagnosis
HAM-D > 20
SAS and SDS > 53
Danzhi Xiaoyao Powder 12 g twice per day plus placebo
(34)
MAP 25 mg per day increasing to max. 250 mg per day plus placebo (32)HAM-D
SDS
SAS
SERS
(As above plus neuro-immuno-endocrine outcomes for Li et al. 2007 [32])
Mean reduction in HAM-D:
CHM: 35.90 to 10.62
MAP: 34.16 to 8.29
(reported as:
CHM: 35.59 to 11.22
MAP: 34.16 to 8.77 in Li et al. 2007 [32])
Significant reduction within both groups ( ), NS difference between groups
CHM: 9 reports
MAP: 91 reports significant difference ( )
J:4
DB:17
ROB:
Low
Low
Low
Low
Unclear
Unclear

Shen et al. 2004 [33]
(Chinese)
China
(6 centres)
6 weeks
60* 
*3 cases lost
Depression
CCMD-3
ICD-10
HAM-D 20+
SDS 50+
Jieyu 60 pills 3 times daily
(28)
MAP 25 mg daily increasing to 100–250 mg (29) HAM-D
SDS
SAS
CGI
ARS
Mean reduction in HAM-D:
CHM 35.93 to 9.71
MAP 38.48 to 8.90
Significant reduction within both groups ( ), NS difference between groups
MAP: range of reported adverse effects
CHM: mild headache, fatigue significant difference ( )
J:2
DB:15
ROB:
Low
Unclear
Unclear
Unclear
Unclear
Unclear

Sun et al. 2009 [34] (Chinese)China  
(multicentre)
6 weeks
120Depression
CCMD-3  
HAM-D 17–28  
TCM diagnostic criteria
Shugan Jieyu capsule twice daily (80)Placebo capsule twice daily (40)HAM-D  
CGI STCM score
Response rates based on HAM-D: CHM 68%, placebo 29% based on STCM: CHM 59%, placebo 23.7%  
Significant difference between groups (P < 0.01)
CHM: 30.4% (24/79)Placebo 23.1% (9/39).
No serious adverse events. NS difference
J:4  
DB:20 ROB:
Low
Unclear
Low
Low
Low
Unclear

Yang et al. 2007 [35]
(Chinese)
China
12 weeks
64Depression
CCMD-3
HAM-D >18
Modified Xiaoyao 9 g pill twice daily plus AMI
25–150 mg per day (32)
FLU 20–40 mg per day (32)HAM-D
Clinical assessment
Mean reduction in HAM-D:
CHM + AMI 29.36 to 4.35
FLU: 30.18 to 4.18
NS difference between groups. Relapse rates lower in CHM + AMI group (3 versus 14 cases)
CHM + AMI: 12 reports
FLU: 12 reports
J:2
DB:14
ROB:
Low
Unclear
Unclear
Unclear
Unclear
Unclear

Yu et al. 2007 [36] (Chinese)China (hospital)
8 weeks
105Depression
CCMD-3  
HAM-D 17+ TCM diagnostic criteria
Modified Xiaoyao decoction plus CLOM 2550 mg per day (53)CLOM 75225 mg per day (52)HAM-D  
CGI-SI  
Clinical assessment
Mean reduction in HAM-D:  
CHM + CLOM: 28.48 to 7.89 CLOM: 28.22 to 7.91
Significant reduction within both groups (P   <  0.01), NS difference between groups
CHM + CLOM:  
9 reports CLOM: 40 reports

Significant difference (P   <  0.01)
J:0  
DB:15 ROB:
High
High
High
High
Unclear
Unclear

Zhang et al. 2006 [37]
(Chinese)
China
(hospital inpatients and outpatients)
6 weeks
90Senile depression
CCMD-3
HAM-D >18
Xiaoyao 8 pills 3 times per day plus FLU 20 mg (30)Sanpu xinnao xin 2 pills 3 times per day FLU 20 mg (31)
FLU 20 mg–40 mg only (29)
HAM-D
TESS
Mean reduction in HAM-D:
XY + FLU: 28.58 to 10.29
SX + FLU: 26.41 to 10.45
FLU: 27.76 to 10.26
NS difference between groups
XY + FLU: 15 reports
SX + FLU:14 reports
FLU: 26 reports
Significant difference ( )
J:2
DB:17
ROB:
Unclear
Unclear
Unclear
Unclear
Unclear
Unclear

Zhang et al. 2007 [38]
(English)
China
(7 sites)
12 weeks
87
(plus 62 bipolar)
Depression
DSM-IV
HAM-D 18+
Free and Easy Wanderer Plus* (Jia Wei Xiao Yao San)
36 g/day in 3 doses
(49)
Placebo tablets
(38)
HAM-D
MADRS
CGI-S
Mean reduction in HAM-D:
CHM: 23.6 to 8.1 Placebo: 24.0 to 13.1
Significant difference between groups ( )
Most frequent: dizziness, headache
NS difference
J:4
DB:23
ROB:
Low
Unclear
Low
Low
Low
Unclear

*Note: HAM-D scores are baseline and final mean scores. ARS: Asberg Rating Scale; CCMD: Chinese Classification of Mental Disorders; CGI-S: Clinical Global Impression-Severity scale; D and B: Downs and Black; HAM-D: Hamilton Rating Scale for depression; J: Jadad; MADRS: Montgomery-Asberg Depression Scale; NS: non-significant; SAS: Self rating Anxiety Scale; SDS: Zung’s Self rating Depression Scale; SERS: Side Effect Rating Scale; STCM: Symptom of traditional Chinese medicine; TCM: traditional Chinese medicine; TESS: Treatment Emergent Symptom Scale. Drugs: AMI: amitriptyline; CLOM: clomipramine; FLU: fluoxetine; MAP: maprotiline. *ROB (Risk of bias) was reported random sequence generation, allocation concealment, blinding of participants and personnel, blinding of outcome assessment, incomplete outcome data, selective reporting.