Table 2 Adverse events in included studies

RenY2014

I: 5/24

C: 0/24

Acupuncture point bleeding

–

XueLZ2018

I:2/47

C:6/47

1 patient had nausea, 1 patient had dizziness

3 patients had nausea, 1 patient had vomiting, 2 patients had dizziness

LiuXH2013

I: 4/62

C: 12/62

2 patients had dizziness, 1 patient had vomiting, 1 patient had nausea

3 patients had dizziness, 6 patients had nausea, 3 patients had vomiting

LiCH2017

I: 6/50

C: 1/50

1 patients had dizziness

3 patients had nausea、1 patient had vomiting、2 patients had dizziness

ZhangZZ2018

I: 0/50

C: 5/50

–

1 patient had constipation,2 had mild gastrointestinal discomfort, 2 had spasmodic myalgia

YanZL2018

I: 3/50

C: 11/50

1 patient had nausea, 2 patients had dizziness

3 patients had nausea, 4 patients had vomiting, 4 patients had dizziness

ZhangCY2018

I: 2/50

C: 6/50

2 patients had dizziness

1 patients had nausea, 2 patients had vomiting, 3 patients had dizziness

PangHM2020

I: 3/30

C: 5/50

2 patient had vomiting, 1 patient had dizziness

3 patient had vomiting. 2 patient had dizziness