Table 3 The top ten most commonly used two-herb combinations of Chinese herbal medicine (CHM) for premenstrual syndrome (N = 13,820)

JWXYS

with

Cyperus rotundus L.

1,059

7.7

JWXYS

with

Leonurus heterophyllus Sweet

818

5.9

Cyperus rotundus L.

with

Leonurus heterophyllus Sweet

773

5.6

JWXYS

with

Corydalis yanhusuo W. T. Wang

564

4.1

Cyperus rotundus L.

with

Corydalis yanhusuo W. T. Wang

512

3.7

JWXYS

with

Salvia miltiorrhiza Bge.

467

3.4

Cyperus rotundus L.

with

Salvia miltiorrhiza Bge.

377

2.7

JWXYS

with

Gui-Zhi-Fu-Ling-Wan

375

2.7

JWXYS

with

Scutellaria baicalensis Georgi

262

1.9

JWXYS

with

Curcuma longa L. or Curcuma aromatica Salisb.

251

1.8