Group

Dose (mg/kg p.o.)

X1st PHASE (n˚) ± S.D.

X2nd PHASE (s) ± S.D.

Inhibition (%)

1st phase

2nd phase

Control

-

23.29 ± 1.20

325.75 ± 35.29

-

-

Morphine

10a

12.75 ± 2.87**

12.50 ± 5.45***

45.26

96.16

Indomethacin

20

18.64 ± 2.87*

48.94 ± 5.45***

19.96

84.98

Aqueous extract

190

20.76 ± 3.08

201.43 ± 7.89*

10.86

38.16

380

19.35 ± 4.87

186.76 ± 2.23**

16.92

42.67

570

18.64 ± 2.09

85.50 ± 2.93***

19.97

73.75

Methanol extract

100

19.75 ± 8.63

284.00 ± 23.80

15.20

12.82

200

18.62 ± 2.22

142.67 ± 3.12**

20.05

56.20

Hexane fraction

100

22.54 ± 4.30

293.07 ± 13.67

3.22

10.03

200

21.45 ± 5.38

291.63 ± 9.54

7.90

10.47

Dichloromethane fraction

100

20.48 ± 7.39

288.10 ± 3.82

12.07

11.56

200

20.40 ± 2.05

287.89 ± 8.67

12.41

11.62

Ethyl acetate fraction

100

19.75 ± 8.63

273.04 ± 23.80

15.20

16.18

200

18.54 ± 2.73

153.07 ± 15.12**

20.40

53.01

n-butanol fraction

100

20.64 ± 5.20

278.80 ± 4.68

11.38

14.41

200

19.84 ± 4.32

260.79 ± 6.74

14.81

19.94