Group

Treatment

X. americana

P. capensis

Normal control

0.9% w/v Normal saline

0.22±0.006^d

0.22±0.006^d

Negative control

0.9% w/v Normal saline

0.43±0.017^a

0.43±0.017^a

Positive control

Propranolol (10 mg Kg^-1 bw^-1)

0.25±0.007^cd

0.25±0.007^cd

ExpG A

Extract (150 mg Kg^-1 bw^-1)

0.34±0.014^b

0.32±0.015^b

ExpG B

Extract (200 mg Kg^-1 bw^-1)

0.30±0.003^bc

0.29±0.013^bc

ExpG C

Extract (250 mg Kg^-1 bw^-1)  

0.27±0.018^cd

0.26±0.004^cd