Table 2 Effects of control, T. avellanedae aqueous extract (AE, 100, 200, and 400 mg/Kg), indomethacin (10 mg/Kg), and morphine (2.5 mg/Kg) at the writhes induced by acetic acid 0.6%. The number of writhes median is shown in the third column, followed by inhibition percentages.