Table 2.

Effects of the methanolic extract the bark of Lawsonia inermis on acetic acid-induced writhing in mice

Groups	Dose (mg/kg)	No. of writhing	% inhibition
Group I	Vehicle	30.5(±1.136)
Group II	10	7.75(±1.306)*	74.59
Group III	300	8.75 (±1.489)*	71.31
Group IV	500	5.25(±1.581)*	82.79

Values are mean±SEM, (n = 4);

^*p<0.05 as compared with vehicle control (one way ANOVA followed by Dunnet’s test). Group I animals received vehicle (1% Tween 80 in water), Group II (Standard) received diclofenac sodium 10 mg/kg body weight, Group III and IV were treated with 300 and 500 mg/kg body weight (p.o.) of the methanolic extract of Lawsonia inermis barks, respectively.