Table 1. Evaluation of analgesic activity by acetic acid induced writhing method.

Sr. No.	Treatment	Dose mg/kg	Writhing episodes in 15 min (Mean ± S.E.M.)	Percent protection
1	Control	--	38.70±0.5547	-
2	Ibuprofen	10	13.19±0.6921**	66
3	IIIa	50	17.28±0.6647**	55
4	IIIb	50	18.24±0.6425**	53
5	IIIc	50	24.89±0.5354**	36
6	IIId	50	15.65±0.7845**	60
7	IIIe	50	26.45±0.8121**	32
8	IIIf	50	16.46±0.5744**	57
9	IIIg	50	27.65±0.5478**	29
10	IIIh	50	18.57±0.4545**	52
11	IIIi	50	16.49±0.6545**	57
12	IIIj	50	16.47±0.2254**	57
13	IVa	50	16.45±0.5456**	57
14	IVb	50	17.49±0.5641**	55
15	IVc	50	21.73±0.5974**	44
16	IVd	50	15.44±0.6133**	60
17	IVe	50	22.45±0.5525**	42
18	IVf	50	15.36±0.6455**	60
19	IVg	50	19.65±0.7322**	49
20	IVh	50	17.22±0.4855**	56
21	IVi	50	19.47±0.6513**	50
22	IVj	50	14.24±0.4745**	63
23	IV3a	100	15.44±0.4454**	60
24	IV3b	100	22.65±0.5546**	42
25	IV3c	100	19.47±0.5941**	50
26	IV3d	100	21.77±0.4423**	44
27	IV3e	100	25.49±0.4473**	34
28	IV3f	100	19.42±0.6651**	50
29	IV3g	100	26.56±0.4329**	31
30	IV3h	100	28.56±0.7325**	26
31	IV3i	100	23.58±0.6423**	39
32	IV3j	100	19.26±0.4523**	50
33	Ih	25	20.54±0.6425**	47
34	Ii	25	22.89±0.5214**	41
35	Ij	25	18.34±0.4527**	53
36	IIh	25	20.57±0.8592**	47
37	IIi	25	22.44±0.6854**	42
38	IIj	25	15.47±0.8957**	60
** P < 0.01 represent significant difference when compared with control groups.