Table 4.

Protective efeect of Pinus roxburghii Sarg. on tail withdrawal reflex induced by tail immersion.

Groups	Drug (dose), route	Reaction time (min) Mean ± SEM
		30 min	60 min	90 min	120 min
Control	Tween 80 (5%), p.o	1.0 ± 0.1	1.4 ± 0.2	1.5 ± 0.2	2.8 ± 0.2
Standard	Diclofenac sodium (50 mg/kg), p.o	5.8 ± 0.2**	8.2 ± 0.2**	8.4 ± 0.2**	8.8 ± 0.2**
AB	100 mg/kg, p.o	1.4 ± 0.2	2.4 ± 0.3	2.8 ± 0.2	3.4 ± 0.2
AB	300 mg/kg, p.o	1.8 ± 0.2	3.2 ± 0.2*	4.4 ± 0.4*	6.2 ± 1.5*
AB	500 mg/kg, p.o	2.8 ± 0.4**	3.2 ± 0.4*	4.6 ± 0.2*	5.4 ± 1.9

n = 5. Results are expressed as mean ± SEM. *P > 0.05, **P < 0.01 as compared to control, AB = alcoholic bark extract.