Table 1.

Comparison between analgesic effect of equal doses of nZnO and cZnO in the same times. Student t -test was used to comparison between equal doses at the equal times.

Groups	Time
cZnO(mg/kg) vs nZnO (mg/kg)	0	30	60	90
1vs 1	NS	** P < 0.01	NS	NS
5 vs 5	NS	NS	* P < 0.05	**P < 0.01
10 vs 10	NS	*P < 0.05	NS	NS
20 vs 20	NS	NS	NS	NS