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Figure 2: The figure shows the dose response to L-arginine (0.04-3 μg/rat) both in acute (a) and chronic (b) phases when this agent was pre-administered to naloxone (0.1 mg/kg, i.p.) before formalin test. Values are as mean ± SEM. Post hoc analysis show *P<0.05, **P<0.01 compared to control

Figure 2: The figure shows the dose response to L-arginine (0.04-3 μg/rat) both in acute (a) and chronic (b) phases when this agent was pre-administered to naloxone (0.1 mg/kg, i.p.) before formalin test. Values are as mean ± SEM. Post hoc analysis show *<i>P</i><0.05, **<i>P</i><0.01 compared to control