Fig. 2. Interleukin-1β content (pg/ml) at 15 h in the spinal cord (  A ) and dorsal root ganglia (  B ) after right paw carrageenan injection. Bupi = bupivacaine; carr = carrageenan; contra = contralateral; ipsi = ipsilateral; TTX = tetrodotoxin. *P < 0.05.