Plasma ADMA levels and MDA concentration in the gastric mucosa of intact rats, and those pretreated with vehicle (saline), l-arginine (200 mg/kg i.g.), CGRP (10 μg/kg s.c.), capsaicin (CAP) (applied in small protective dose (0.25 mg/kg i.g.)) or superoxide dismutase (SOD, 5000 U/rat i.p.) and exposed to 3.5 h of ischemia/reperfusion. Results are mean ± S.E.M of 7 rats per group. Significant change (p < 0.05) as compared with the intact group, is indicated by an asterisk. A cross indicates significant change (p < 0.05) as compared with vehicle-pretreated rats exposed to 3.5 h of I/R.