Corticosterone (CORT) or vehicle was administered via the drinking water for 7 days to mimic high physiological stress. On the final day of CORT treatment, a single dose of diisopropyl fluorophosphate (DFP) or vehicle was administered. Seven days later, rats received a single injection of normal (pH = 7.2) or acidic saline (pH = 4.0) into the left gastrocnemius muscle. Gastrocnemius muscle was collected 5 or 15 days later. (A) IL-1β levels were assayed at day 5, (B) and day 15. (C) IL-6 levels were assayed at day 5, (D) and day 15. *P < 0.05, **P < 0.01, ***P < 0.001. N = 6–8/group. Data are mean ± SD.