Animals were administered 4-methylpyrazole (200mg/kg, i.p.) or sodium azide (10 mg/kg, i.p.) prior to an acute injection of ethanol or saline and steroids were measured 45 minutes following injections. (A) 3α,5α-THP levels were increased in the rat cerebral cortex after acute ethanol (2 g/kg, i.p.) administration and were not affected by treatment with either inhibitor. (B) Plasma alcohol levels were increased in animals receiving the catalase inhibitor and (C) plasma acetaldehyde concentrations were decreased when catalase was inhibited. *P < 0.05 compared to controls, n=6 in duplicate.