A Spironolactone administration decreased alcohol self-administration in nondependent and alcohol-dependent male rats tested under a fixed-ratio 1 schedule of reinforcement. ****p < 0.0001, vs. vehicle. ####p < 0.0001, vs. NON. Nondependent: n = 12; Dependent: n = 12. B Alcohol-induced ataxia was higher in nondependent than dependent male rats; spironolactone did not affect alcohol-induced ataxia in either group. **p < 0.01, difference between dependent and nondependent male rats. Nondependent: n = 15; Dependent: n = 9. C Spironolactone had no effect on blood alcohol levels 30, 60, 120, and 180 min after systemic administration of alcohol (1.5 g/kg) in male rats. Nondependent: n = 15; dependent: n = 9. D Spironolactone administration decreased alcohol self-administration in nondependent and alcohol-dependent female rats tested under a fixed-ratio 1 schedule of reinforcement. *p < 0.05, ****p < 0.0001, vs. vehicle. ####p < 0.0001, vs. NON. Nondependent: n = 7; Dependent: n = 8.