eighteen normal-sleeping young ( mean age 25.6 years ) volunteers received either ethanol ( 0.75 g/kg producing blood ethanol concentrations of 71.1 +/- 24.3 mg/100 ml on average ) or caffeine ( 4.0 mg/kg dissolved in 300 ml of 97 % caffeine-free instant coffee ) at 0920-0950 h after spending 5 , 8 , or 11 h time in bed ( tib ) the previous night .
C0001962
ethanol
C0684262
blood ethanol concentrations