The incidence of nicardipine failure ( 5 % , 95 % confidence interval [ CI ] 0.1 % -24.9 % ) was significantly less than that of esmolol ( 55 % , 95 % CI 31.5 % -76.9 % ) as a sole drug in controlling SBP after brain tumor resection ( difference 99 % CI 13.8 % -75.7 % , P = 0.0012 ) .