WTS was associated with increased odds of sedatives/tranquilizer use ( OR = 3.22 , 95 % CI : 1.25 , 8.25 ) , pain reliever use ( OR = 4.31 , 95 % CI : 2.02 , 9.17 ) , and sleeping medication use ( OR = 8.31 , 95 % CI : 2.37 , 29.20 ) , controlling for sex , age , school type , and other substance use .