As part of a larger crossover , randomized , double-blind study , we examined the subjective and psychomotor responses of 15 healthy volunteers to four experimental conditions : placebo , 350 mg carisoprodol , 10mg oxycodone , and 350 mg carisoprodol followed 60 min later by 10mg oxycodone ( intended to test the interaction of the two drugs when they were producing their maximal effects ) .
