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A randomized, blinded, controlled study, designed to see whether labeling the drug as a dose or a ratio affected accuracy or speed in giving the drug, divided 28 doctors into two groups to handle a simulated severe allergic reaction.
The study found that all but two of the doctors in the group that used adrenaline in ampules with ratio labels gave more adrenaline (i.e. overdosed) and took longer to do so than the doctors in the group using ampules with dose labels-American College of Physicians