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Since 2008, ISMP has maintained a list of drug name pairs and trios with recommended, bolded tall man (uppercase) letters to help draw attention to the dissimilarities in look
In addition, the
Tall man (uppercase) letters are used within a drug name to highlight its primary dissimilarities and help to differentiate look-alike names
Tallman lettering (or Tall Man lettering) is the practice of writing part of a drug's name in upper case letters to help distinguish sound-alike, look-alike drugs from
Scope of using tall man letters