Tall man letters are gaining wide acceptance.

Tall man (uppercase) letters are used within a drug name to highlight its primary dissimilarities and help to differentiate look-alike names.1 Several studies have shown that highlighting sections of words using tall man lettering can make similar drug names easier to distinguish,2 and fewer errors are made when tall man letters are used to differentiate products with look-alike names.3,4 The Institute for Safe Medication Practices (ISMP),5–7 the FDA,8 The Joint Commission,9 and other safety-conscious organizations such as the National Association of Boards of Pharmacy (NABP)10 have promoted the use of tall man letters as one means of reducing confusion between similar drug names. From a survey conducted by the ISMP in 2008, most respondents appeared to agree. Nearly all of those surveyed (87%) felt that the use of tall man letters by the medical product industry helped to reduce errors in drug selection, and two-thirds (64%) reported that tall man lettering actually prevented them from dispensing or administering the wrong medication. A fully alphabetized list of drug names with tall man lettering can be found at www.ismp.org/Tools/tallmanletters.pdf.11 A partial list of drug names that have been approved by the FDA is presented in Table 1. Additional examples are shown in Table 2. TABLE 1 Examples of FDA-Approved Generic Drug Names With Tall Man Letters Table 2 Examples of Additional Drug Names With Tall Man Letters