Safety
Dosage

u

Unit

High risk

Risk

Lowercase "u" can be mistaken for "0" (zero), "4" (four), or "cc"

Safer Alternative

Write "unit"

Example

6u regular insulin misread as 60 units

Sources

https://online.ecri.org/hubfs/ISMP/Resources/ISMP_ErrorProneAbbreviation_List.pdf
https://www.jointcommission.org/en-us/knowledge-library/support-center/standards-interpretation/standards-faqs/000001457