Safety
Route

sub q

Subcutaneous

High risk

Risk

ISMP lists sub q as error-prone: the q may be mistaken as "every".

Safer Alternative

Write "SUBQ" or "subcutaneous"

Example

sub q misread as an every-frequency instruction

Sources

https://online.ecri.org/hubfs/ISMP/Resources/ISMP_ErrorProneAbbreviation_List.pdf