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Safety
Frequency
q.d.
Once daily
High risk
Risk
Can be mistaken for "q.i.d." (four times daily)
Safer Alternative
Write "daily"
Example
q.d. misread as q.i.d.
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