OD
Once daily
What OD stands for
OD is a medical abbreviation for once daily. TermDecode files it under frequency abbreviations, and it is one of 2 recorded meanings for the same letters.
OD also stands for
The same letters carry more than one meaning. Which one applies depends entirely on the context it is written in.
Risk
ISMP lists OD/o.d. as error-prone when intended as once daily: it may be mistaken as right eye, leading to oral liquid medications administered in the eye.
Safer Alternative
Write "daily"
Seen in context
OD intended as once daily misread as right eye
Source Note
OD also has a separate eye-laterality entry for right eye; write "right eye" for laterality and "daily" for frequency.
Sources
The risk description and safer alternative above are reproduced from these published lists.
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