Route
per os
By mouth
What per os stands for
per os is a medical abbreviation for by mouth - written out in full as “Per os (by mouth)”. TermDecode files it under route abbreviations.
RouteFlagged high riskSourced
Risk
Can be mistaken for "OS" (left eye)
Safer Alternative
Write "PO", "by mouth", or "orally"
Seen in context
per os misread as left eye
Sources
The risk description and safer alternative above are reproduced from these published lists.
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