This week's abbreviation is the opposite of last week's abbreviation.
PO
This abbreviation literally means Per Os, which stands for by mouth. This abbreviation can also mean orally. Although it is not common to see it written out, the place where you most likely see this in in the vital signs chart. When temperature is taken and recorded, to save space many charts use PO to indicate that the temperature was taken orally. In this way it's really just a space saver, and about the only place I have regularly seen it mean orally.
Unlike NPO, this is more commonly seen in notes, but it can also be an order. As an order it is usually used with medication to indicate the way the medication should be administered.
Examples:
She took all of her medicines PO without any difficulty.
Amoxicillin 500mg PO daily
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