Top Definition
PRN
Medical shorthand terminology for whenever necessary (pro re nata)which basically means its an excuse for the staff to be driven crazy prn.
"what the patient in 1408 really needs is a bath prn..god!"

"what smart jerk wrote the order for a hand job prn???"
מאת DaynaS 17 בפברואר, 2008
2 more definitions
cyberspace euphemism for pornography

intended to foil automated site-blocking software
he spends most of his nights surfing pr()n
מאת BvO 22 באפריל, 2003
PRN
As seen in medical jargon... PRN abbreviates the Latin "Pro Re Nata" which translates to "as matters stand."
Nurses have told me more than once, it means "Patient Report Need" which would seem to be technically incorrect, but is much closer to the functional meaning. (1st Example)

When seen in a prescription, it means "as needed"... the same as "patient reports need" but with no further requirement to report to or consult with the doctor." (2nd Example)
"As Patient reports no further pain or weakness at left knee, no additional followup is scheduled. Patient was instructed to return to the clinic PRN."

"Take two tablets three times a day PRN for pain."
מאת AppleJohn 2 במרץ, 2015

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