NA
Not assessed
Na
Sodium
NAS
No added salt
Neg
Negative
NG
Nasogastric
NKA
No known allergies
NKDA
No known drug allergies
NPO
Nothing by mouth
NS
Normal saline
NSAID
Non-steroidal anti-inflammatory drugs
N&V
N/V
Nausea and committing
NVD
Nausea, vomiting, and diarrhea
NWBR
No weight bearing right
NWBL
No weight bearing left
O2
Oxygen
OA
Osteoarthritis
OD
Overdose
O.D
Right eye
OOB
Out of bed
O.S
Left eye
OSA
Obstructive sleep apnea
Oz
Ounce
O.U
Both eyes
N/A
Not applicable