NIDDM
non-insulin dependent diabetes mellitus
NKA
no known allergies
NKDA
no known drug allergies
nl
normal
NPO
nil per os, nothing per mouth
NRB
non-rebreather mask
NSAID
non-steroidal anti-inflammatory drub
NSR
normal sinus rhythm
NSTEMI
non-ST elevation myocardial infarction
NTG
nitroglycerin
NslashV
nausea and vomiting
NVD
nausea, vomiting, diarrhea
O&P
ova and parasites
O2
oxygen
O2Sat
oxygen saturation