ID
Intradermal
IM
Intramuscular
IV
Intravenous
IVPB
Intravenous piggy back
PO
By mouth
SC
Subcutaneous
SL
Sublingual
PRN
As needed
OTC
Over the counter
Stat
Immediately
NG
Nasogastric tube
TPN
Total parenteral nutrition
Q 1H
Every hour
Q2H
Every 2 hours
Q3H
Every 3 hours
Q4H
Every 4 hours
QHS
Before bedtime
QOD
Every other day
ATC
Around the clock
Bid
Twice a day
OD
Once dally
QID
4 times a day
TID
3 times a day
AC
Before meals