D&S 1
after
pc
after meals
u.d.
as directed
ac
before meals
po
by mouth; orally
q : Q
every
qd ; QD
every day
BID
2 times a day
TID
3 times a day
prn ; PRN
as needed
aa
of equal parts
MR
may repeat
AD
right ear
OD
right eye
qs
quantity sufficient
Ad Lib
as desired
DS
double strength
hs ; HS
at bedtime
OS
left eye
qod ; QOD
every other day
AU
both ears
OU
both eyes
QID
4 times a day
DAW
Dispense as Written
AS
left ear