a.c., AC
before meals
ad lib
as desired
b.i.d., BID
two times a day
cap
capsule
elix.
elixer
ext
extract
IM
intramuscular
IV
intravenous
nightly
every night at bedtime
NS (N/S)
normal saline
OD
right eye
OS
left eye
OU
both eyes
p.c., PC
after meals
per
by
PO
by mouth
orally
by mouth
p.r.n., PRN
when necessary or required
soln.
solution
stat.
at once/immediately
subcut.
subcutaneous
supp.
suppository
susp.
suspension
syp.
syrup