aa.
of each
a.c.
before meals
ad
up to; to make
a.d.
right ear
a.s.
left ear
a.u.
both ears
ad. lib.
as needed or when needed
a.m.
morning
Aq. Purif.
purified water
b.I.d.
twice a day
caps.
capsules
disp.
dispense
div.
divide
d.t.d.
dispense (give) such doses
et
and
g
gram
gal
gallon
gr.
grain
gtt.(s)
drop(s)
h.
hour
h.s.
at bedtime
kg
kilogram
lb
avoirdupois pound
lb.
apothecary pound
Lot.
lotion
M. ft.
mix and make
M
minim
mEq
milliequivalents
mg
milligram
MW
molecular weight
M.W.Q
minimum weighable quantity
N.F.
National Formulary
NPO
nothing by mouth
o.d.
right eye
o.s.
left eye
o.u.
both eyes
oz
avoirdupois ounce
p.c.
after meals
q.I.d.
four times a day
PO
by mouth
pm
afternoon, evening
p.r.n. or prn
as needed, when required
pt
pint
q.
every
q.d.
every day
q.s.
a sufficient quantity
q.s. ad
quantity sufficient added to make
qt
quart
S.A. or s.a.
secundem artem (according to the art of pharmacy)
si opus sit
when necessary, when needed, if there is a need
Sig.
write on label
sp. gr.
specific gravity
SR
sensitivity requirement
susp.
suspension
tab. trit.
tablet triturates
tbsp.
tablespoon (15 mL)
t.I.d.
three times a day
tsp.
teaspoon (5 mL)
U.S.P
United States Pharmacopeia
ut dict
as directed