Common Pharmacy Abbreviations

a (line above a)

before

a.c.

before meals

ad lib

as desired

a.m.

before noon

amt.

amount

aq

water

B (circle around B)

bilateral

C

Celsius
centigrade

c (line above c)

with

d.

day

F

Farenheit

h.

hour

h.s.

hour of sleep

i

one

ii

two

iii

three

OD

right eye

ss

one-half

OS

left eye

OU

both eyes

P (line above P)

after

p.c. (line above p)

after meals

per

by or through

p.m.

after noon

p.o.

by mouth

p.r.

by rectum

p.r.n.

as needed

q.

each or every

q.s.

quantity sufficint

Rx

prescription

sig.

label
instructions

stat

immediately

t.i.d.

three times a day

s (line above s)

without

wk

week

yr

year

x (line above x)

times or for

>

greater than

<

less than