a

before

aa

affected area

a.c.

before meals

ad

up to

a.d.

right ear

ad lib

freely

a.m.

morning

a.s.

left ear

ATC

around the clock

a.u.

each ear

b.i.d.

twice a day

BP

blood pressure

c or 

with

cap

capsule

d

day

D.C.

Discontinue

Disp

dispense

div

divide

DS

double strength

EC

enteric coated

elix

elixer

fl

fluid

g, gm

gram

gr

grain

gtt, gtts

drop, drops

h

hour

HA

headache

HCTZ

hydrochlorothiazide

h.s.

bedtime

IM

intramuscular

INH

isoniazid

inj.

injection

IU

international units

IV

intravenous

IVP

intravenous push

IVPB

intravenous piggyback

mcg

microgram

mEq

miliequivalent

mg

miligram

MI

myocardial infarction

ml

mililiter

MOM

milk of magnesia

mOsm

miliosmoles

may repeat

MRX

may repeate x times

n

nostril

N&V

nausea and vomiting

NG

nasogastric 

noct. 

night

N.R.

no refills

NPO

nothing by mouth

NTG

nitroglycerin

NVD

nausea, vomiting, diarrhea

OC

oral contraceptive

OD

overdose

o.d.

right eye

oint. 

ointment

o.s.

left eye

OTC

over the counter

o.u.

both eyes

oz

ounce

p

by

Pb

phenobarbital

p.c.

after meals

PCN

penicillin

p.m.

afternoon or evening

p.o.

by mouth

 post

after

PPI

patient package insert

pr

rectally

p.r.n.

as needed

pv

vaginally

q

every

q.d.

every day, daily

q.h.

every hour

q.i.d.

four times a day

q.o.d.

every other day

q.s.

a sufficient quantity

r

rectal

s or s (bar)

without

Sig.

write on label

SL

sublingual

SS

saturated solution

ss or ss (bar)

one-half

stat

immediately

subc or subq or s.c.

subcutaneously

supp.

suppository

susp.

suspension

syr.

syrup

SZ

seizure

tab

tablet

tbsp

tablespoonful

TCA

Tricyclic antidepressant

TCN

tetracycline

t.i.d.

three times a day

t.i.w.

three times a week

TMP/ SMX

Trimethoprim/ sulfamethoxazole

top

topically

tsp.

teaspoonful 

U

units

u.d. or ut dict

as directed

ung.

ointment

w/o

without

X

times

y.o.

year old

ZnO

Zinc Oxide

T (dot)

one

TT (two dots)

two