Abbreviation
Meaning
Abbreviation
Meaning
Abbreviation
100

NPO

nothing by mouth

100

sublingual

SL

100

TID

three times daily

100

milligrams

mg

100

PRN

as needed

200

OTC

over the counter

200

at once

STAT

200
QOD

every other day

200

after meals

PC
200

q2H

every 2 hours

300

PO

by mouth

300

discontinue

D/C

300

tinct, tc

tincture

300

capsule

cap

300

QHS

every night at bedtime

400

BID

twice daily

400

drops

GTT

400

susp

suspension

400

before meals

AC

400

AD

right ear

500

HS

hour of sleep

500

ointment

ung, oint

500

supp

suppository

500

milliliter

mL
500

OU

both eyes

M
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