Medical Abbreviations on Pharmacy Prescriptions Abbreviation 1/2NS 5-ASA
Meaning / Intended Meaning one-half normal saline (0.45%) 5-aminosalicylic acid
a A.M. aa AAA
before morning of each abdominal aortic aneurysm (called a "triple-A")
AAA
apply to affected area
ac achs AD
before meals before meals and at bedtime right ear
ad lib ad sat. ad.
freely; as much as desired to saturation to; up to
ALT alt. alt. h. am, A.M.
alanine aminotransferase alternate every other hour in the morning; before noon ampule amount anterior before before dinner acetaminophen
amp amt. ant. ante ap APAP aPTT AQ, aq a.s., AS
activated partial thromboplastin water left ear
ASA
aspirin
Notes About Confusion
Better to spell out drug name; can be misinterpreted as five tablets of aspirin per FDA
Can be misinterpreted as 'apply to affected area' Can be misinterpreted as 'abdominal aortic aneurysm'
Category drug or class name drug or class name
time time measurement medical condition route of administration time time
Caution not to confuse with AD (meaning right ear)
route of administration time other measurement
lab time time time
Better to spell out drug name "acetaminophen"
Better to spell out drug name "aspirin"
dosage form measurement other time time drug or class name lab other route of administration drug or class name
Medical Abbreviations on Pharmacy Prescriptions AST ATC AU
aspartate aminotransferase around the clock each ear; both ears
AZT
zidovudine
Ba
barium
BCP
birth control pills
Bi
bismuth
bid, BID BM BMI bol BP BPH
twice a day bowel movement body mass index bolus blood pressure benign prostatic hypertrophy blood sugar body surface area bedtime
BS BSA BT
c C.C. c/o C&S CABG CaCO3
with chief complaint complaints of culture and sensitivity coronary artery bypass graft calcium carbonate
CAD
coronary artery disease
CAP
cancer of the prostate
cap.
capsule
CBC cc
complete blood count cubic centimeter
CD
controlled delivery
CF
cystic fibrosis
Better to spell drug name out; can be misinterpreted as azathioprine per FDA
In U.S., 'hs' or 'HS' is more commonly used for bedtime
lab time route of administration drug or class name
drug or class name drug or class name drug or class name time other vitals measurement vitals medical condition lab vitals time
other other other lab other
Do not confuse with "capsule" Do not confuse with "cancer of the prostate" Can also mean "with food"
drug or class name medical condition medical condition dosage form lab measurement drug release technology medical condition
Medical Abbreviations on Pharmacy Prescriptions cm CNS conc CPZ
centimeter central nervous system concentrated Compazine
CR
controlled-release
cr, crm CV CXR D/C, dc, disc.
cream cardiovascular chest x-ray discontinue OR discharge
D5/0.9 NaCl
D5W
5% dextrose and normal saline solution (0.9% NaCl) 5% dextrose and half normal saline solution (0.45% NaCl) dextrose 5% in normal saline (0.9%) 5% dextrose in water
DAW DBP dil. disp div DKA
dispense as written diastolic blood pressure diluted dispense divide diabetic ketoacidosis
dL DM
deciliter diabetes mellitus
DO
Doctor of Osteopathic Medicine date of birth diphtheria-pertussistetanus
D5 1/2/NS
D5NS
DOB DPT
DR
delayed-release
DVT
deep vein thrombosis
Better to spell drug name out; can be misinterpreted as chlorpromazine per FDA
Multiple possible meanings; spell out instead of using "D/C"
measurement other other drug or class name
drug release technology dosage form other lab other
drug or class name drug or class name
Better to spell out vaccine name; can be misinterpreted as Demerol-PhenerganThorazine per FDA
drug or class name drug or class name other lab other other other medical condition measurement medical condition medical specialty other drug or class name
drug release technology medical condition
Medical Abbreviations on Pharmacy Prescriptions DW
dextrose in water, diabetes mellitus or distilled water
EC
enteric-coated
EENT
Eye, Ear, Nose, and Throat
elix. emuls. ER
elixir emulsion extended-release
ER
emergency room
ETOH
ethyl alcohol
F f or F FBS FDA Fe
Fahrenheit female fasting blood sugar Food and Drug Administration Iron
FFP
fresh frozen plasma
fl or fld ft G, or g, or gm garg
fluid foot gram gargle
GERD GI gr.
gastroesophageal reflux disease gastrointestinal grain
GTT
glucose tolerance test
gtt, gtts
drop, drops
GU guttat. h, or hr. h/o
genitourinary drop by drop hour history of
Multiple possible meanings; spell out instead of using "DW"
Can also mean "emergency room" Can also mean "extended-release"
other
drug release technology Medical Specialty dosage form dosage form drug release technology other drug or class name lab other lab other
"g" is preferred symbol
Apothecary measurement (obsolete and may be misinterpreted as gram; do not use) Can be confused with gtt for drops Can be confused with GTT for glucose tolerance test
drug or class name or lab drug or class name measurement measurement measurement route of administration medical condition other measurement
lab measurement
other measurement time other
Medical Abbreviations on Pharmacy Prescriptions H&H
HCT, or Hct HCT
hematocrit and hemoglobin histamine 2 water highly active antiretroviral therapy hematocrit hydrocortisone
HCTZ
hydrochlorothiazide
HR HS
heart rate half-strength
hs or HS
at bedtime, hours of sleep
HTN
hypertension
hx IBW ID
history ideal body weight intradermal OR infectious disease
IJ
injection
IM
intramuscular
IN
intranasal
inf
infusion
inj.
injection
instill.
instillation
IP
intraperitoneal
IR
immediate-release
H2 H2 0 HAART
lab
Better to spell out drug name; can be misinterpreted as hydrochlorothiazide per FDA Better to spell out drug name; can be misinterpreted as hydrocortisone per FDA better to spell out; do not mistake for "bedtime" Do not misinterpret as 'half-strength'
Multiple possible meanings; spell out word instead of using "ID" better to spell out 'injection'
other other drug or class name lab drug or class name
drug or class name
vitals measurement
time medical condition other lab route of administration; other route of administration route of administration route of administration route of administration route of administration route of administration route of administration drug release technology
Medical Abbreviations on Pharmacy Prescriptions IU
international unit
IUD IV
intrauterine device intravenous
IVP
intravenous push
IVPB
intravenous piggyback
J K
joule potassium
KOH
potassium hydroxide
L LA
liter long-acting
lab lb. LDL LFT Li
laboratory pound low-density lipoprotein liver function tests lithium
liq. LMP lot LPN
liquid last menstrual period lotion licensed practical nurse
LR
lactated ringer (solution)
mane mcg
in the morning microgram
MD
medical doctor
MDI mEq mEq/L Mg
metered-dose inhaler milliequivalent milliequivalent per liter magnesium
Mistaken as IV (intravenous) or 10 (ten); Instead spell out "units" per Joint Commission's "Do Not Use" List of Abbreviations
Could be confused with 'intravenous pyelogram'
Can be misinterpreted to mean "mg" or milligram, better to spell out 'microgram'
dosage form route of administration route of administration route of administration lab drug or class name drug or class name measurement drug release technology other measurement lab lab drug or class name dosage form other dosage form medical specialty drug or class name time measurement
medical specialty dosage form measurement measurement drug or class name
Medical Abbreviations on Pharmacy Prescriptions mg MgSO4
milligram magnesium sulfate
mL mm mm of Hg mMol MMR
milliliter millimeter millimeters of mercury millimole measle-mumps-rubella (vaccine) molecular weight modified-release
mol wt MR MS
morphine sulfate or magnesium sulfate
MSO4
morphine sulfate
n or noct. N/A N/V, N&V Na
in the night not applicable nausea and vomiting sodium
NAS
intranasal
NDC NGT
National Drug Code nasogastric tube
NH3 NKA NKDA noct. maneq. NP
ammonia no known allergies no known drug allergies night and morning nurse practitioner
May be confused with "MSO4" (morphine sulfate), spell out "magnesium sulfate" Joint Commission's "Do Not Use" List of Abbreviations
Can mean either morphine sulfate or magnesium sulfate, spell out drug name Joint Commission's "Do Not Use" List of Abbreviations May be confused with "MgSO4"; instead spell out "morphine sulfate" Joint Commission's "Do Not Use" List of Abbreviations
measurement drug or class name
measurement measurement measurement measurement drug or class name measurement drug release technology drug or class name
drug or class name
time other other lab or drug or class name route of administration other route of administration other other other time medical specialty
Medical Abbreviations on Pharmacy Prescriptions NPO, n.p.o.
nothing by mouth
NS
normal saline
NSAID NTE O2 OC
nonsteroidal antiinflammatory drug not to exceed oxygen oral contraceptive
o.d., OD
right eye
o.d.
once per day
OJ OM
orange juice otitis media
o.s., OS
left eye
OTC o.u., OU
over-the-counter both eyes
oz p p.r.n., prn PA
ounce after as needed physician assistant
pc PCA
per
after meals patient-controlled analgesia physical exam, pulmonary embolism by or through
per neb
by nebulizer
per os
by mouth, orally
PE
Preferred by AMA to spell out "nothing by mouth"
Can also mean "overdose" or "once daily"; better to spell out Preferred in the UK; Can also mean "overdose" or "right eye"; better to spell out
route of administration drug or class name drug or class name other other drug or class name route of administration, ophthalmic abbreviations time
other medical condition route of administration, ophthalmic abbreviations other route of administration, ophthalmic abbreviations measurement time time medical specialty time other other
AMA prefers to spell out "by mouth" or
route of administration route of administration route of administration
Medical Abbreviations on Pharmacy Prescriptions "orally"; can be mistaken as "os" meaning left eye per FDA PFT pH PharmD
pulmonary function tests hydrogen ion concentration Doctor of Pharmacy
PM PMH PO, p.o.
evening past medical history orally or by mouth
PR, p.r.
per the rectum
PT PTT pulv PV
prothrombin time partial thromboplastin time powder per the vagina
q q.s., qs q12h qd, q1d q2h q3h q4h q6h q6PM, etc q8h qam qd, QD
every as much as needed; a sufficient quantity every 12 hours daily every 2 hours every 3 hours every 4 hours every 6 hours every evening at 6 PM every 8 hours every morning every day
qh qhs
every hour each night at bedtime
qid qn
four times a day Nightly or at bedtime
lab other
AMA prefers to spell out "by mouth" or "orally"
medical specialty time other route of administration route of administration lab lab dosage form route of administration time measurement
Mistaken as q.i.d; Instead write "daily" or "every day" per Joint Commission's "Do Not Use" List of Abbreviations Can be confused with "qh" meaning every hour; better to spell out Not commonly used in U.S.; 'hs' more common for bedtime
time time time time time time time time time time
time time
time time
Medical Abbreviations on Pharmacy Prescriptions qod, QOD, q.o.d
every other day
q.s. ad
add sufficient quantity to make rheumatoid arthritis
RA RDA RE
recommended daily allowances right eye
rep RN
repeats registered nurse
RPh
pharmacist
Rx s s.o.s. sa
prescription without if necessary according to the art; best practice sustained action
SA SBP SID
systolic blood pressure Used ONLY in Veterinary medicine to mean "once daily"
sig codes
medical or prescription abbreviations write on label sublingual, under the tongue serotonin/norepinephrine reuptake inhibitor shortness of breath solution; in solution specific gravity
Sig. SL, s.l. SNRI SOB sol sp gr
Can be mistaken as qd (daily) or qid (four times daily); Instead spell out "every other day" per Joint Commission's "Do Not Use" List of Abbreviations
time
measurement medical condition other route of administration, ophthalmic abbreviations time medical specialty medical specialty other other other other
Can be confused to mean BID (twice daily) and QID (four times daily); pharmacists should clarify abbreviations with DVM, if needed.
drug release technology vital sign time; used in Veterinary medicine ONLY
other other route of administration drug or class name other dosage form lab
Medical Abbreviations on Pharmacy Prescriptions SQ, SC, sub q
subcutaneously
SR
sustained release
ss
sliding scale (insulin) OR 1/2 (apothecary; obsolete)
SSI SSRI
Sliding scale insulin sliding scale regular insulin OR selective serotonin reuptake inhibitor immediately sexually transmitted diseases superior superficial suppository suspension syrup temperature tablet tablespoon transient ischemic attack
stat STD sup. supf. supp susp syr. T tab tbsp TIA TID, t.i.d. tid ac TIN, t.i.n. tinct., tr TIW, tiw
three times a day three times a day before meals three times a night tincture 3 times a week
top.
topical
TO TPN
telephone order total parenteral nutrition
TR
timed-release
troche TSH
lozenge thyroid stimulating hormone teaspoon treatment
tsp Tx
Use caution as "SC" can be mistaken for "SL," meaning sublingual per FDA
Use caution; can be misinterpreted; better to spell out "sliding scale" or "one-half" Spell out words to avoid confusion
route of administration
drug release technology other
other other
time medical condition other other dosage form dosage form dosage form vital sign dosage form measurement medical condition time time
Spell out; can be confused with TID (three times a day)
time dosage form time
route of administration drug or class name drug release technology dosage form lab measurement other
Medical Abbreviations on Pharmacy Prescriptions U or u
unit
UA ud, ut dict, UD ung UTI
urinalysis as directed ointment urinary tract infection
vag, pv
via the vagina
VLDL vol % vol. w/o w/v WBC WNL wt. x XL
very low density lipoprotein volume percent volume without weight in volume white blood cell within normal limits weight multiplied by extended-release
XR
extended-release
XT
extended-release
yo yr Zn
years old year zinc
μEq μg, mcg
microequivalent microgram
μL
microliter
Mistaken as the number "0" (zero), the number "4" (four), or "cc". Prescriber should instead spell out "unit" per Joint Commission's "Do Not Use" List of Abbreviations
measurement
lab other dosage form medical condition route of administration lab
μg or mcg can be misinterpreted as "mg", better to spell out 'microgram'
measurement measurement other measurement lab lab vital sign other drug release technology drug release technology drug release technology other time drug or class drug or class name measurement measurement
measurement
Medical Abbreviations on Pharmacy Prescriptions
Medical Abbreviations on Pharmacy Prescriptions
Medical Abbreviations on Pharmacy Prescriptions