Information about http://www.ismp.org/Tools/errorproneabbreviations.pdf
…
Tags: accredited organization, administration records, communications telephone, designations, double asterisk, drug storage, entry screens, ismp, medical information, medication administration, medication error, medication errors, misinterpretation, national patient, prescriber, safe medication practices, safety goal, storage bins, tjc, using communications,Pages: 2
Language: english
Created: Mon May 23 14:00:59 2005
Display cached document
Page 1
Page 2
Institute for Safe Medication Practices
ISMP's List of Error-Prone Abbreviations, Symbols, and Dose Designations
The Joint Commission (TJC) has established a National Patient
T he abbreviations, symbols, and dose designations found in this table
have been reported to ISMP through the USP-ISMP Medication
Error Reporting Program as being frequently misinterpreted and
Safety Goal that specifies that certain abbreviations must appear on
an accredited organization's do-not-use list; we have highlighted these
involved in harmful medication errors. They should NEVER be used items with a double asterisk (**). However, we hope that you will
when communicating medical information. This includes internal consider others beyond the minimum TJC requirements. By using
communications, telephone/verbal prescriptions, computer-generated and promoting safe practices and by educating one another about
labels, labels for drug storage bins, medication administration records, hazards, we can better protect our patients.
as well as pharmacy and prescriber computer order entry screens.
Abbreviations Intended Meaning Misinterpretation Correction
µg Microgram Mistaken as "mg" Use "mcg"
AD, AS, AU Right ear, left ear, each ear Mistaken as OD, OS, OU (right eye, left eye, each eye) Use "right ear," "left ear," or "each ear"
OD, OS, OU Right eye, left eye, each eye Mistaken as AD, AS, AU (right ear, left ear, each ear) Use "right eye," "left eye," or "each eye"
BT Bedtime Mistaken as "BID" (twice daily) Use "bedtime"
cc Cubic centimeters Mistaken as "u" (units) Use "mL"
D/C Discharge or discontinue Premature discontinuation of medications if D/C (intended to mean Use "discharge" and "discontinue"
"discharge") has been misinterpreted as "discontinued" when followed
by a list of discharge medications
IJ Injection Mistaken as "IV" or "intrajugular" Use "injection"
IN Intranasal Mistaken as "IM" or "IV" Use "intranasal" or "NAS"
HS Half-strength Mistaken as bedtime Use "half-strength" or "bedtime"
hs At bedtime, hours of sleep Mistaken as half-strength
IU** International unit Mistaken as IV (intravenous) or 10 (ten) Use "units"
o.d. or OD Once daily Mistaken as "right eye" (OD-oculus dexter), leading to oral liquid Use "daily"
medications administered in the eye
OJ Orange juice Mistaken as OD or OS (right or left eye); drugs meant to be diluted in Use "orange juice"
orange juice may be given in the eye
Per os By mouth, orally The "os" can be mistaken as "left eye" (OS-oculus sinister) Use "PO," "by mouth," or "orally"
q.d. or QD** Every day Mistaken as q.i.d., especially if the period after the "q" or the tail of Use "daily"
the "q" is misunderstood as an "i"
qhs Nightly at bedtime Mistaken as "qhr" or every hour Use "nightly"
qn Nightly or at bedtime Mistaken as "qh" (every hour) Use "nightly" or "at bedtime"
q.o.d. or QOD** Every other day Mistaken as "q.d." (daily) or "q.i.d. (four times daily) if the "o" is Use "every other day"
poorly written
q1d Daily Mistaken as q.i.d. (four times daily) Use "daily"
q6PM, etc. Every evening at 6 PM Mistaken as every 6 hours Use "6 PM nightly" or "6 PM daily"
SC, SQ, sub q Subcutaneous SC mistaken as SL (sublingual); SQ mistaken as "5 every;" the "q" in Use "subcut" or "subcutaneously"
"sub q" has been mistaken as "every" (e.g., a heparin dose ordered
"sub q 2 hours before surgery" misunderstood as every 2 hours before
surgery)
ss Sliding scale (insulin) or ½ Mistaken as "55" Spell out "sliding scale;" use "one-half" or
(apothecary) "½"
SSRI Sliding scale regular insulin Mistaken as selective-serotonin reuptake inhibitor Spell out "sliding scale (insulin)"
SSI Sliding scale insulin Mistaken as Strong Solution of Iodine (Lugol's)
i/d One daily Mistaken as "tid" Use "1 daily"
TIW or tiw 3 times a week Mistaken as "3 times a day" or "twice in a week" Use "3 times weekly"
U or u** Unit Mistaken as the number 0 or 4, causing a 10-fold overdose or greater Use "unit"
(e.g., 4U seen as "40" or 4u seen as "44"); mistaken as "cc" so dose
given in volume instead of units (e.g., 4u seen as 4cc)
Dose Designations Intended Meaning Misinterpretation Correction
and Other Information
Trailing zero after 1 mg Mistaken as 10 mg if the decimal point is not seen Do not use trailing zeros for doses
decimal point expressed in whole numbers"
(e.g., 1.0 mg)**
© ISMP 2007
"Naked" 0.5 mg Mistaken as 5 mg if the decimal point is not seen Use zero before a decimal point when the
decimal point dose is less than a whole unit
(e.g., .5 mg)**
Institute for Safe Medication Practices
ISMP's List of Error-Prone Abbreviations, Symbols, and Dose Designations (continued)
Dose Designations Intended Meaning Misinterpretation Correction
and Other Information
Drug name and dose run Inderal 40 mg Mistaken as Inderal 140 mg Place adequate space between the drug
together (especially name, dose, and unit of measure
problematic for drug Tegretol 300 mg Mistaken as Tegretol 1300 mg
names that end in "l"
such as Inderal40 mg;
Tegretol300 mg)
Numerical dose and unit 10 mg The "m" is sometimes mistaken as a zero or two zeros, risking a Place adequate space between the dose and
of measure run together 10- to 100-fold overdose unit of measure
(e.g., 10mg, 100mL) 100 mL
Abbreviations such as mg. mg The period is unnecessary and could be mistaken as the number Use mg, mL, etc. without a terminal period
or mL. with a period 1 if written poorly
following the abbreviation mL
Large doses without 100,000 units 100000 has been mistaken as 10,000 or 1,000,000; 1000000 has Use commas for dosing units at or above
properly placed commas been mistaken as 100,000 1,000, or use words such as 100 "thousand"
(e.g., 100000 units; 1,000,000 units or 1 "million" to improve readability
1000000 units)
Drug Name Abbreviations Intended Meaning Misinterpretation Correction
ARA A vidarabine Mistaken as cytarabine (ARA C) Use complete drug name
AZT zidovudine (Retrovir) Mistaken as azathioprine or aztreonam Use complete drug name
CPZ Compazine (prochlorperazine) Mistaken as chlorpromazine Use complete drug name
DPT Demerol-Phenergan-Thorazine Mistaken as diphtheria-pertussis-tetanus (vaccine) Use complete drug name
DTO Diluted tincture of opium, or Mistaken as tincture of opium Use complete drug name
deodorized tincture of opium
(Paregoric)
HCl hydrochloric acid or Mistaken as potassium chloride Use complete drug name unless expressed
hydrochloride (The "H" is misinterpreted as "K") as a salt of a drug
HCT hydrocortisone Mistaken as hydrochlorothiazide Use complete drug name
HCTZ hydrochlorothiazide Mistaken as hydrocortisone (seen as HCT250 mg) Use complete drug name
MgSO4** magnesium sulfate Mistaken as morphine sulfate Use complete drug name
MS, MSO4** morphine sulfate Mistaken as magnesium sulfate Use complete drug name
MTX methotrexate Mistaken as mitoxantrone Use complete drug name
PCA procainamide Mistaken as patient controlled analgesia Use complete drug name
PTU propylthiouracil Mistaken as mercaptopurine Use complete drug name
T3 Tylenol with codeine No. 3 Mistaken as liothyronine Use complete drug name
TAC triamcinolone Mistaken as tetracaine, Adrenalin, cocaine Use complete drug name
TNK TNKase Mistaken as "TPA" Use complete drug name
ZnSO4 zinc sulfate Mistaken as morphine sulfate Use complete drug name
Stemmed Drug Names Intended Meaning Misinterpretation Correction
"Nitro" drip nitroglycerin infusion Mistaken as sodium nitroprusside infusion Use complete drug name
"Norflox" norfloxacin Mistaken as Norflex Use complete drug name
"IV Vanc" intravenous vancomycin Mistaken as Invanz Use complete drug name
Symbols Intended Meaning Misinterpretation Correction
Dram Symbol for dram mistaken as "3" Use the metric system
Minim Symbol for minim mistaken as "mL"
x3d For three days Mistaken as "3 doses" Use "for three days"
> and < Greater than and less than Mistaken as opposite of intended; mistakenly use incorrect Use "greater than" or "less than"
symbol; "< 10" mistaken as "40"
/ (slash mark) Separates two doses or Mistaken as the number 1 (e.g., "25 units/10 units" misread as Use "per" rather than a slash mark to
indicates "per" "25 units and 110" units) separate doses
@ At Mistaken as "2" Use "at"
& And Mistaken as "2" Use "and"
© ISMP 2007
+ Plus or and Mistaken as "4" Use "and"
° Hour Mistaken as a zero (e.g., q2° seen as q 20) Use "hr," "h," or "hour"
**These abbreviations are included on TJC's "minimum list" of dangerous abbreviations, acronyms and symbols that must be included on an organization's
"Do Not Use" list, effective January 1, 2004. Visit www.jointcommission.org for more information about this TJC requirement. Institute for Safe
Medication Practices
Permission is granted to reproduce material for internal newsletters or communications with proper attribution. Other reproduction is prohibited without www.ismp.org
written permission. Unless noted, reports were received through the USP-ISMP Medication Errors Reporting Program (MERP). Report actual and potential
medication errors to the MERP via the web at www.ismp.org or by calling 1-800-FAIL-SAF(E). ISMP guarantees confidentiality of information received and
respects reporters' wishes as to the level of detail included in publications.