Do Not Use Potential Problem Use Instead
U, u (unit) Mistaken for “0” (zero), the number “4” (four) or “cc” Write “unit”
IU (International Unit) Mistaken for IV (intravenous) or the number 10 (ten) Write “International Unit”
Q.D., QD, q.d., qd (daily) Mistaken for each other Write “daily”
Q.O.D., QOD, q.o.d, qod
(every other day)
Period after the Q mistaken for “I” and the “O” mistaken for “I” Write “every other day”
Trailing zero (X.0 mg)* Decimal point is missed Write X mg
Lack of leading zero (.X mg) Decimal point is missed Write 0.X mg
MS Can mean morphine sulfate or magnesium sulfate Write “morphine sulfate”
MSO4 and MgSO4 Confused for one another Write “magnesium sulfate”

Joint commission do not use list referenced from: ( JCAHO The Joint Commission. ) See "dnu_list.pdf" and "Facts about the Official "Do Not Use" List of Abbreviations". jointcommission.org. (2020). Retrieved January 20, 2020.

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