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Question
Why do pharmacy safety guidelines recommend against writing a trailing zero, such as '5.0 mg' instead of '5 mg'?
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Answer
A.If the decimal point is missed or not seen clearly, '5.0' can be misread as '50', causing a tenfold overdose
B.Trailing zeros make prescriptions look unprofessional
C.Trailing zeros are required for controlled substances only
D.There is no actual risk; it is simply a style preference
A missed decimal point turns '5.0 mg' into '50 mg' -- a dangerous tenfold error -- so ISMP recommends writing whole numbers without a trailing zero. This is a genuine patient safety rule, not a style preference, and it applies broadly, not just to controlled substances.