A prescription written as "Warfarin 2.0 mg" is accidentally interpreted and dispensed as "Warfarin 20 mg." This type of error is caused by the use of a:
- Leading zero
- Look-alike drug name
- Trailing zero (correct answer)
- Sound-alike drug name
Explanation: The correct answer is C. A trailing zero (e.g., 2.0 mg) is dangerous because if the decimal point is overlooked, the dose can be misread as a whole number, leading to a tenfold overdose (20 mg). Safe practice dictates writing "2 mg" instead.