Measurement
μg
Microgram
Risk
A visually similar microgram abbreviation can be mistaken for "mg" (milligram), creating a 1000-fold overdose risk.
Safer Alternative
Write "mcg"
Example
100 μg misread as 100 mg
Source Note
Current ISMP 2024 PDF lists the micro sign "µg"; this visually similar Greek mu variant is included for search coverage.