Table 3.

Medication error types in potential and preventable potential ADEs

Error types	Potential ADEs	Preventable ADEs
Late administration	363 (27%)	14 (29%)
Not dispensed or dispensed late	300 (22%)	1 (2%)
Wrong or inappropriate information	136 (10%)	5 (10%)
Omitted administration	105 (8%)	5 (10%)
Omitted information	98 (7%)	1 (2%)
Overdose	59 (4%)	5 (10%)
Error prone abbreviations	52 (4%)
Underdose	45 (3%)
Duplicate	30 (2%)
Other (e.g., failure to discontinue medication)	24 (2%)	7 (15%)
Wrong drug	21 (2%)	1 (2%)
Not transcribed	19 (1%)	1 (2%)
Allergy	18 (1%)	2 (4%)
Wrong patient	16 (1%)
Illegible order	16 (1%)
Failure to renew	15 (1%)	1 (2%)
Administered but not documented	12 (1%)	1 (2%)
Incomplete or no documentation	7 (1%)
Administered without order	7 (1%)
Late transcription	5 (1%)
Transcribed without order	4 (1%)
Failure to act	3 (1%)	3 (6%)
Drug-drug interaction	1 (1%)	1 (2%)
Total # of errors	1,356 (100%)	48 (100%)