Frequency of adverse drug events and preventable adverse drug events by drug class

Drug class	Total adverse drug events (n = 815) N (percent)	Preventable adverse drug events (n = 338) N (percent)
Warfarin	121 (15)	42 (12)
Atypical antipsychotics	92 (11)	42 (12)
Loop diuretics	69 (8)	33 (10)
Opioids	51 (6)	26 (8)
Antiplatelets	46 (6)	23 (7)
ACE inhibitors	45 (6)	27 (8)
Antidepressants	43 (5)	25 (7)
Laxatives	43 (5)	16 (5)
Benzodiazepines (intermediate acting)	39 (5)	30 (9)
Insulins	37 (5)	18 (5)

Adverse_drug_events.htm

Only drug classes with the frequency of adverse drug events of 5 percent and more are presented. Some adverse drug events were associated with more than one drug class.

ACE: angiotensin-converting enzyme.

Adapted with permission from: Gurwitz, MD, Field, T, Judge, J, Rochon, P, et al. The incidence of adverse drug events in two large academic long-term care facilities. Am J Med 2005; 118:251. Copyright © 2005 Excerpta Media.

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Frequency of adverse drug events and preventable adverse drug events by drug class