Table 3.

The different types of adverse drug events experienced by subjects taking phenytoin and levetiracetam who did not have missing electronic health record information, and the incidence proportions of subjects who experienced each type of event

Adverse drug effect	Phenytoin arm (n = 122)	Levetiracetam arm (n = 164)
Decreased level of consciousness	5 (4.1)	0 (0.0)
Liver dysfunction	4 (3.3)	1 (0.6)
Rash	4 (3.3)	0 (0.0)
Persistent fevers	3 (2.5)	0 (0.0)
Neutropenia	1 (0.8)	0 (0.0)
Vertigo	2 (1.6)	0 (0.0)
Drug switch	7 (5.7)	1 (0.6)
Cognitive problems	0 (0.0)	0 (0.0)
Fatigue	0 (0.0)	1 (0.6)
Vomiting	0 (0.0)	1 (0.6)
Decreased appetite	0 (0.0)	1 (0.6)
Death	0 (0.0)	1 (0.6)
Total	26 (21.3)	6 (3.7)