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This group comprises preparations used in the treatment of epilepsy.
Combined preparations are classified at separate 5th levels using the corresponding 50-series.
The group is subdivided according to chemical structure.

Combinations of phenytoin and barbiturates are classified in this group.

ATC code	Name	DDD	U	Adm.R	Note
N03AB01	ethotoin	2.5	g	O
N03AB02	phenytoin	0.3	g	O
		0.3	g	P
N03AB03	amino(diphenylhydantoin) valeric acid	0.3	g	O
N03AB04	mephenytoin	0.4	g	O
N03AB05	fosphenytoin	0.45	g	P
N03AB52	phenytoin, combinations
N03AB54	mephenytoin, combinations

List of abbreviations