Table 12.3-4. General overview of common modern antiseizure drugs

Drug

Common daily dose (mg)a

Common starting dose (mg)b

First daily target dose (mg)c

p450d

Comments

Carbamazepine

600-1200

100-200

600-900

Inducer

Self-induction at p450

Lamotrigine

100-300

25

100

Slow titration mandatory

Levetiracetam

1000-3000

250-500

1000-1500

Excreted by kidneys

Lacosamide

100-400

50-100

150-200

Excreted by kidneys

Oxcarbazepine

600-1800

300

900-1200

Inducer

Prodrug; converted to 10-OH-CBZ

Perampanel

6-12

2

4-6

Very long half-life

Topiramate

50-200

25-50

100-150

Inducer

Hepatic enzyme induction >200 mg

Valproic acid

900-2000

300-500

900-1200

Inhibitor

Caution when adding to lamotrigine

Zonisamide

100-400

50

100-200

Long half-life

a The common daily dose refers to average levels. The upper value does not represent the maximum dose.

b The common starting dose refers to usual starting doses per day.

c The first daily target dose is a suggestion and refers to doses to be targeted by slow titration.

d Agents with significant impact on drug metabolism by the liver.