Comparison of the Cognitive and Behavioral Effects of Eslicarbazepine Acetate and Carbamazepine in Healthy Adults

This study is a double-blind, randomized, two period crossover design. The study consists of
6 visits over a 21 week period. Forty six (46) normal healthy subjects will be treated with
both Eslicarbazepine acetate (ESL, 800 mg/day) and Carbamazepine (CBZ, 800mg/day) for 6 weeks
and 3 days each (maintenance 4 weeks and taper 3 days). Each antiepileptic drug (AED)
treatment period will be followed by a four day taper and washout period off AED for the
remainder of the month. Cognitive and behavioral testing along with safety testing will be
conducted at pretreatment baseline, the end of each randomization AED maintenance period, and
after the final washout period.

Inclusion Criteria:

1. Healthy adults between the ages of 18 and 55 years old.

2. Male or female

Exclusion Criteria:

1. Presence of clinically significant cardiovascular, endocrine, hematopoietic, hepatic,
neurologic, psychiatric, or renal disease or pregnancy.

2. Presence or history of drug or alcohol abuse.

3. The use of concomitant medications, which are known to affect ESL or Carbamazepine or
the use of any concomitant medications that may alter cognitive function (see Section
VII.E for a partial list).

4. Use of oral contraceptive hormones or other medications that could be affected by ESL
or Carbamazepine.

5. Prior adverse reaction to or prior hypersensitivity to either study medication or to
related compounds.

6. Prior participation in studies involving anticonvulsant medications.

7. Subjects who have received any investigational drug within the previous thirty days.

8. Subjects with IQ < 70 as determined by the Peabody Picture Vocabulary Test.

9. Presence of HLA B*1502 in subjects of Asian descent; this will be obtained at
screening in subjects of Asian descent.