Hormonal and Lipid Levels in Male Subjects After a Switch From Carbamazepine to Lacosamide

4-Week Titration Period: start dose Lacosamide (LCM) is 100 mg/day - up-titration of 100 mg/week LCM 8-Week Maintenance Period: dose can change first 4 weeks with 100 mg/week, must remain between 300 mg/day and 600 mg/day. Dose must remain stable last 4 weeks.

Levetiracetam (LEV) is taken at a stable dose 30 days before study entry and is ≥ 1000 mg/day at the first visit. The LEV dose may not be changed at any time.