Table 5. Medication status.

We recorded if the patient received the following: LEV only, VPA only, LEV initially and then switched to VPA (LEV to VPA), VPA initially and then switched to LEV (VPA to LEV), LEV to VPA and then switched back to LEV, both LEV and VPA (no change between the two medications), the total number of patients on LEV, and the total number of patients on VPA.

LEV: Levetiracetam; VPA: Valproic acid.

Medication status	Number of patients
LEV only	796
VPA only	2
LEV to VPA	65
VPA to LEV	2
LEV to VPA and VPA to LEV	6
LEV and VPA (no switch)	29
Total LEV	898
Total VPA	104