Age (yr)

66 ± 7

Duration of PD (years)

8.6 ± 5.0

Hoehn-Yahr stage (ON period)

3.2 ± 0.8

Antiparkisonian drugs used

Non-ergot dopamine agonist

Pramipexole

n = 24

Ropinirole

n = 14

L-DOPA

Amantadine (n = 12), mg/day

163 ± 53

Zonisamide (n = 9), mg/day

31 ± 11

Entacapone (n = 4), mg/day

425 ± 150