Amantadine   30 studies
Apomorphine   15 studies
Benserazide   2 studies
Benztropine   6 studies
Biperiden   2 studies
Bromocriptine   11 studies
Cabergoline   16 studies
Carbidopa   53 studies
Dexetimide   240 studies
Droxidopa   6 studies
Entacapone   25 studies
Gabapentin   98 studies
Levodopa   138 studies
Lisuride   5 studies
Memantine   78 studies
Piribedil   3 studies
Pramipexol   60 studies
Ropinirole   43 studies
Selegiline   22 studies
Sinemet   32 studies
Tolcapone   3 studies
Trihexyphenidyl   1 study