an open cross-over study of 20 patients with parkinson 's disease performed with two drugs containing l-dopa and a peripheral aromatic amino acid decarboxylase inhibitor ( benserazide , carbidopa ) confirmed the conclusions reached in other clinical trials that this combined treatment of parkinson 's disease is the most effective form of drug therapy available at present .
C0023570
l-dopa
C0030567
parkinson 's disease