I disse undersøgelser registreredes virkningen af at bruge enten Comtess eller placebo (virkningsløs medicin) som tillægsbehandling til patientens kombinationsbehandling med levodopa og carbidopa eller levodopa og benserazid.
The main measure of effectiveness was the time spent in the ‘ on’ state (the time when levodopa is controlling the symptoms of Parkinson’ s disease) after the first levodopa dose of the morning in the first study, and over one day in the second study.