I undersøgelse I blev 404 patienter randomiseret til behandling med enten placebo (138 patienter), rasagilin 1 mg dagligt (134 patienter) eller rasagilin 2 mg dagligt (132 patienter) i 26 uger; man sammenlignede ikke med et andet aktivt stof.
In study I, 404 patients were randomly assigned to receive placebo (138 patients), rasagiline 1 mg/ day (134 patients) or rasagiline 2 mg/ day (132 patients) and were treated for 26 weeks, there was no active comparator.