Treatment of parkinson's disease with the partial dopamine agonist EMD 49980

The motor effects of the partial dopamine agonist EMD 49980 were evaluated in parkinsonian patients under controlled conditions. EMD 49980 monotherapy resulted in a mild improvement in parkinsonian symptoms, but when co‐administered with levodopa, had no significant effect on dyskinesias or on the antiparkinsonian effect of the dopamine precursor. These results suggest that EMD 49980 exerts a net weak dopamine agonist effect but fails to ameliorate levodopa‐induced dyskinesias.