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l-Dopa has long been the mainstay of therapy for Parkinson's disease but its long-term shortcomings, principally uncoordinated, spasmodic or irregular movements (dyskinesias) and fluctuating control of motor symptoms (on/off fluctuations), are well documented. The postulated neuroprotective properties of l-deprenyl, often used as an adjunct to l-dopa, are under scrutiny and doubts have also been raised...
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