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  • Title: ["Beginning and end of dose" dyskinesias caused by L-DOPA].
    Author: Lhermitte F, Agid Y, Signoret JL, Studler JM.
    Journal: Rev Neurol (Paris); 1977 May; 133(5):297-308. PubMed ID: 897439.
    Abstract:
    The four cases of dyskinesia at the "beginning and end of dose" caused by L-Dopa presented in this series were characterized by four essential features: 1) their onset at the beginning and end of the period of effectiveness of a dose of L-Dopa + IDC (benserazide); 2) their ballic and dystonic appearance associated with a reinforcement of Parkinsonian signs; 3) the possibility of their reduction by an increase and fractionning of the daily dose of L-Dopa; 4) the particular nature of the underlying Parkinsonian problem in which they were seen, i.e. the young age at onset of the disease, the severity of akinesia, and the quality of the clinical response to L-Dopa. Thus on the basis of the circumstances of their development, their appearance, and their treatment, such forms of dyskinesia at the "beginning and end of dose" appear to be different from classical "mid-dose" dyskinesia. In addition, they pose a new physiolopathological problem.
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