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We investigated the influence of 2 weeks of treatment with deprenyl on the acute effect of a single dose of 200 mg of L-dopa in a double-blind cross-over placebo-controlled trial in 16 parkinsonian patients with wearing-off phenomena. Deprenyl induced no significant benefit in the duration or the maximal improvement of L-dopa's effect. Moreover, deprenyl treatment did not improve the patient's motor status.
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Rascol et al. (1988) studied this question.
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