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  • Title: Controlled-release carbidopa/levodopa (CR4-Sinemet) in Parkinson's disease patients with and without motor fluctuations.
    Author: Goetz CG, Tanner CM, Shannon KM, Carroll VS, Klawans HL, Carvey PM, Gilley D.
    Journal: Neurology; 1988 Jul; 38(7):1143-6. PubMed ID: 3290706.
    Abstract:
    Sixteen patients with advanced Parkinson's disease (PD) and motor fluctuations were evaluated throughout 12 months of open label therapy on CR4-Sinemet. Reduced dosage frequency and significant motor improvement with reduced fluctuation occurred and were maintained with CR4-Sinemet compared with baseline on Sinemet. In a double-blind protocol using CR4-Sinemet in 20 stable PD patients, CR4-Sinemet was given twice daily and compared with Sinemet given four times daily. Patients remained stable without improvement or deterioration when the long-acting drug was substituted at 50% frequency. Plasma levodopa levels with CR4-Sinemet were smoother than with Sinemet. Although some patients receiving CR4-Sinemet found they functioned more slowly in the morning, the easier dosing schedule and improved amount of "on" time in fluctuators suggest that this formulation may become increasingly useful in managing PD.
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