Intermittent vs Continuous Levodopa Administration in Patients With Advanced Parkinson Disease

Abstract

This study confirms that a continuous levodopa infusion is associated with reduced motor complications compared with the standard oral formulation of the drug in patients with advanced PD. Pharmacokinetic studies demonstrate that reduced motor complications are associated with avoiding low plasma levodopa trough levels and are not adversely affected by relatively high plasma levodopa concentrations. We propose that if levodopa/carbidopa could be administered orally in a manner that mirrors the pharmacokinetic pattern of the infusion, it might lead to a similar reduction in motor complications.