Objectives. To characterize the pharmacokinetic profile of levodopa (L-dopa) and carbidopa after repeated doses of the effervescent\ntablet of melevodopa/carbidopa (V1512; Sirio) compared with standard-release L-dopa/carbidopa in patients with fluctuating\nParkinson�s disease. Few studies assessed the pharmacokinetics of carbidopa to date. Methods. This was a single-centre, randomized,\ndouble-blind, double-dummy, two-period crossover study. Patients received V1512 (melevodopa 100 mg/carbidopa 25 mg) or L dopa\n100mg/carbidopa 25mg, 7 doses over 24 hours (Cohort 1), 4 doses over 12 hours (Cohort 2), or 2 doses over 12 hours in\ncombination with entacapone 200 mg (Cohort 3). Pharmacokinetic parameters included area under the plasma-concentration\ntime curve (AUC), maximum plasma concentration (
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