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The efficacy and safety of two dosages of tolcapone were compared in a 12-week crossover trial involving 118 nonfluctuating patients with PD on a stable dose of levodopa (L-Dopa). At trial onset, all patients received open-label tolcapone 100 mg three times daily for 4 weeks. At week 4, 116 eligible
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Recent prospective, double-blind, placebo-controlled trials have examined the long-term effects of the catechol-O-methyl transferase (COMT) inhibitors entacapone and tolcapone as adjuncts to levodopa in PD patients with wearing-off motor fluctuations. These studies demonstrate that both tolcapone
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OBJECTIVE
Assess motor function and quality of life (QoL) in Parkinson's disease (PD) subjects with end-of-dose wearing off (EODWO), comparing immediate and delayed switch (IS, DEL) to levodopa/carbidopa/entacapone (LCE).
BACKGROUND
LCE treatment improves motor function in PD patients with EODWO.
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We performed a 39-week, randomized, double-blind, multicenter study to compare the efficacy, safety, and tolerability of levodopa/carbidopa/entacapone (LCE, Stalevo) with levodopa/carbidopa (LC, Sinemet IR) in patients with early Parkinson's disease (PD). Four hundred twenty-three patients with
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BACKGROUND
More than 50% of patients with Parkinson's disease develop motor response fluctuations (the "wearing off" phenomenon) after more than five years of levodopa therapy. Inhibition of catechol-O-methyltransferase by tolcapone has been shown to increase levodopa bioavailability and plasma
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AFQ056 is a novel, selective metabotropic glutamate receptor 5 antagonist. This was a 13-week, double-blind, placebo-controlled study. Patients with Parkinson's disease and moderate-to-severe levodopa (l-dopa)-induced dyskinesia who were receiving stable l-dopa/anti-parkinsonian treatment and were
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In this 12-week, randomized, open-label, blinded-rater, parallel-group trial, the efficacy, safety, and tolerability of tolcapone and pergolide were compared in parkinsonian patients with a fluctuating response to levodopa. Patients received tolcapone 100 mg three times daily (t.i.d.), with a
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After 40 years of clinical experience, levodopa remains the gold standard treatment for Parkinson's disease (PD) despite the recent emergence of a host of new therapies. Some physicians are cautious when prescribing levodopa because of its association with motor complications. Evidence now suggests
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To investigate whether increased fixed carbidopa doses of 65 or 105 mg (ODM-101/65 and ODM-101/105) in combination with 75, 100, 125, or 150 mg of levodopa and 200 mg of entacapone might improve "off" time in fluctuating Parkinson disease (PD) compared to the standard
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The primary objective of this study was to assess the effect of tolcapone on levodopa dosage in parkinsonian patients whose "wearing-off" phenomenon has been controlled with more frequent levodopa dosage. After a 1-week placebo run-in, 97 patients were assigned randomly to receive placebo or
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OBJECTIVE
To study the effect and safety of entacapone as an adjunct to levodopa treatment in patients with PD with wearing-off motor fluctuations.
BACKGROUND
Entacapone is a catechol-O-methyltransferase (COMT) inhibitor that has been shown to increase the area under the concentration-time curve of
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BACKGROUND
Manganese is known to cause a parkinsonian syndrome similar clinically to Parkinson disease (PD). L-Dopa responsiveness is a hallmark of PD; however, L-dopa's effect on manganese-induced parkinsonism is not well defined.
OBJECTIVE
To access the efficacy and safety of L-dopa therapy in a
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Opicapone is a new catechol O-methyltransferase (COMT) inhibitor indicated for use as adjunct to levodopa therapy in patients with Parkinson's disease (PD) and motor fluctuations.To characterize the safety and tolerability of adjunct opicapone (25 and 50
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OBJECTIVE
To introduce entacapone, a new catechol-O-methyltransferase inhibitor, and discuss its pharmacology, pharmacodynamics, pharmacokinetics, clinical efficacy, drug interactions, adverse events, dosage guidelines, and therapeutic and formulary considerations.
METHODS
A MEDLINE database search
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The development of catechol-O-methyltransferase (COMT) inhibitors for the adjunct treatment to levodopa and aromatic L-amino acid decarboxylase (AADC) inhibitors in Parkinson's disease started in the late 1950s. The first-generation inhibitors were associated with toxic properties: they induced
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