Parkinson hastalarında motor dalgalanmalar olmadan levodopa'ya ek olarak opikaponun uzun süreli takibi.

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Primary results from the 24-week EPSILON study (NCT04978597) showed that adding opicapone to levodopa in non-fluctuating Parkinson's patients significantly improved motor impairment without increasing the development of motor complications versus placebo. All participants finishing the double-blind phase became eligible for open-label treatment with opicapone. Symptomatic efficacy of opicapone was maintained with 1-year open-label treatment (adjusted-mean ± SE change in MDS-UPDRS motor score from double-blind baseline to Week 76: -7.4 ± 0.81); participants who switched from placebo to opicapone had a motor improvement of -6.1 ± 0.79. At Week 76, 80.2% of opicapone-opicapone-treated participants remained motor complication-free versus 69.7% in the placebo-opicapone group (p = 0.1).

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