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Monotherapy is the recommended initial treatment for early Parkinson's disease. The pharmacological options for initial treatment include dopaminergic agonists, monoamine oxidase B inhibitors, and levodopa formulations. Several factors should be considered when selecting the optimal treatment, such as disease severity, disease duration, age, activity level, and the risk of developing motor and non-motor complications. Early evidence on the potential role of levodopa formulations in the risk of dyskinesia led to levodopa aversion in the late 1990s and early 2000s, favoring the use of levodopa-sparing options like dopamine agonists. This shift resulted in an increase in behavioral adverse effects, such as impulse control disorders, leading to a subsequent dopamine agonist aversion in the mid-2000s. This review aims to provide a comprehensive evaluation of the existing literature regarding the benefits and drawbacks of levodopa versus levodopa-sparing strategies in drug-naive early-stage Parkinson's disease.

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ABSTRACT Monotherapy is the recommended initial treatment for early Parkinson´s disease. The pharmacological options for initial treatment include dopaminergic agonists, monoamine oxidase B inhibitors, and levodopa formulations. Several factors should be considered when selecting the optimal treatment, such as disease severity, disease duration, age, activity level, and the risk of developing motor and non-motor complications. Early evidence on the potential role of levodopa formulations in the risk of dyskinesia led to levodopa aversion in the late 1990s and early 2000s, favoring the use of levodopa-sparing options like dopamine agonists. This shift resulted in an increase in behavioral adverse effects, such as impulse control disorders, leading to a subsequent dopamine agonist aversion in the mid-2000s. This review aims to provide a comprehensive evaluation of the existing literature regarding the benefits and drawbacks of levodopa versus levodopa-sparing strategies in drug-naive early-stage Parkinson´s disease.

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BACKGROUND: The COVID-19 pandemic had a profound impact on mental health symptoms and quality of life (QoL) in the general population due to necessary public health restrictions such as social distancing. The psychosocial effect of the pandemic on vulnerable groups such as people living with Multiple Sclerosis (PwMS) has been scarcely explored in countries with additional socioeconomical burdens such as access to healthcare disparities METHODS: A questionnaire exploring sociodemographic variables, quality of life, mental health determinants and sleep quality was applied to 92 PwMS to explore changes prior and during the pandemic regarding these domains RESULTS: 58.8% of the subjects were female, median age was 37.1 (± 8.5) years and relapsing-remitting MS was the predominant clinical subtype (83.5%). Unemployment rate significantly increased during the pandemic (12.3% vs 27.8%; p= 0.001). Only 46.4% received medical follow-up care during the pandemic. QoL was affected predominantly due to limitations in instrumented activities of daily life (IADL). Neuropsychiatric symptoms, requiring healthcare during the pandemic, anxiety prior to the pandemic and restricted IADL were predictors of MS-related physical impact worsening, while decreased physical/emotional wellbeing selfcare, neuropsychiatric symptoms, bad sleep quality, anxiety prior to the pandemic and restricted non-instrumental ADL predicted aggravation of MS-related psychological impact measured by the MSIS-29. Curiously, specific items regarding anxiety were more prevalent prior to the pandemic (anxious mood; p=0.02, helplessness; p=0.01), sleep problems; p=0.001 and cardiovascular symptoms; p=0.001, nevertheless, stability was observed for most items. Importantly, 77.3% of PwMS reported at least one neuropsychiatric symptom CONCLUSION: The deleterious effects of the COVID-19 pandemic on psychosocial wellbeing in PwMS, QoL and mental health outcomes are frequently overseen in vulnerable populations such as PwMS. Albeit the limitations of this study, our results may help implement policies that prevent negative outcomes on psychosocial wellbeing due to public health measures (e.g., social distancing) in MS and other neurological diseases that inexorably need constant follow-up.

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Introduction: The burden of non-motor symptoms (NMS) is a major determinant of health-related quality of life in Parkinson's disease (PD), particularly at its late stage.Areas covered: The late stage is usually defined as the period from unstable advanced to the palliative stage, characterized by a combination of emerging treatment-resistant axial motor symptoms (freezing of gait, postural instability, falls and dysphagia), as well as both non-dopaminergic and dopaminergic NMS: cognitive decline, neuropsychiatric symptoms, aspects of dysautonomia, pain and sleep disturbances (insomnia and excessive day-time sleepiness). Here, the authors summarize the current knowledge on NMS dominating the late stage of PD and propose a pragmatic and clinically focused approach for their recognition and treatment.Expert opinion: The NMS progression pattern is complex and remains under-researched. While dopamine-dependent NMS may improve with dopamine replacement therapy, non-dopamine dependent NMS worsen progressively and culminate at the late stages of PD. Furthermore, some PD specific features could interact negatively with other comorbidities, multiple medication use and frailty - the evaluation of these aspects is important in the creation of personalized management plans in the late stage of PD.

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