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Adherence to therapy largely determines the success of treatment interventions: low levels of adherence are associated with reduced treatment effectiveness. For many chronic diseases, the level of adherence to treatment is about 50% or less, which confirms the relevance of this topic and requires its research. The high costs of treatment, the need for long-term continuous use of drugs and the special socio-economic significance of a disease such as multiple sclerosis (MS) determine the importance of maintaining a high level of adherence to its treatment. An analysis of literature data on the concept of treatment adherence, methods of its definition and influencing factors was carried out, the values of the level of adherence in the treatment of MS, as well as measures to maintain it during the COVID-19 pandemic were considered. Increasing awareness of healthcare professionals about the problem of treatment adherence and ways to improve it helps to improve the efficiency of managing patients with MS. The paper considers the primary stage of the strategy to improve treatment adherence among patients with MS, namely the formation of expanded knowledge of the problem by specialists of a multidisciplinary team involved in the diagnosis and treatment of patients with MS.

The article is a systematic review of the literature data summarizes to date on the issue of COVID-19-associated anosmia. We mainly used full-text and abstract electronic databases (PubMed, Scopus and Web of Science). The paper discusses hypothetical mechanisms of development, clinical features, as well as methods of diagnosis and treatment of COVID-19-associated anosmia.

This paper reports two cases of Guillain-Barre syndrome associated with coronavirus infection COVID-19. The clinical symptoms and neurological status of patients, the data of the additional examination and the features of the prescribed therapy are described in detail. The issue of the tropicity of the SARS-CoV-2 virus to human nervous tissue and its possible ways of affecting the peripheral nervous system is discussed.

This review addresses current issues in post-COVID syndrome with a focus on neurocognitive impairment. The results of studies on complications in patients of different ages and health statuses recovered from mild to severe COVID-19 are discussed. Current data on the pathogenetic mechanisms of the development of various post-COVID disorders are presented, including a detailed discussion of central nervous system damage. The paper summarizes data on the relationship between neurocognitive disorders and accelerated cell aging, chronic nonspecific inflammation, and reduced neuroplasticity in the central nervous system. The main pathogenetic ways to prevent COVID-related complications, including neuronal tissue damage and the prospects for managing such patients are discussed. The choice of pathogenetic therapy in patients with neurocognitive impairment in the post-COVID period is assessed. The main benefits of choline alfoscerate therapy for neurocognitive impairment in patients with post-COVID syndrome are discussed.