Relevance: despite the available methods and medicines, rhinosinusitis occupies a leading place in the structure of diseases of the upper respiratory tract. Rhinosinusitis can be a consequence of respiratory viral infections, can be an independent nosological unit. In recent years, there has been a protracted course of rhinosinusitis with a long recovery period with chronic inflammation in the paranasal sinuses and nasal cavity. Purpose of the study: to analyze the validity and effectiveness of therapeutic approaches to the treatment of chronic rhinosinusitis using the Polydexa with phenylephrinum nasal spray with phenylephrine Materials and мethods: The study included 121 patients — 61 (50.41 %) women and 60 (49.59 %) men aged 25 to 50 years, a history of chronic rhinosinusitis in the stage of clinical exacerbation at the time of the study. All patients underwent: otorhinolaryngological examination, general clinical and radiological (radiography or computed / magnetic resonance imaging of the paranasal sinuses). Cytological examination of the detachable nasal cavity was carried out to study the calculation of the relative number of neutrophilic granulocytes, macrophages, epithelial cells, lymphocytes. Microbiological examination of the detachable nasal cavity and paranasal sinuses included the study of the qualitative and quantitative composition of pathogenic and opportunistic organisms on the surface of the nasal mucosa. Results: in patients with chronic rhinosinusitis in the stage of clinical exacerbation, an increase in the relative content of inflammatory elements was revealed in the nasal secretion against the background of the prevailing content of pathogenic staphylococci and streptococci. The use of topical preparations containing antibacterial components of a broad antimicrobial spectrum of action, dexamethasone, phenylephrine hydrochloride helps to relieve inflammation on the surface of the mucous membranes of the nasal cavity and paranasal sinuses. Conclusions: a method of treating chronic rhinosinusitis in the stage of clinical exacerbation using a combined preparation for topical application containing neomycin sulfate, polymyxin B sulfate, dexamethasone sodium metasulfobenzoate, phenylephrine hydrochloride has a pronounced anti-inflammatory, decongestant, antibacterial effect
