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Introduction: According to current understanding of the role of excipient in medicines, they could not be considered as completely pharmacologically inert substances. Although excipients do not have the potential to cause adverse drug reactions (ADRs) in most patients, some of their negative effects have been established. Special caution regarding excipients intake is advised, especially in vulnerable populations such as pediatric one. Aim: The aim of this paper was to investigate the exposure of children on antibiotic therapy to excipients with known effects (EKE). Methods: During a one-month period antibiotic prescriptions data were taken from community pharmacies in Novi Sad, Serbia. Age, diagnosis and prescribed therapy were observed. Data about qualitative content of prescribed medicines were taken from Summaries of Product Characteristics (SmPC) available at the official website of Medicines and medical devices agency of Serbia (ALIMS). Excipients were considered to be potentially harmful if they were listed in European Medicines Agency (EMA) guidelines. Results: The most commonly observed diagnosis was a respiratory infection, which affected more than 88% of children prescribed with an antibiotic. Only 5 out of 33 prescribed antibiotic formulations did not contain at least one EKE. Prescribed medicines mostly contained sodium compounds (77.78%), sucrose (34.07%) and sodium benzoate (31.11%). In addition, the following EKE were detected: propylene glycol, aspartame, sorbitol, lactose, potassium, mannitol, benzalkonium chloride, azorubine, parabens, sodium metabisulfite and sunset yellow. Around 75% of prescribed antibiotic formulations contained inappropriately labeled EKE (sodium and potassium compounds, sodium benzoate and propylene glycol). Additionally, inappropriately labeled information leaflets did not include possible adverse effects caused by the EKE. Conclusions: This paper indicates high exposure of patients to EKE, where almost all children treated with antibiotics (96.3%) were simultaneously administered at least one EKE. We confirmed that approved medicines cannot meet the treatment needs of all patients, and that inappropriately labeled medicines carry a risk of ADRs, especially in newborns. Personalized treatment is especially important in children, as the appropriate dosage forms and diversity in formulation ingredients is lacking. Knowing the type and roles of each ingredient of the medicines it is possible to formulate a preparation that will meet all the individual children's needs.

Introduction: Community-acquired pneumonia is one of the most common diseases in infancy but most of these diseases have relatively simple course. We are presenting a case of child who developed lung abscess as a complication of pneumonia. Case Report: The goal of our case report is to point out that lung abscess is a relatively rare entity whose development is not always typical, sudden and acute, but also hidden, inconspicuous and perfidious. Although clinical picture and laboratory findings indicated that the pneumonia was cured, a single control CT scan showed that there was inflammation (hotspot) in the organism. Discussion: Lung abscess is a rare state which is developed as a complication only at 1% of pneumonias. Complications are rare and depend on the previous immunological status of the child and the presence of comorbidity. The duration of antibiotic therapy depends on the clinical and radiographic response of the patient. The chosen antibiotics have to cover a wide specter of Gram-positive and Gram-negative bacteria. Conclusions: The key role in making a diagnosis played radiological methods which were crucial in monitoring the evolution of the change itself, from its creation to regression. The triple antibiotic therapy with meropenem, vancomycin and metronidazole enabled an (excellent) recovery outcome.