Medicated chewing gums (MCGs) represent a beneficial platform for realizing drugs intended for dental prophylaxis and treatment. The present study aimed to investigate the impact of compression force on the mechanical, textural, release, and chewing perception characteristics of compressible MCGs with the combination of lysozyme hydrochloride (LH) and ascorbic acid (AsA). Four batches of MCGs were obtained on a laboratory single-punch tablet machine applying different forces, i.e., 5, 7, 10, and 15 kN, and evaluated by their geometrical parameters, mechanical resistance, surface and internal structure characteristics, texture profile, release behavior, and perception attributes during mastication. It was found that increasing compression force slightly affected resistance to crushing and friability of MCGs, but resulted in surface smoothing and formation of a thicker layer with highly compacted particle arrangement. According to the texture analysis, increasing compression force led to harder and more adhesive gums, indicating possible difficulties in chewing and, therefore, impairment of their consumer properties. Lower compression forces were also found to be preferable in terms of better drug release from the obtained chewing gums. The volunteers’ assessment showed that an increase of compression force led to significantly raising the initial hardness and crumbliness as well as to decreasing the rate of the integral gum mass formation during mastication, which may negatively affect perceptive sensations when using MCGs. Based on the results obtained, the optimal compressing force was selected to be 7 kN, which allows obtaining MCGs with good organoleptic, mechanical, textural, and release properties.

Today, medicines made in pharmacies are increasingly attracting consumers' attention and are in growing demand in Ukraine. Pharmacy production faces a number of problems, including the study of the stability of extemporaneous dosage forms and the determination of an optimal shelf life. 1 % and 2 % water silver proteinate solutions used in ophthalmology, otolaryngology and nephrology are produced in Ukrainian pharmacies both extemporaneously and as a reserve. The aim. The aim of the work is to develop methods for quality support and study the chemical stability of 1 % and 2 % water solutions of silver proteinate, and to study the microbiological purity to extend the storage time of nasal drops. Materials and methods. A study of the chemical stability of 1 % and 2 % water silver proteinate solutions of pharmaceutical production is carried out using chemical identification reactions (to silver and protein), quantitative determination by thiocyanatometric titrimetric method and determination of microbiological purity. Results. The validation characteristics of the method for the quantitative thiocyanatometric determination of silver proteinate were studied (the correlation coefficient r = 0.9995 and 0.9996; the systematic error – 0.26 % and 0.03 %, the relative confidence interval – 0.88 % and 0.74 % for 1 % and 2 % solutions, respectively), as well as its suitability for this purpose was proven. “Silver proteinate solution, 1.0 %” and “Silver proteinate solution, 2.0 %” prepared in the pharmacy were studied for 150 days by the “Microbiological purity” indicator and were biologically stable. Conclusions. The chemical identification reactions and methods for the quantitative determination of silver proteinate in an extemporaneous dosage form used to study the chemical stability of the drug have been proposed. The study results of the chemical stability and microbiological purity allow us to recommend pharmacies to extend the shelf life of nasal drops containing silver proteinate as an active pharmaceutical ingredient for 150 days

The aim. Development of the composition of dental films for remineralization, treatment and prevention of dental hyperesthesia, prevention of the formation of microbial biofilms, elimination of pathogenic microflora. Methods. Determination of crystallographic characteristics, uniformity of particle distribution and their ability to aggregation was carried out by microscopy, viscosity – by rotational viscometer, pH-potentiometrically. The tensile strength of the films, the ability to stretch and lengthen, the strength of the bioadhesive bond were investigated by a texture analyzer, the thickness of the films – by calipers. Antimicrobial activity was determined by the disk-diffusion method and by the effectiveness of antimicrobial preservatives. Results. The choice of CHA concentration (10 %) was based on the analysis of literature sources. Structural-mechanical and organoleptic studies established the feasibility of using a combined system with the inclusion of purified water, glycerin and macrogol 400. The study of sedimentation and aggregation stability of the samples showed a uniform distribution of particles in samples from PVA, HEC, HPC. Films from Sodium Alginate, PVP, Na-CMC and HPMC were excluded from the work due to unsatisfactory properties. Structural-mechanical and physico-chemical properties allowed us to choose 5 % PVA as the film former, and 4 % glycerin as the plasticizer. The concentrations of API (metronidazole and chlorhexidine) were selected based on antimicrobial activity and preservative effect. Conclusions. As APIs, CHA – a remineralizing, anti-caries agent, metronidazole and chlorhexidine – antimicrobial components were selected. The introduction of CHA is rational in a complex dispersion medium, metronidazole as a suspension with glycerin, chlorhexidine as a 20 % solution. The composition of the film base was substantiated. The concentrations of metronidazole and chlorhexidine bigluconate were determined. The developed drug met the specifications of the MQC