Features of complex formation of native and polymeric β-cyclodextrins with sulfasalazine

Abstract

The work is devoted to the study of the complex formation of sulfasalazine with native and polymeric β-cyclodextrins in buffer solutions with a physiological pH value using isothermal saturation and 1H NMR methods. It was established that sulfasalazine forms two types of complexes when interacting with the cyclodextrins under consideration, but only the process of formation of inclusion complexes determines the observed increase in drug solubility, which is more pronounced in the presence of polymeric β-cyclodextrin. It was determined that complexation with β-cyclodextrin and its polymeric derivative leads to a decrease in the permeability coefficients of sulfasalazine through the model membrane, which is determined by both the stability constant of the complexes and their ability to pass through the membrane.