title: The influence of polymeric excipients on the process of pharmaceutical availability of therapeutic agents from a model drug form. Part I. In formulations with controlled disintegration and release time.
abstract: Pre-formulation research was conducted on the application of Ex. Echinaceae aq. siccum in the production of a quickly disintegrating suspension tablet, a lozenge with kariostatic sugar alcohols (mannitol, sorbitol), and, above all, a solid drug form with controlled release of therapeutic agents included in the extract. Morphological parameters of tablets obtained in the course of experiment were estimated and the profiles of the release (diffusion) ofhydrophilic therapeutic agents into model receptor fluids with varying values of osmolarity (0.1 mol HCl approximately 200 mOsm/l, hypotonic hydrating fluid approximately 143 mOsm/l, and compensatory paediatric fluid approximately 272 mOsm/l) were examined. The study focused on the technological problem of determining the effect of hydrogel Carbopol structure on the ordering of diffusion ofhydrophilic therapeutic agents from a model drug form (a tablet) into model fluids with variable osmolarity.
authors.affiliation: Drug Form Technology Unit, Department of Applied Pharmacy, Medical University in Łodz. michal.nachajski@umed.lodz.pl
authors.forename: Michal Jakub
authors.initials: MJ
authors.lastname: Nachajski
authors.forename: Marian Mikołaj
authors.initials: MM
authors.lastname: Zgoda
mesh_terms: D000180:Acrylic Resins; D001682:Biological Availability; D002626:Chemistry, Pharmaceutical; D003692:Delayed-Action Preparations / Q000737:chemistry*; D004058:Diffusion; D004337:Drug Carriers / Q000737:chemistry*; D005079:Excipients / Q000737:chemistry*; D008956:Models, Chemical; D009994:Osmolar Concentration; D011108:Polymers / Q000737:chemistry*; D011145:Polyvinyls / Q000737:chemistry*; D013607:Tablets
chemical_list: D000180:Acrylic Resins; D003692:Delayed-Action Preparations; D004337:Drug Carriers; D005079:Excipients; D011108:Polymers; D011145:Polyvinyls; D013607:Tablets; C006912:carboxypolymethylene