TY - JOUR TI - Dissolution testing of modified release products with biorelevant media: An OrBiTo ring study using the USP apparatus III and IV AU - Reppas, C. AU - Vrettos, N.-N. AU - Dressman, J. AU - Andreas, C.J. AU - Miyaji, Y. AU - Brown, J. AU - Etherson, K. AU - Hanley, S. AU - Karkossa, F. AU - Karlsson, E. AU - Klein, S. AU - Maier, G.-M. AU - McAllister, M. AU - Mistry, N. AU - Rosenblatt, K. AU - Schäfer, K.J. AU - Smith, K.L. AU - Tomaszewska, I. AU - Williams, J. AU - Winge, F. AU - Vertzoni, M. JO - European Journal of Pharmaceutics and Biopharmaceutics PY - 2020 VL - 156 TODO - null SP - 40-49 PB - Elsevier B.V. SN - 0939-6411 TODO - 10.1016/j.ejpb.2020.08.025 TODO - carvedilol; ciprofloxacin; ciprofloxacin; ciprofloxacin, hydrocortisone drug combination; hydrocortisone, Article; drug solubility; food drug interaction; in vitro study; pH; reproducibility; water solubility; bioavailability; chemistry; drug combination; drug effect; drug release; food drug interaction; gastrointestinal tract; human; medicinal chemistry; physiology; procedures; solubility, Biological Availability; Chemistry, Pharmaceutical; Ciprofloxacin; Drug Combinations; Drug Liberation; Food-Drug Interactions; Gastrointestinal Tract; Humans; Hydrocortisone; Solubility TODO - During the OrBiTo project, our knowledge on the gastrointestinal environment has improved substantially and biorelevant media composition have been refined. The aim of this study was to propose optimized biorelevant testing conditions for modified release products, to evaluate the reproducibility of the optimized compendial apparatus III (USP apparatus III) and compendial apparatus IV (USP apparatus IV, open-loop mode) dissolution methods and to evaluate the usefulness of these methods to forecast the direction of food effects, if any, based on the results of two «ring» studies and by using two model modified release (MR) products, Ciproxin / Cipro XR and COREG CR. Six OrBiTo partners participated in each of the ring studies. All laboratories were provided with standard protocols, pure drug substance, and dose units. For the USP apparatus III, the dissolution methods applied to Ciproxin / Cipro XR, a monolithic MR product of an active pharmaceutical ingredient (API) with moderate aqueous solubility, were robust with low intra- and inter-laboratory data variability. Data from all partners were in line on a qualitative basis with food effect data in humans. For the USP apparatus IV, the dissolution methods applied to COREG CR, a multiparticulate, pH dependent, MR product of an API with low and pH dependent solubility led to high intra- and inter- laboratory data variability. Data from all partners were in line, on a qualitative basis, with the previously observed food effects in humans. © 2020 Elsevier B.V. ER -