Simulations Plus, Inc. announced that it has released version 6 of its in vitro dissolutionmodeling software, DDDPlus. Key improvements include: New formulation models for advanced technologies, including long-acting injectable options developed through the funded collaboration with the U.S. FDA; New models for in vitro biorelevant dissolution experiments, including Artificial Stomach and Duodenum (ASD), Biphasic, and Membrane systems; Enhanced multistage dissolution capabilities to guide improved in vitro-in vivo correlation (IVIVC) development with GastroPlus; Improved options for modeling precipitation kinetics.