Iopamidol (INN, trade names Iopamiro, Isovue, Iopamiron, and Niopam) is a nonionic, low-osmolar iodinated contrast agent, developed by Bracco. Iopamidol (INN, trade names Iopamiro, Isovue, Iopamiron, and Niopam) is a nonionic, low-osmolar iodinated contrast agent, developed by Bracco.