Low-osmolar
A solution with a moderate osmolality or concentration of dissolved particles (salts, sugars, proteins, acids etc.). Used to describe contrast media with a slightly higher particle concentration than in body fluids (2-3 times). Such contrast media may cause pain and heat when injected, but far less than high-osmolar contrast media. Other undesirable reactions are also less severe and less frequent. See also terms ionic and high-osmolar.
GE Healthcare Glossary