Osmolality testing is a laboratory test performed to determine the osmotic concentration of a fluid. It helps assess water and electrolyte balance by measuring the total concentration of solutes in fluids.
This test is used to ensure the safety and effectiveness of drug formulations. Osmolality testing of drug products helps maintain the stability and effectiveness of the formulation. In particular, intravenous drugs must have the correct osmolality to be safely administered intravenously.