Plasma protein binding: Drugs are transported in the bloodstream partly in solution as free (unbound) drug and partly bound to blood components (eg, plasma proteins, blood cells).

• 血浆蛋白结合药物在血流中转运时，一部分是以游离药溶解于血液中（非结合型），另一部分则与血液成分（如血浆蛋白、血细胞）相结合。