Kinetics studies of protein polypeptide drugs face many challenges because of their low content in organisms, short half-life and vulnerability to interference by endogenous substances.

• 蛋白多肽类药物由于其在生物体内含量低、半衰期短和易受内源性物质干扰等特点而使其体内动力学的研究面临很多挑战。