Standardization challenges in antipsychotic drug monitoring: insights from a national survey in Chinese TDM practices

Urgent standardization of Chinese TDM practices is needed, including harmonized systems and traceable calibrators. While commercial kits enhance result consistency, further efforts are required to harmonize performance across manufacturers. Lyophilized materials are optimal for EQA due to their stability and ease of transport. These findings offer actionable insights to improve the quality and comparability of antipsychotic TDM in clinical practice.