治疗药物监测是近十多年在临床药物治疗中兴起的一项有效监护手段,在国外某些药物的常规监测已成为临床医疗标准的一部分。在医学肿瘤学方面,治疗药物监测应用很少,仅限于高剂量的氨甲喋呤治疗中检测其药物浓度以预示毒性。5-氟尿嘧啶(5-FU)是治疗多种肿瘤的常用药物,大剂量5-FU恒速静脉滴注治疗滋养细胞肿瘤已取得较好的疗效。但目前对5-FU在机体内药代动力学过程认识还很不够,国内外对其临床药动学研究资料差异较大,部分病人因毒副反应和耐药性不能 Therapeutic drug monitoring is an effective monitoring method that has emerged in clinical drug treatment for more than a decade. The routine monitoring of certain drugs abroad has become a part of clinical medical standards. In medical oncology, there are few therapeutic drug monitoring applications and it is limited to the detection of drug concentrations to indicate toxicity in high-dose methotrexate treatment. 5-Fluorouracil (5-FU) is a commonly used drug for the treatment of many kinds of tumors, and high-dose 5-FU constant rate intravenous infusion therapy for trophoblastic tumor has achieved better results. However, the current understanding of the pharmacokinetics of 5-FU in the body is still not enough. The research data on clinical pharmacokinetics at home and abroad are quite different, and some patients are unable to respond to toxicity and drug resistance.