Potentiation of warfarin by dong quai

被引:111
作者
Page, RL
Lawrence, JD
机构
[1] Univ Colorado, Hlth Sci Ctr, Dept Pharm Practice, Sch Pharm, Denver, CO 80262 USA
[2] McClennan Banks Ambulatory Care Ctr, Dept Pharm Serv, Charleston, SC USA
[3] Med Univ S Carolina, Charleston, SC 29425 USA
来源
PHARMACOTHERAPY | 1999年 / 19卷 / 07期
关键词
D O I
10.1592/phco.19.10.870.31558
中图分类号
R9 [药学];
学科分类号
1007 ;
摘要
Dong quai is a Chinese herbal supplement touted for treatment of menstrual cramping, irregular menses, and menopausal symptoms. Phytochemical analyses found it to consist of natural coumarin derivatives, as well as constituents possessing antithrombotic, antiarrhythmic, phototoxic, and carcinogenic effects. A 46-year-old African-American woman with atrial fibrillation stabilized on warfarin experienced a greater than 2-fold elevation in prothrombin time and international normalized ratio after taking dong quai concurrently for 4 weeks. No identifiable cause was ascertained for the increase except dong quai. The patient's coagulation values returned to acceptable levels 1 month after discontinuing the herb. One animal study suggests a pharmacodynamic interaction between the product and warfarin, but the true mechanism remains unknown. Practitioners should be aware of the possibility of such an interaction and should inform patients of potential hazards of taking the two together.
引用
收藏
页码:870 / 876
页数:7
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