Fig. 2.

INR vs warfarin dose (mg) for three patients before and during treatment with Gouqizi (6 g/day) for 3 days. A starting INR was taken before taking Gouqizi on 15 January 2015 (the INR of patient 1 is 2.36, the INR of patient 2 is 2.32, the INR of patient 3 is 2.33), and then Gouqizi (6 g) tea was administered in the evening for three consecutive days (15–17 January 2015), then the INR was taken in the fourth day (18 January 2015, he INR of patient 1 is 2.23, the INR of patient 2 is 2.37, the INR of patient 3 is 2.41).