Test tube and animal studies suggest that quercetin may enhance the effects of doxorubicin and cisplatin, which are two chemotherapy medications used to treat cancer. In addition, some doctors believe taking antioxidants at the same time as chemotherapy can be harmful, while others believe it can be helpful. In one study, combining quercetin with the anti-tumor drug doxorubicin, increased the drug's beneficial effects on breast cancer cells. In another, taking quercetin alongside cisplatin reduced the medicines' therapeutic effects in ovarian cancer cells. Talk to your oncologist before taking any supplements if you are undergoing chemotherapy.
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