Popular herbal and dietary supplements can interact with anticancer and other medications and alter the way they work in the body, making the drugs either more or less effective, or increasing certain side effects.
"The supplement could stimulate the liver to metabolize the medication more effectively so you would end up with inappropriate low levels and risk the formation of a serious side effect," or conversely, the supplement could increase the medication effect. Neither is good."
To find out more about how the supplements you're taking interact with drugs, use:
DRUG INTERACTION CHECKER