A Patient with Depression Tells You She Is Using St

A patient with depression tells you she is using St. John's wort to treat her symptoms because she would rather use a natural product, as she already takes many prescription drugs. What is your best response?

A) "St. John's wort has been proven effective in treating mild to moderate depression."
B) "You may take St. John's wort with your other prescription drugs without concern."
C) "Avoid taking St. John's wort because it interferes with many prescription drugs."
D) "Avoid using St. John's wort unless you have weekly blood levels drawn."