A Client Reports Taking St

A client reports taking St.John's wort for depression.The client states,"I'm taking the recommended dose,but it seems like if two capsules are good,four would be better!" Which is the most appropriate nursing reply?

A) "Herbal medicines are more likely to cause adverse reactions than are prescription medications."
B) "Increasing the amount of herbal preparations can lead to overdose and toxicity."
C) "The U.S.Food and Drug Administration (FDA) does not regulate herbal remedies;therefore,ingredients are often unknown."
D) "Certain companies are better than others.Always buy a reputable brand."