Certain drugs and nutrients may interact and in effect, reduce the strength of the drug--and the nutrient itself. In general, herbs should not be taken with prescription drugs without the supervision of a health care professional. Herbs have been used for supporting health for literally thousands of years. However, herbs are complex compounds containing dozens of different chemicals. When combined with very powerful pharmaceutical drugs, there is always the possibility of an effect other than what is desired. For this reason it's always important to discuss with your health care professional all the different vitamins, minerals, herbs, and especially drugs (prescription and over-the-counter) you're taking.