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Some people turn to alternative medicine, including certain medicinal herbs (see Medicinal Herbs and Nutraceuticals: Introduction), to treat their cancer, instead of or in addition to standard treatment. However, most types of alternative medicine have not been subjected to careful scientific studies. Thus, very little is known about the effectiveness of alternative medicine in treating cancer.

Although benefits of alternative medicine for cancer have not been scientifically proven, there is significant potential for harm because

• The alternative medicine may be toxic
• The alternative medicine may interact with standard treatment, such as chemotherapy, thus reducing its effectiveness
• The alternative medicine may be costly, reducing the person's ability to afford standard treatment
• If alternative medicine is used instead of standard treatment, the person will not obtain the proven benefits of standard treatment

People using alternative medicine should inform their doctor. Hiding the use of alternative medicine could be harmful.

Last full review/revision August 2007 by Bruce A. Chabner, MD; Elizabeth Chabner Thompson, MD, MPH