In response to the widespread use of botanical therapies in the United States, Medical Economics Co has published a new Physicians' Desk Reference for Herbal Medicines.
This latest PDR provides details on more than 600 herbal medications. Because herbal products are not subject to the same safety and efficacy testing that the Food and Drug Administration requires for prescription drugs, health care professionals often have little, if any, information on which to base their recommendations about herbal medicine.
Voelker R. Herbal PDR. JAMA. 1999;281(4):314. doi:10.1001/jama.281.4.314-JQU80010-2-1