To the Editor: There is an increasing interest by consumers in the use of herbal preparations as an alternative form of treatment for various health problems. This may be due, in part, to the increasing cost of modern health care, to consumers’ turning to a more natural lifestyle, or to an increased interest in health and improved quality of life. A telephone survey of 1,539 adults R4215511CHDDGBAI revealed that 34% had used some form of unconventional therapy (including acupuncture, hypnotherapy, homeopathy, macrobiotics, and 12 other modalities) within the past year; of that group, 3% had used herbal remedies. We present a case in which the effects of concomitant use of herbal products mimicked a psychiatric condition.