Digoxin toxicity in a 26-year-old woman taking a herbal dietary supplement

Herbal dietary supplements are often considered by patients to be safe and free from side effects. The case described here shows digoxin toxicity in a patient taking a dietary supplement not normally considered to contain digoxin. In addition to highlighting the risks of herbal supplements, this case also demonstrates the concept that digoxin equivalents are not picked up by the standard digoxin assay.