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nausea, vomiting, diarrhea, decreased heart rate, hallucinations, and heart problems in some people. Also, one of the chemicals in American mistletoe seems to be similar to poisons in cobra venom. This chemical can cause "cardiac arrest," a condition in which the heart suddenly stops beating.
Special Precautions & Warnings:Pregnancy and breast-feeding: It is LIKELY UNSAFE to use American mistletoe during pregnancy or breast-feeding. Don't use it.
Heart disease: American mistletoe might make heart disease worse. Don't use it.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.