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diarrhea, headache, stomach pain, and confusion.
When applied directly to the skin wintergreen oil can cause skin irritation.
Wintergreen leaf and oil can be poisonous for children.
Do not use wintergreen leaf if:
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.