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nausea and vomiting. Long-term use can cause vision changes and blindness. In very large doses, it could cause abnormal heart function.
It is not known if quassia is safe for use on the skin (including the scalp) or rectally.
Do not take quassia 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.