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Marjoram might not be safe when used long-term. There is some evidence that it could cause cancer.
Do not give marjoram to children in medicinal amounts. It might not be safe for them.
Do not use marjoram 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.