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heartburn, diarrhea, constipation, bloating, flatulence, nausea, and vomiting. Other reported side effects include nervousness, dizziness, headache, insomnia, joint stiffness, tiredness, menstrual changes, rash, palpitations, and weight gain.
The safety of feverfew beyond 4-months' use has not been studied.
Feverfew can also cause allergic reactions, especially in people who are allergic to ragweed, mums, marigolds, or daisies. If you have allergies, be sure to check with your healthcare provider before taking feverfew.
Some people chew feverfew instead of swallowing it in a pill. Chewing fresh feverfew leaves can cause mouth sores; swelling of the mouth, tongue, and lips; and loss of taste.
Do not take feverfew 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.
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