Side Effects and Cautions

• No serious side effects have been reported for feverfew. Side effects can include canker sores, swelling and irritation of the lips and tongue, and loss of taste.
• Less common side effects can include nausea, digestive problems, and bloating.
• People who take feverfew for a long time and then stop taking it may have headaches, nervousness, difficulty sleeping, stiff muscles, and joint pain.
• Women who are pregnant should not use feverfew because it may cause the uterus to contract, increasing the risk of miscarriage or premature delivery.
• People can have allergic reactions to feverfew. Those who are allergic to other members of the daisy family (which includes ragweed and chrysanthemums) are more likely to be allergic to feverfew.
• Tell your health care providers about any complementary and alternative practices you use. Give them a full picture of what you do to manage your health. This will help ensure coordinated and safe care.