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Burdock may cause an allergic reaction in people sensitive to certain flowers and herbs. When applied to the skin, it can cause a rash.
Special Precautions & Warnings:Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking burdock if you are pregnant or breast feeding. Stay on the safe side and avoid use.
Bleeding disorders: Burdock might slow blood clotting. Taking burdock might increase the risk of bleeding in people with bleeding disorders.
Allergy to ragweed and related plants: Burdock may cause an allergic reaction in people who are sensitive to the Asteraceae/Compositae family. Members of this family include ragweed, chrysanthemums, marigolds, daisies, and many others. If you have allergies, be sure to check with your healthcare provider before taking burdock.
Diabetes: Some evidence suggests that taking burdock might lower blood sugar levels. Taking burdock might lower blood sugar levels too much in people with diabetes who are already taking medications to lower blood sugar.
Surgery: Burdock might increase the risk of bleeding during and after surgery. Stop taking it at least 2 weeks before a scheduled surgery.
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.