Butterweed, Canada Fleabane, Canadian Horseweed, Canadian-Fleabane, Canadian Trailing Arbutus, Coltstail, Conyza du Canada, Conyza canadensis, Erígero de Canadá, Érigéron du Canada, Erigeron canadensis, Fausse Camomille, Flea Wort, Hierba Carnicera, Hogweed, Horsewood, Oleum Erigerontis, Prideweed, Vergerette du Canada, Vergerolle du Canada.


Overview Information

Canadian fleabane is a plant. The parts that grow above the ground are used for medicine.

People use Canadian fleabane for swelling (inflammation) of the main airways in the lung (bronchitis), sore throat, diarrhea, abnormally heavy bleeding during menstrual periods (menorrhagia), to stop bleeding, and other conditions, but there is no good scientific evidence to support these uses.

How does it work?

There isn't enough information about Canadian fleabane to know how it might work.


Uses & Effectiveness?

Insufficient Evidence for

More evidence is needed to rate the effectiveness of Canadian fleabane for these uses.

Side Effects

Side Effects & Safety

When taken by mouth: Canadian fleabane is POSSIBLY SAFE when used appropriately.

When applied to the skin: There isn't enough reliable information available to know if Canadian fleabane is safe when applied to the skin.

Special Precautions & Warnings:

Pregnancy and breast-feeding: There isn't enough reliable information to know if Canadian fleabane is safe to use when pregnant or breast-feeding. Stay on the safe side and avoid use.

Allergy to ragweed, daisies, and related plants: Canadian fleabane may cause an allergic reaction in people who are sensitive to the Asteraceae/Compositae plant 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 Canadian fleabane.

Surgery: Canadian fleabane can slow blood clotting. There is concern that it might cause extra bleeding during and after surgery. Stop using Canadian fleabane at least 2 weeks before a scheduled surgery.



We currently have no information for CANADIAN FLEABANE Interactions.



The appropriate dose of Canadian fleabane depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for Canadian fleabane. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

View References


  • Olas B, Saluk-Juszczak J, Pawlaczyk I, et al. Antioxidant and antiaggregatory effects of an extract from Conyza canadensis on blood platelets in vitro. Platelets 2006;17(6):354-60. View abstract
  • Saluk-Juszczak J, Olas B, Pawlaczyk I, Gancarz R, Wachowicz B. Effects of the extract from Conyza canadensis on human blood platelet aggregation. Gen Physiol Biophys 2007;26(2):150-2. View abstract.

Vitamins Survey

Have you ever purchased CANADIAN FLEABANE?

Did you or will you purchase this product in-store or online?

Where did you or where do you plan to purchase this product?

Where did you or where do you plan to purchase this product?

What factors influenced or will influence your purchase? (check all that apply)

Vitamins Survey

Where did you or where do you plan to purchase this product?

Do you buy vitamins online or instore?

What factors are most important to you? (check all that apply)

This survey is being conducted by the WebMD marketing sciences department.Read More

More Resources for CANADIAN FLEABANE

CONDITIONS OF USE AND IMPORTANT INFORMATION: This information is meant to supplement, not replace advice from your doctor or healthcare provider and is not meant to cover all possible uses, precautions, interactions or adverse effects. This information may not fit your specific health circumstances. Never delay or disregard seeking professional medical advice from your doctor or other qualified health care provider because of something you have read on WebMD. You should always speak with your doctor or health care professional before you start, stop, or change any prescribed part of your health care plan or treatment and to determine what course of therapy is right for you.

This copyrighted material is provided by Natural Medicines Comprehensive Database Consumer Version. Information from this source is evidence-based and objective, and without commercial influence. For professional medical information on natural medicines, see Natural Medicines Comprehensive Database Professional Version.
© Therapeutic Research Faculty .