Keywords: coneflower, American coneflower, cold, flu
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Photography by Robert E. Lyons
This fact sheet provides basic information about the herb. A plant or part of a plant used for its flavor, scent,
or potential therapeutic properties. Includes flowers, leaves, bark, fruit, seeds, stems, and roots.
echinacea—common names, uses, potential side effects, and resources for more information. There
are nine known species of echinacea, all of which are native to the United States and southern
Canada. The most commonly used, Echinacea purpurea, is believed to be the most potent.
Common Names—echinacea, purple coneflower, coneflower, American coneflower
Latin Names—Echinacea purpurea, Echinacea angustifolia, Echinacea pallida
What It Is Used For
- Echinacea has traditionally been used to treat or prevent colds, flu, and other
- Echinacea is believed to stimulate the immune system to help fight infections.
- Less commonly, echinacea has been used for wounds and skin problems, such as acne or boils.
How It Is Used
The aboveground parts of the plant and roots of echinacea are used fresh or dried to make teas, squeezed
(expressed) juice, extracts, or preparations for external use.
What the Science Says
- Study results are mixed on whether echinacea effectively treats colds or flu. For example, two NCCAM-funded
studies did not find a benefit from echinacea, either as Echinacea purpurea fresh-pressed juice for treating
colds in children, or as an unrefined mixture of Echinacea angustifolia root and Echinacea purpurea root and
herb in adults. However, other studies have shown that echinacea may be beneficial in treating upper
- Most studies to date indicate that echinacea does not appear to prevent colds or other infections.
- NCCAM is continuing to support the study of echinacea for the treatment of upper respiratory infections.
NCCAM is also studying echinacea for its potential effects on the immune system.
Side Effects and Cautions
- When taken by mouth, echinacea usually does not cause side effects. However, some people experience
allergic reactions, including rashes, increased asthma, and anaphylaxis (a life-threatening allergic reaction).
In clinical trials, gastrointestinal side effects were most common.
- People are more likely to experience allergic reactions to echinacea if they are allergic to related plants
in the daisy family, which includes ragweed, chrysanthemums, marigolds, and daisies. Also, people with asthma
or atopy (a genetic tendency toward allergic reactions) may be more likely to have an allergic reaction when
- 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.
- Barrett BP, Brown RL, Locken K, et
Treatment of the common cold with unrefined echinacea: a
randomized, double-blind, placebo-controlled trial. Annals of Internal
- Echinacea. Natural Medicines Comprehensive
Database Web site. Accessed June 29,
- Echinacea (E. angustifolia DC, E. pallida, E. purpurea). Natural Standard Database Web site. Accessed June 28, 2007.
- Echinacea. In: Blumenthal M, Goldberg A,
Brinckman J, eds. Herbal Medicine: Expanded Commission E
Monographs. Newton, MA: Lippincott Williams & Wilkins;
- Fugh-Berman A. Echinacea for the prevention
and treatment of upper respiratory infections. Seminars in
Integrative Medicine. 2003;1(2):106–111.
- Taylor JA, Weber W, Standish L, et
Efficacy and safety of echinacea in treating upper respiratory
tract infections in children: a randomized controlled trial. Journal of the American Medical