Echinacea is a flowering plant that is used medicinally as an herbal supplement. There are actually several different species, all of which are native to North America
(see Echinacea Species). Most often, people use the herb for preventing or
treating the common cold or
the flu, although people use it for other uses as well.
As a plant, echinacea contains many different compounds. The different species may vary slightly in the composition of such compounds. At this time, it is not clear which compounds (or combination of compounds) might be responsible for the medicinal actions of the herb.
Some studies suggest that the supplement might work by stimulating the immune system (in several different ways), although one study demonstrated that it did not stimulate the immune systems of healthy individuals. It is also thought that echinacea might work for the
common cold or the flu due to its anti-inflammatory effects.
A few different compounds in echinacea might have antifungal activity, which may be why the herb may help with
yeast infections.
There is some evidence that echinacea may be effective for treating the
common cold and for preventing the recurrence of chronic vaginal
yeast infections. It is not clear if the herb is effective for other uses.
There is no established standard dosage for this supplement. Different products recommend different dosages, and even the dosages used in clinical studies have varied widely.
Potential Side Effects of Echinacea
Just like conventional medications, natural products can cause side effects. However, echinacea is usually well tolerated by most people, although some side effects may occur. Some of the reported side effects include but are not limited to:
(Click Echinacea Side Effects to learn more, including potentially serious side effects you should report immediately to your healthcare provider.)
Safety Warnings and Precautions With Echinacea
Reasonable usage of echinacea, at reasonable doses, is probably safe for many people. However, some people may be more likely to experience problems due to supplements. Therefore, you should talk with your healthcare provider prior to taking this product medicinally if you have:
- An autoimmune disorder, such as:
- Any allergies, including allergies to foods, dyes, or preservatives.
Also, let your healthcare provider know if you are:
Make sure to tell your healthcare provider about all other medicines you are taking, including prescription and non-prescription medicines, vitamins, and herbal supplements.
(Click Is Echinacea Safe? for more information, including any available warnings and precautions.)
What If I Take an Overdose?
It is not known exactly what to expect from an overdose of this supplement. If you think you or someone else may have taken too much echinacea, it is important to seek immediate medical attention.
How Should Echinacea Be Stored?
Refer to the label of your individual product for information on how to best store the supplements. Keep this and all medications and supplements out of the reach of children.
