Echinacea purpurea, E. angustifolia, E. pallida. Family: Asteraceae
black sampson, purple coneflower, rudbeckia, sampson root
Echinacea is a flowering plant. It comes from North America. It’s also known as purple
coneflower. The plant is harvested at flowering time. The roots and aboveground parts
of the plant are used.
Echinacea refers to a mix of 2 plants that have pharmacological effects. They include
E. angustifolia and E. purpurea. A broad spectrum of chemical compounds in the plants
stimulates the immune system. These compounds include caffeic acid glycoside and chicoric
acid. It also has anti-inflammatory effects.
Medically valid uses
There are no quality studies that support the use of echinacea for upper respiratory
infections. Many studies have shown that it doesn’t help prevent or treat a cold.
Other studies have shown only a small benefit. For instance, some studies showed it
decreased how long cold symptoms lasted by a half day.
Some studies have shown that taking it by mouth with a topical antifungal cream helps
prevent recurrent vaginal yeast infections. This combination may lower the recurrence
rate to 16.7%. This is compared with 60.5% with an antifungal cream alone.
There may be benefits that have not yet been proven through research.
American Indians used the leaves and roots of the plant to treat many issues. These
include toothaches, snakebites, insect bites, and other skin wounds.
Many people say it prevents and treats upper respiratory infections. It’s also said
to aid in wound healing.
Echinacea has also been used as an anti-inflammatory and anti-microbial agent. This
means it helps the body destroy or resist germs that cause illness. It’s also been
used to treat fever, colic, coughs, and bronchitis. It may also treat urinary tract
infections, sore throats, and the flu.
Echinacea comes in many forms. These include fresh, freeze-dried, dried, alcohol-based
extract, liquid, tincture, tea, capsules, and salve.
Side effects, toxicity, and interactions
Echinacea can cause side effects. These include fever, nausea, and vomiting.
Echinacea isn’t safe for everyone. Some people shouldn’t use it. This includes people
Are pregnant or breastfeeding
Have a progressive systemic disease, such as tuberculosis, lupus, rheumatoid arthritis, or
Have HIV or AIDS
Are allergic to plants in the sunflower or daisy family
Are undergoing therapy for cancer
Have recently had eye surgery or have a history of dry eye
Are taking immunosuppressant medicines
There are no known food or medicine interactions linked with echinacea.