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Echinacea
Echinacea — what the European monograph actually supports, what it is not for, the form and how long it is meant to be used, side effects, and the 1 medicine interaction documented for it.
This is a reference page, not a diagnosis and not a prescription. Herbal products are real pharmacology: they have effects, side effects and interactions with medicines. Tell your doctor and your pharmacist everything you take, including teas and supplements, and never stop or change a prescribed medicine because of anything you read here.
What it is
Echinacea purpurea (L.) Moench — herb and root (Echinaceae purpureae herba, Echinaceae purpureae radix)
Local names across the region this site serves: siilkübar (ET) · punahattu (FI) · эхинацея (RU).
Grouped here under Colds, cough and throat. Regulatory position: EU herbal monograph — traditional use.
What the evidence supports
The registered indication: Short-term prevention and treatment of the common cold.
The best-selling cold herb in the Nordics and Baltics, and the one whose evidence has been argued over for thirty years without resolution. Part of the reason is that echinacea is not one thing: three species are used (E. purpurea, E. angustifolia, E. pallida), root and aerial parts have different chemistry, and pressed juice, tincture and dried extract are three different preparations. Systematic reviews land somewhere around a small possible effect on how often colds occur and an unclear effect on how long they last; NCCIH's summary of the research says the evidence is not strong. The monograph is clear about one thing that matters practically: this is for short-term use started at the first signs, not a tonic taken all winter.
C — Traditional use only Plausible from thirty or more years of use, which is what a traditional-use registration means. No clinical evidence was required and none has settled it.
What it is not for
Influenza, pneumonia, sinus infection or any illness with high fever and breathlessness. A cold that gets worse after a week, rather than better, is a reason to be seen.
Form, strength and how long
Expressed juice of fresh flowering herb, tinctures, dried extracts and lozenges. Products differ so much that experience with one says little about another.
Duration. Short courses, typically up to about ten days. The monographs do not support continuous seasonal use.
No gram figure appears on this page on purpose. The plant part, the extraction solvent and the drug-to-extract ratio together define a preparation, and a number taken from one does not describe another. The reasoning is set out on the hub; the amount that applies to you is the one printed on the pack you are holding, and a pharmacist will read it with you.
Side effects
Allergic reactions are the notable ones — rash, itching, and rarely severe reactions — and they are more likely in people with existing allergies or asthma. Daisy-family (Asteraceae) sensitivity is the relevant cross-reaction. Stomach upset and a tingling tongue from tinctures.
Who should avoid it
Monograph texts contraindicate it in progressive systemic disorders including tuberculosis, sarcoidosis, autoimmune diseases, multiple sclerosis and HIV infection, and in people taking immunosuppressants, because it is presented as immune-stimulating. Most preparations are not for children under 12. Not established in pregnancy.
Interactions with medicines
| Medicine or substance | What is described |
|---|---|
| Immunosuppressants and transplant medicines | Echinacea is sold as an immune stimulant while transplant and autoimmune medicines work by suppressing immunity. The two are pulling in opposite directions, and the monograph contraindication reflects that rather than a measured drug level. |
The reverse view — start from the medicine rather than the plant — is in the medicine, food and alcohol interactions reference, and summarised for every herb on this site.
Sources: European Medicines Agency — Committee on Herbal Medicinal Products (HMPC), European Union herbal monographs · NIH National Center for Complementary and Integrative Health — herb fact sheets · checked 2026-09-06
Frequently asked questions
What is echinacea used for?
Short-term prevention and treatment of the common cold. The best-selling cold herb in the Nordics and Baltics, and the one whose evidence has been argued over for thirty years without resolution. Part of the reason is that echinacea is not one thing: three species are used (E. purpurea, E. angustifolia, E. pallida), root and aerial parts have different chemistry, and pressed juice, tincture and dried extract are three different preparations. Systematic reviews land somewhere around a small possible effect on how often colds occur and an unclear effect on how long they last; NCCIH's summary of the research says the evidence is not strong. The monograph is clear about one thing that matters practically: this is for short-term use started at the first signs, not a tonic taken all winter.
Does echinacea work?
Graded C here: Plausible from thirty or more years of use, which is what a traditional-use registration means. No clinical evidence was required and none has settled it. Influenza, pneumonia, sinus infection or any illness with high fever and breathlessness. A cold that gets worse after a week, rather than better, is a reason to be seen.
How much echinacea should I take?
This reference does not print gram figures, because they do not transfer between preparations of different extract strength. What can be said honestly is the form and the duration: Expressed juice of fresh flowering herb, tinctures, dried extracts and lozenges. Products differ so much that experience with one says little about another. Short courses, typically up to about ten days. The monographs do not support continuous seasonal use.
What are the side effects of echinacea?
Allergic reactions are the notable ones — rash, itching, and rarely severe reactions — and they are more likely in people with existing allergies or asthma. Daisy-family (Asteraceae) sensitivity is the relevant cross-reaction. Stomach upset and a tingling tongue from tinctures.
Does echinacea interact with medicines?
Yes — documented for Immunosuppressants. Each one is described on this page, with a link to the medicine-side reference where one exists.
Others in colds, cough and throat
Elder / elderberry
Relief of early symptoms of the common cold, for elderflower preparations.
Thyme
As an expectorant in cough associated with a cold.
Sage
As a gargle or mouth rinse for minor inflammations of the mouth and throat; orally for mild dyspepsia and for excessive sweating.
Keep the whole list in one place
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