What it is
The best-studied preparations come from the aerial part of Echinacea purpurea, especially its pressed juice. The European monograph recognises them for the short-term prevention and treatment of the common cold. Trials give mixed results: at best, a modest effect on the duration or severity of symptoms.
What matters at the counter are its limits: no more than ten days in a row, not in young children, and not in autoimmune diseases or a weakened immune system. And never as an alternative to a prescribed antibiotic: a cold is viral, and a bacterial infection is not treated with echinacea.
How it works
What is known:
- Its components (alkylamides, polysaccharides) modulate the immune response in experimental studies
- In people, the benefit for colds is small and inconsistent between trials
- Because it acts on the immune system, it is contraindicated in diseases that affect it
At the counter
When to recommend it
- Early symptoms of a common cold, in adults
- People who want to try a herbal option knowing the expected effect is modest
- Short use, for a few days
- No allergy to the daisy family
When not to
- Autoimmune diseases, HIV, tuberculosis, leukaemias or immunosuppressive treatment
- Allergy to the daisy family (daisy, chamomile, ragweed)
- Children under 12
- High fever, difficulty breathing or worsening symptoms: not a counter cold
Warnings
- Important Contraindicated in autoimmune diseases, HIV, tuberculosis, leukaemias and with immunosuppressive treatment.
- Important Daisy-family allergy: risk of reactions, including severe ones.
- Caution Do not use for more than ten days in a row.
- Caution Not recommended under 12, or in pregnancy or breastfeeding.
- Worth knowing Its effect on colds is modest at best.
How it is used
- Start it at the first sign of a cold.
- Use it for ten days in a row at most.
- If there is no improvement after ten days, or there is a high fever, it needs a consultation.
- Not recommended under 12.
What is claimed vs what the evidence says
| Aspect | What is claimed | What the evidence says |
|---|---|---|
| Boosts immunity | All winter long | Short use, ten days at most |
| Effect on colds | Stops them | Modest and inconsistent |
| With an antibiotic | Makes it work better | Not its role; colds are viral |
| Safety | Natural, no risks | Contraindicated in autoimmune disease and immunosuppression |
| Children | Ideal for school | Not recommended under 12 |
A short course at the start of a cold, in adults with no contraindications. No more.
Self-assessment
Three questions. When you check your answers you will see the explanation for each one.
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The monograph limits it to short use. It is not a "booster" for the whole season.
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It acts on the immune system: it is contraindicated in autoimmune disease, HIV, tuberculosis, leukaemias and immunosuppression.
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Echinacea does not treat bacterial infections. The prescribed antibiotic is completed as directed.
Training content. It does not replace the summary of product characteristics or clinical judgement.