Allium cepa is a homeopathic remedy prepared from the common red onion. In homeopathic practice it is traditionally associated with streaming head colds and hay fever — the kind with a burning, watery nose, bland tears and bouts of sneezing that ease in fresh, open air.
This page explains where Allium cepa comes from, the classic complaints it is linked with, the symptom picture practitioners look for, and the forms and potencies it is usually found in.
The short version: Allium cepa is the onion remedy people reach for when a cold or hay fever brings a streaming, burning nose and bland, watery eyes.
What is Allium cepa and where does it come from?
Allium cepa is made from the ordinary culinary red onion, Allium cepa. Anyone who has chopped an onion knows the effect it has: a runny nose and eyes that stream. Homeopathy works on the principle of ‘like treats like’, so a substance that produces streaming eyes and nose in a healthy person is traditionally used, in potentised micro-dose form, for complaints with those same features. The fresh bulb is macerated and serially diluted to make the remedy.
What is Allium cepa traditionally used for?
In homeopathic tradition, Allium cepa is one of the best-known acute remedies for coryza and seasonal complaints. People reach for it when:
- Colds with a streaming, acrid nose — the nasal discharge feels burning and reddens the upper lip, while the tears stay bland.
- Hay fever and allergic rhinitis with violent sneezing and a tickle at the nose.
- Watery, sensitive eyes that stream but do not burn.
- A raw, tickly larynx with a cough that feels as if the throat will tear.
- Neuralgic, thread-like pains that come and go, sometimes after a chill.
Who typically reaches for Allium cepa?
The characteristic picture is easy to spot: the nose runs like a tap with a discharge that stings, yet the eyes water without soreness — the reverse of the Euphrasia picture, where the eyes burn and the nose stays bland. Symptoms are classically worse in a warm room and in the evening, and noticeably better in open, cool air. It suits the early, watery stage of a cold caught after exposure to damp, cold winds.
Your natural toolkit — and which to reach for
You will find onion-family and seasonal support in remedies such as those in our library. One option people explore is below.
Tegor Vitallium- 30 Tablets — reach for this if you want a gentle everyday support option to keep alongside your seasonal self-care.
Featured products
Tegor Vitallium- 30 Tablets
A convenient tablet option to keep in the cupboard for everyday support.
Explore the full United Remedies range — blending homeopathy from Heel, Guna and Sanum with Weleda’s plant-based topicals and Zooki’s liposomal supplements.
Common questions
What is Allium cepa best known for in homeopathy?
It is best known as a traditional remedy for streaming head colds and hay fever, especially when the nose runs with a burning discharge while the eyes water without soreness.
How is Allium cepa usually taken?
It is commonly used in low potencies such as 6C or 30C. Always follow the directions on the pack or the guidance of a qualified homeopath.
How is it different from Euphrasia?
The pictures are mirror images: with Allium cepa the nasal discharge burns and the tears are bland, whereas with Euphrasia the eyes burn and the nasal discharge is bland.
Note: This page is for general education and is not medical advice. Homeopathic remedies are used within a tradition of self-care and are not a substitute for professional diagnosis or treatment. If symptoms are severe, persistent or worsening, please speak to a qualified health professional.