Educational information, not medical advice — ask your doctor or midwife.
Erigeron canadensis is a homeopathic remedy. It is made from a common roadside weed called Canadian fleabane. Its other Latin name is Conyza canadensis.
It is sold as a single remedy, not a blend. In homeopathy books it is linked to bleeding of many kinds. That includes nosebleeds, heavy periods, blood in the urine, and watery diarrhoea.
The remedy is made by diluting the plant over and over again. At 30C, almost none of the plant is left. Trials have not shown it to work better than a dummy pill.
So you have two separate things here. The plant has a real folk record in North America. That long use is not proof that the remedy works.
There is no known way for this remedy to act on the body once it is diluted.
Homeopathy is built on one idea: a tiny dose of a plant can treat the same signs that a large dose causes. This is called "like cures like". Big doses of fleabane were said to irritate the gut and the urine tract, so tiny doses were given for bleeding and loose stools.
The remedy is shaken and diluted again and again. Past about 12C, no molecules of the plant remain. What you swallow is water, alcohol, or a sugar pellet.
So any change you notice is most likely a placebo effect. That means feeling better because you expect to, not because of the plant.
You will find it as small sugar pellets, as liquid drops in alcohol, and as a mother tincture.
Common strengths on the label are 3X, 6C, 30C and 200C. A higher number means more diluting, not more plant. So 200C holds less plant than 6C, not more.
The mother tincture is the strongest form and the only one with a real dose of the herb. It is also the one most likely to upset your stomach, because it is largely alcohol.
Canadian fleabane grows wild across North America and has now spread worldwide. Native American groups and later settlers used the fresh plant for bleeding, loose stools and sore bladders.
American doctors of the 1800s carried that use into their books. Homeopathy picked the plant up in the same era and gave it the same job: bleeding with bright red blood.
It has stayed a minor remedy. You will not find it in most home kits, and it is far less used than staples such as Arnica.
Some reactions to Erigeron canadensis need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Get emergency help now if bleeding is heavy, will not stop, or comes with dizziness, fainting, a racing heart or cold clammy skin.
See a doctor the same day for a nosebleed lasting over 20 minutes, blood in your urine or stool, bleeding during pregnancy, or any bleeding while you take a blood thinner.
Book a normal appointment if your periods are getting heavier, if you feel tired and short of breath, or if diarrhoea lasts more than three days. Stop the remedy and get checked if nothing improves in three days.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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