Educational information, not medical advice — ask your doctor or midwife.
Cuprum arsenicosum is a single homeopathic remedy. Its Latin name is Cupri arsenis. It is also known as copper arsenite, or Scheele's green, an old green paint colour.
Homeopaths give it for cramping belly pain, watery stools with cramps, sick feelings, and muscle cramps. It is a minor remedy, not a first-choice one.
The raw salt is a poison. It holds copper and arsenic. The remedy is watered down again and again, so a 30C pill holds none of the start material.
Traditional use is not proof that a thing works. Trials do not show homeopathic pills doing better than dummy pills. This page reports both axes side by side.
Homeopathy rests on two ideas. The first is "like cures like": a thing that causes a symptom is said to treat it. The second is that shaking each step of the dilution leaves a trace of the first substance behind.
There is no known way for that to happen. Water does not keep a record of what was once in it.
When homeopathic pills are tested against dummy pills, they do not do better. So any change you feel is best put down to placebo (a dummy-pill effect), time, and rest.
You will find it as small sugar pills, tiny round granules, or liquid drops in alcohol. Some brands sell a soft tablet that melts on the tongue.
Common strengths are 6C, 30C, and 200C. The 30C is the one most shops stock.
Low strengths such as 3X and 6X are sold too. These may still hold real arsenic, so leave them alone.
Copper arsenite was made in 1775 by a Swedish chemist, Carl Scheele. It was sold as a bright green paint called Scheele's green. It also made people ill in rooms where that paint was used.
Homeopaths wrote it into their books in the 1800s. They used it for cholera-like watery stools with hard cramps.
It has stayed a small, less-used remedy within one tradition. That is why its traditional tier is T1.
Some reactions to Cuprum arsenicosum need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
See a doctor the same day if watery stools last more than two days, or if you cannot keep fluids down. Go sooner for a baby, an older person, or anyone with a long-term illness.
Get urgent help for blood in the stool, black stools, a stiff or very painful belly, a high fever, or signs of losing too much body water.
Call emergency services for chest pain, trouble breathing, fits, or a fast or odd heartbeat. If you or a child swallowed a low-potency product and feel a burning throat, vomiting, or cramps, call a poison centre right away.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
Reviewed by the HealisticMD editorial team How we grade evidence →
The published evidence for Cuprum arsenicosum is weak or absent. That usually means no controlled trial has tested it, not that a trial found it ineffective — the two are different, and we grade only what has been published.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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