Educational information, not medical advice — ask your doctor or midwife.
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Corallium rubrum is a homeopathic remedy made from red coral. It is a single remedy, made from one source, not a blend. Homeopaths reach for it most often for hard, dry coughing fits that come in fast bursts.
The coral is ground up first. Then it is watered down again and again in steps. At 30C, almost none of the coral is left in the pill or the drops.
So what you take is mostly sugar or water, and trials have not shown it beats a dummy pill. A long history of use is not proof that something works. That holds true for every claim on this page.
People use it for short-term coughs and colds at home. It is not a treatment for a chest infection, asthma or whooping cough. If you or your child is truly unwell, you need a doctor, not a sugar pellet.
The honest answer is that no one has shown a way for this remedy to work as a drug.
Homeopathy rests on two old ideas. The first is 'like cures like': a substance that causes signs in a well person is said to treat those same signs in a sick one. The second is that shaking and watering a substance down makes it act more strongly.
Both ideas clash with what we know about chemistry. At 30C the coral has been thinned out past the point where any of it can be left. There is no accepted way for plain water or sugar to carry an effect from it.
People do often feel better after a dose. Time, rest, care and belief all play a part. Good trials are built to tell those things apart from the remedy itself, and so far they point to placebo (a dummy treatment).
You will most often see small sugar pellets that melt under the tongue.
Other forms include liquid drops made with water and alcohol, a powder ground with lactose (milk sugar), and plain tablets.
Strengths are written as 6C, 30C or 200C, or as 3X and 6X. The letters tell you how many times the coral was watered down and by how much. 30C is the strength most often sold in shops.
Pick pellets if you avoid alcohol. Ask for a lactose-free form if milk sugar upsets you.
Red coral has been prized for hundreds of years. It was worn as a charm and ground up as medicine in Europe, India and the Middle East.
Homeopathy took it up in the 1800s. Early homeopaths gave it to healthy people and wrote down what they felt. That is where the link with sharp, rapid coughing fits comes from.
Old homeopathic books also listed it for sores tied to syphilis (an infection spread by sex). That use is out of date and unsafe. Syphilis needs antibiotics (medicines that kill bacteria) from a doctor.
In Ayurveda, red coral is burned and worked into praval bhasma. That is a different medicine made a different way, and nothing here applies to it.
Book a doctor's appointment if a cough lasts more than three weeks, if you keep getting fevers, if you are losing weight without trying, or if your voice stays hoarse.
Get help the same day if you have a high fever, you feel very unwell, or a child under two has a barking or whooping cough.
Call emergency services if lips or face turn blue or grey, if breathing is hard or very fast, if you cough up blood, or if someone stops breathing during a coughing fit.
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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