Educational information, not medical advice — ask your doctor or midwife.
Coca is a homeopathic single remedy made from the leaf of the coca plant, Erythroxylum coca. Homeopaths reach for it for altitude sickness (feeling ill high in the mountains), breathlessness on climbs, and deep tiredness. It is sold as small pills, pellets or liquid drops.
The remedy is made by soaking the leaf in alcohol, then watering that liquid down over and over. At 30C, the strength most often sold, none of the leaf is left. What you swallow is sugar or water that once touched the dilution.
Trials have not shown Coca doing more than a dummy pill. It has a long, named place in homeopathy, but long use is not proof that a thing works. We say that once here, and will not repeat it in every section below.
The short answer: there is no known way this remedy could act on the body once it is diluted past 12C, because no leaf is left in it.
Homeopathy runs on an idea called "like cures like". Coca leaf in large amounts can cause a racing heart, a rush of energy and then a crash. So homeopaths give it, heavily watered down, to people with the opposite problem, such as breathlessness and worn-out tiredness at height.
That idea has not been shown to work in fair tests. Any benefit people feel is best explained by the placebo effect (feeling better because you expect to) and by time passing.
Coca is sold in the usual homeopathic forms:
Sugar pills or tiny pellets that you let melt under the tongue. Liquid drops in a water and alcohol base. Common strengths are 6C, 30C and 200C, and sometimes 6X or 30X.
A mother tincture (the first, undiluted leaf extract) also exists. It is not a homeopathic dilution, it can hold real leaf chemicals, and it is illegal to hold or sell in many countries.
Andean peoples have chewed coca leaf for thousands of years for hunger, cold, tiredness and thin mountain air. That use is old and deeply rooted, and it is a food-and-custom use, not a homeopathic one.
Coca entered homeopathy in the 1800s. Homeopaths took the leaf, tested it on healthy people, and wrote up what it caused. Those notes became the remedy picture still printed in homeopathic reference books today.
See a doctor straight away if you are high in the mountains and have a bad headache, keep being sick, feel confused, lose your balance, or cough up frothy spit. These are signs of dangerous altitude sickness, and you need to go down at once. Also get help if your heart races or beats oddly, if your chest hurts, if you have a fit, or if breathlessness is new or getting worse. Call a doctor before using any homeopathic remedy alongside heart, blood pressure or mood medicine.
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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