Educational information, not medical advice — ask your doctor or midwife.
Chaparro amargoso is a homeopathic remedy. It is made from a bitter desert shrub. The Latin name of the plant is Castela nicholsoni.
People take it for an upset gut. The main use is loose, watery stools. Some also take it for belly cramps or a poor appetite.
The plant is diluted again and again to make the remedy. At 30C, no plant matter is left in the pill.
Trials do not show that it works better than a dummy pill. The plant does have a long folk record in Mexico. Long use on its own is not proof of effect, and we say that here once rather than in each part below.
Homeopathy has its own idea of how remedies act. It holds that a tiny dose of a substance can treat the signs that a large dose would cause. Makers say that shaking and diluting leaves a trace of the plant behind in the water.
No known body process fits this idea. At 30C the pill holds sugar, not plant.
So any change you feel is most likely a placebo effect. That means you feel better because you expect to feel better.
Most people buy small sugar pellets. Liquid drops in water and alcohol are also sold.
Both forms carry a potency label, such as 6C, 12C or 30C. The number tells you how many times the plant was diluted. A higher number means more dilution, not more plant.
Mother tincture is a fourth form. It is marked with the symbol O with a line through it. It is barely diluted, so it does still hold plant matter and tastes very bitter.
The shrub grows in northern Mexico and south Texas. Folk healers there brewed a bitter tea from its bark and twigs. They used it for gut infections, above all for amoebic dysentery (a gut infection caused by a tiny parasite).
Some homeopathic writers in the United States picked it up in the late 1800s. It never became a common remedy. Today it is a minor entry in homeopathic lists.
See a doctor if your loose stools last more than 2 days, or if they keep coming back.
Go the same day, or call for urgent help, if you notice any of these: blood or black colour in your stool, a fever over 38C (100.4F), severe belly pain, or vomiting that stops you keeping fluids down.
Also get seen if you feel dizzy, pass very little urine, or have a dry mouth, as these are signs of losing too much body fluid. Tell the doctor if you have been abroad in the last month, and bring the pack with you.
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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