Educational information, not medical advice — ask your doctor or midwife.
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Acidum chromicum is a single remedy used in homeopathy. It is also called chromic acid. Homeopaths give it for thick, stringy mucus in the nose and throat.
It is also used for a sore throat with a hoarse voice. Some homeopaths give it for nasal polyps (small soft growths inside the nose). Long use within a tradition is not proof that a remedy works.
The remedy is made by diluting chromic acid over and over. At 30C, none of the starting acid is left. Trials do not show any effect beyond placebo (a dummy pill).
Homeopathy rests on an idea called like cures like. The idea is that a substance which causes symptoms in a well person can treat those same symptoms in a tiny dose.
Chromic acid burns the nose, throat and skin of people who work with it. Homeopaths chose it for complaints that look like that damage. This is a rule of thumb, not a proven action in the body.
The liquid is shaken and diluted in steps. By 30C, the chance that even one molecule of the acid is left is close to zero. No one has shown a way for it to act, and trials do not tell it apart from placebo.
You will most often see small sugar pills soaked in the diluted liquid. Liquid drops in water and alcohol are also sold. Common strengths are 6C, 12C, 30C and 200C.
The C means the liquid was diluted one part in a hundred, again and again. A 30C has been through that step thirty times. Raw chromic acid is a lab chemical and is never sold to the public as a remedy.
Chromic acid came into homeopathy in the 1800s. Homeopaths of that time gave substances to healthy people and wrote down what those people felt. Those notes, called provings, shaped how the remedy is used today.
It has always been a small remedy. It sits in old prescribing books beside other acid remedies. No tradition outside homeopathy uses it.
Some reactions to Acidum chromicum 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 if a sore throat, hoarse voice or blocked nose lasts more than a week. A voice that stays rough for three weeks or more always needs a check.
Get help the same day if you have a high fever, or if you cough up blood, or if one side of your neck swells.
Call emergency services right away if you cannot breathe or swallow, if you are drooling, or if anyone swallows, spills or breathes in raw chromic acid.
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 Acidum chromicum 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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