What is Acidum boricum?

Acidum boricum is a homeopathic remedy. It is made from boric acid, a white powder once used as a mild germ killer. Homeopaths give it for burning, raw feelings in the mouth, nose, skin or bladder.

It is a single remedy. That means it comes from one source, not a mix of several. Its Latin name is Acidum boricum, and it is also sold as Boric acid or Boricum acidum.

Here is the short verdict: the source is watered down again and again, and at 30C no boric acid is left in the pill. Trials have not shown homeopathy to work better than a dummy pill. Long traditional use is not proof that a remedy works, and we do not treat it as proof anywhere on this page.

How does Acidum boricum work?

Homeopathy rests on two ideas. Neither one has held up in testing.

The first idea is "like cures like". Raw boric acid can burn the skin, mouth and gut. So homeopaths give a tiny trace of it to people with burning pains.

The second idea is that watering a substance down makes it act more strongly. The maker shakes and dilutes (waters down) the source over and over. By 30C, no source material is left at all.

Because nothing of the boric acid remains, there is no known way for the pill to act on your body. Any change people notice is best explained by the placebo effect, which means feeling better because you expect to.

What forms does Acidum boricum come in?

Most people buy small sugar pills or pellets. Liquid drops in water and alcohol are also sold.

Strengths are written as a number and a letter, such as 6C, 30C or 200C. Each step means another round of watering down. The 6X and 30X labels work the same way, with smaller steps.

Low strengths such as 1X, 2X and 3X can still hold real boric acid. Treat those as a drug, not as an inert sugar pill.

Pick pills rather than drops if you avoid alcohol.

Where it comes from:

Boric acid was first made from borax in the 1700s. By the 1800s it was a common household germ killer for eyes, ears and wounds.

Homeopaths gave it to healthy people in the 1800s and wrote down the burning, raw symptoms they saw. From there it went into the homeopathic materia medica, which is the reference list of remedies.

It has stayed a minor remedy. Homeopathic texts know it, but no other healing tradition uses it.

What does Acidum boricum help with?

• Sore, burning mouth and mouth ulcers: This is the best known use in homeopathic books. Texts describe small white sores with a raw, burning feel. No human trial has tested the remedy for mouth sores, so we cannot say it helps.
• Dry, crusty nose: Homeopaths pick it when the nose feels dry, hot and blocked with crusts. This comes from old symptom lists, not from trials. Salt water rinses have real evidence behind them and are cheap.
• Burning when you pass urine: Old texts list burning at the end of passing urine. Burning urine often means an infection that needs proper treatment. There is no trial support for using the remedy here, and delay can make an infection worse.
• Watery vaginal discharge with soreness: Homeopathic books describe a hot, watery discharge that stings. Note that vaginal boric acid capsules are a different product with real boric acid in them. The homeopathic pill has not been tested for this.
• Burning, itchy skin rashes: Texts mention dry, burning, itchy skin. No study has tested the remedy on any skin problem. A rash that spreads, blisters or comes with fever needs a doctor.
• Nausea with a hot, dry mouth: This shows up in the old symptom picture rather than in research. There is no human evidence that the remedy settles nausea.

Which foods are rich in Acidum boricum?

1. Raisins and prunes: dried fruit holds boron, the mineral in boric acid
2. Almonds and peanuts: another everyday source of boron
3. Avocado: one of the richer fruit sources of boron

Practical Tips:

Boron in food is not the same as this remedy, and no food changes how the remedy works.

What are the side effects of Acidum boricum?

• No direct drug effects are expected from 30C pills, because no boric acid is left in them
• Sugar in the pills, which is worth counting if you have diabetes (high blood sugar)
• Lactose (milk sugar) in the pills, which can upset your gut if you cannot digest it
• Alcohol in the liquid drops, which matters if you avoid alcohol
• A short flare of symptoms, which homeopaths call an aggravation; this has not been shown to be a real drug effect
• Real poisoning from low strengths such as 1X to 3X, which may still hold boric acid: nausea, vomiting, watery diarrhoea, a bright red rash, kidney damage and fits (seizures)
• Harm from delay, if the remedy is used in place of care that works

Good to know:

Side effects from a 30C pill are very rare. There is nothing in it but sugar or watered-down alcohol.

The real risks sit elsewhere. One is a very low strength that still holds boric acid. The other is putting off proper treatment.

Raw boric acid is a poison. Babies have died after swallowing it. Keep every boric acid product, such as ear drops, eye wash and ant bait, well away from children.

How much Acidum boricum should you take?

• Recommended daily: No dose has been shown to do anything, so no amount is truly established. Labels for adults usually say 3 to 5 pills of 6C or 30C, two or three times a day. Follow the label on the pack you bought. A higher number such as 200C is not a stronger drug; it is simply watered down further. Do not give it to a baby or young child unless a doctor says it is fine.
• Best time of day: No time of day works better than another. Homeopaths usually suggest taking it between meals, but this is custom, not evidence.
• With or without food: Homeopaths advise letting the pill melt under your tongue about 15 minutes away from food, drink, mint or strong smells. No study shows that this matters. Food does not make the pill safer or riskier, since there is nothing in it to absorb.
• Time to effect: There is no reliable evidence that it works at all, so no honest time frame exists. Homeopaths expect a change within a few days for a sudden problem. If you feel no different after a week, stop.
• How long to take it: Keep any trial short. A few days is enough for a minor, short-lived problem. If nothing has changed in about a week, stop and see a doctor. Do not keep taking it for weeks for a problem that is not getting better.