What is Nitricum acidum?

Nitricum acidum is a single homeopathic remedy. It is made from nitric acid, a strong acid used in industry. Homeopaths pick it for painful cracks and splits in the skin, mouth sores, warts, and sharp stinging pains.

The remedy is made by diluting the acid over and over, with shaking at each step. At 30C, the usual strength sold in shops, not one molecule of the acid is left. What you take is water, alcohol, or sugar pellets.

Trials do not show that homeopathic remedies work better than placebo (a dummy pill with no active drug in it). Long use in a tradition is not proof that a thing works. This page reports the tradition and the evidence side by side, so you can judge both.

How does Nitricum acidum work?

There is no known way this remedy could act on the body, and no accepted proof that it does.

Homeopaths work from two ideas. The first is 'like cures like': a substance that causes symptoms in a well person is said to ease those same symptoms in a sick one. The second is that shaking each dilution leaves some trace or pattern in the water.

Chemistry does not support the second idea, and physics offers no mechanism for it. Any benefit people notice is best explained by the calm of a long consult, by time, and by the placebo effect.

What forms does Nitricum acidum come in?

Sugar pellets are the most common form. You let them melt under the tongue rather than chewing them.

You can also find liquid drops in water and alcohol, and creams or gels sold for skin cracks. Strengths are labelled 6C, 30C, 200C, or 6X and 30X. Higher numbers mean more dilution, not more drug.

Where it comes from:

Nitric acid has been known to chemists since the Middle Ages, where it was used to part gold from silver. Homeopathy itself began in Germany around 1800 with Samuel Hahnemann.

Nitricum acidum was tested on healthy volunteers in the 1800s and written up in early homeopathic texts. It has stayed a well-known remedy in homeopathic practice ever since. That standing sits inside one tradition, not across many.

What does Nitricum acidum help with?

• Painful cracks or splits in the skin (fissures): This is the classic reason homeopaths choose it, especially for cracks at the corners of the mouth, on fingertips, or around the nails. The old texts describe pains like a splinter or sharp stick. No human trial has tested Nitricum acidum for skin cracks.
• Mouth ulcers and cracked lips: Homeopathic texts link this remedy to raw, burning sores in the mouth and on the tongue. Most mouth ulcers clear on their own in one to two weeks, which makes any remedy look effective. There is no trial evidence for this use.
• Warts: Tradition points to ragged, jagged warts that bleed easily when rubbed. Warts often go away by themselves over months, so improvement is hard to credit to any product. Human evidence for this remedy in warts has not been published.
• Anal fissure (a tear in the skin at the back passage): Homeopaths have long used this remedy for tearing pain after passing stool. This symptom needs a proper check, because it can also come from other conditions. See a doctor rather than self-treating; no trial supports the remedy here.
• Sharp, splinter-like pains: In homeopathic teaching, the remedy is matched to a type of pain rather than a named disease. This is a picture from the texts, not a tested claim. No human study has looked at it.

What are the side effects of Nitricum acidum?

• No physical effects expected from 30C and higher strengths
• Sugar load from pellets, which matters if you have diabetes
• Rare reaction to lactose (milk sugar) in the pellets, such as bloating or loose stools
• A short flare of symptoms, which homeopaths call an aggravation, though this is not confirmed by testing
• Burning or irritation of the mouth, throat, or stomach from very low strengths that still contain real acid
• Delay in getting a proper diagnosis, which is the main real-world risk

Good to know:

At 30C the product is sugar, water, or alcohol, so direct harm is very unlikely. The bigger risk is using it instead of care that works. Skin splits, mouth sores, and lumps can all have causes that need treatment.

How much Nitricum acidum should you take?

• Recommended daily: No dose has been set by trials, because there is no measurable active substance at 30C. Packets usually suggest 3 to 5 pellets of a 30C strength, two or three times a day, for a short spell. Homeopaths often give fewer doses of a stronger dilution, such as one dose of 200C. Follow the label, and never use a homeopathic product in place of a treatment your doctor has prescribed.
• Best time of day: There is no meaningful timing. Homeopathic custom is to take doses away from food, drink, coffee, and strong mint. That custom comes from tradition, not from testing.
• With or without food: Usual practice is about 15 to 30 minutes before or after food or drink. Let the pellets melt under the tongue. If you must take them with food, no harm is expected.
• Time to effect: Sellers often say hours to days. Any change you notice in that window is most likely the problem settling on its own, or the placebo effect.
• How long to take it: Keep any self-directed use short, a few days at most. If nothing has changed in a week, stop and think again. Any cracked skin, ulcer, or wart that lasts more than two to three weeks, bleeds, or grows should be looked at by a doctor.