What is Arsenicum iodatum?

Arsenicum iodatum is a homeopathic remedy. It starts out as arsenic iodide, a mix of arsenic and iodine. Both are poisons in raw form.

The raw mix is watered down again and again, with shaking at each step. This is called serial dilution. At the common 30C strength, no source matter is left in the pill at all.

Homeopaths give it for long-lasting runny noses, hay fever, coughs and dry skin. Trials do not show it works better than a dummy pill. Long use in homeopathy is not proof that a remedy works.

This page sets out what tradition says, what the evidence says, and where the real risks lie. The risks sit with low-strength products, which can still hold arsenic and iodine.

How does Arsenicum iodatum work?

There is no known way for this remedy to act on the body. At 30C the pill holds no arsenic and no iodine. In chemical terms it is sugar.

Homeopathy rests on an old idea called "like cures like". A substance that causes signs in a well person is said to ease those same signs in a sick one, once watered down. Science has not found support for this idea.

Water is not known to hold a "memory" of what was once in it. Good feelings that people report are best explained by placebo (a dummy pill effect) and by time. That is an honest read of what we have.

What forms does Arsenicum iodatum come in?

You will most often see small white sugar pills that melt under the tongue. Drops in an alcohol and water base are also sold, as are plain tablets.

Strengths are marked with a number and a letter, such as 6C, 30C or 200C. X strengths like 3X and 6X are watered down less, so they can hold traces of the raw stuff. A higher number means more watering down, not more power.

Some products mix several homeopathic ingredients in one pill. Read the label so you know what you are buying.

Where it comes from:

Arsenicum iodatum came into homeopathic use in the mid-1800s. Homeopaths took it themselves and wrote down every feeling they had. Those notes became its traditional picture.

It won a place in American and Indian homeopathy for thick, sticky catarrh (mucus in the nose and chest). It was also linked to thin, restless people who eat well but stay thin.

It is a staple of homeopathy alone. It has no separate record in herbal medicine or in folk use.

What does Arsenicum iodatum help with?

• Long-lasting runny or blocked nose: This is the best known traditional use. Homeopathic texts describe thin, burning mucus that makes the nose and lip sore. No human trial has tested this remedy for it, so the traditional use stands alone.
• Hay fever: Homeopaths pick it for sneezing fits with watery, stinging discharge. Studies of hay fever remedies in general have not shown a clear effect beyond placebo. Nothing has been published on this remedy on its own.
• Long-term cough with thick mucus: Old texts list a rattling chest and thick green mucus. A cough that lasts more than three weeks needs a doctor, not a home remedy. There is no trial evidence here.
• Dry, flaky, itchy skin: Tradition links it to dry skin that sheds in flakes, often on the scalp and behind the ears. Plain moisturiser has far better support for dry skin. No human trial backs this use.
• Swollen glands in the neck: Homeopathy has long used it for hard, swollen neck glands. A lump in the neck that lasts more than two weeks must be checked by a doctor. There is no trial evidence.
• Thyroid complaints: Some homeopaths pick it for an overactive thyroid with a fast pulse and weight loss. Thyroid disease is serious and treatable with real medicine. Do not swap your treatment for this, and note that low-strength products hold iodine, which acts on the thyroid.
• Feeling thin and restless with a big appetite: This is a "constitutional picture", a body and mood type that homeopaths match to the remedy. It is a matching rule, not a diagnosis. Weight loss you did not plan needs a medical check.

Which foods are rich in Arsenicum iodatum?

1. Seaweed and kelp: very high in iodine
2. Iodised salt: the main iodine source in many diets
3. Fish and shellfish: hold iodine and small amounts of arsenic
4. Rice and rice drinks: can hold traces of arsenic
5. Some well water: can hold arsenic in parts of the world

Practical Tips:

These foods show where arsenic and iodine turn up in daily life. They are not a way to take this remedy.

What are the side effects of Arsenicum iodatum?

• Most people report nothing at all from a 30C pill
• Mild tummy upset
• Itching or a rash, which is rare and may be a reaction to the pill base
• Wind or loose stools in people who cannot digest lactose (milk sugar) in the pills
• A short flare of your own symptoms, which homeopaths call an aggravation
• Feeling sick, vomiting, watery stools or pins and needles in the hands and feet after low-strength products, which can be signs of arsenic in the body
• Neck swelling, a fast pulse or changes in weight and mood from iodine in low-strength products
• Putting off real care for a problem that needs it, which is the main risk

Good to know:

Side effects from a 30C pill are very rare. The pill holds no drug, so it acts like sugar.

The real worry is low-strength products such as 3X or 6X. These can hold real arsenic and iodine. Arsenic is a poison that builds up in the body, and long contact with it is linked to cancer and to nerve and skin damage.

Stop and call a doctor if you feel sick, get watery stools, or get tingling in your hands or feet after taking it.

How much Arsenicum iodatum should you take?

• Recommended daily: No dose has been shown to work, because no effect has been shown. Makers usually suggest 3 to 5 pills under the tongue, two or three times a day. A homeopath may instead give one dose of 30C and then wait.
• Best time of day: Any time of day. Makers often say to take it away from strong tastes such as coffee, mint or toothpaste.
• With or without food: Between meals is the usual advice. Take it about 15 minutes before or after food or drink.
• Time to effect: There is no proven effect, so no honest timing can be given. People who report a change usually say it came within a few days.
• How long to take it: Most labels suggest a few days only. If nothing has changed in a week, stop and get proper medical advice. Do not take it for months on end, and never in place of a treatment your doctor has given you.