What is Phellandrium aquaticum?
Phellandrium aquaticum is a homeopathic remedy. It is made from water fennel, a tall plant that grows in ponds and wet ditches. Its Latin name is Oenanthe aquatica.
It is a single drug remedy. That means it is made from one plant, not a mix of several. Homeopaths have used it for a long-lasting cough that brings up thick, bad-smelling phlegm (mucus).
It is also a well-known homeopathic pick for sore, cracked nipples during breastfeeding. Old homeopathic texts list it for sharp pain in one side of the chest as well.
The remedy is made by diluting the plant over and over. Each step takes a tiny drop and mixes it into a large amount of water or alcohol. At 30C, there is no plant matter left at all.
Here is the plain verdict. No human trial has tested this remedy for any health problem.
Large reviews of homeopathy as a whole have not found effects beyond placebo (a dummy treatment). Long use in a tradition is not proof that a remedy works.
One more thing matters a lot. The fresh plant is poisonous. Never eat it, chew its seeds or drink its juice, and handle the strong tincture with care.
Most people buy the remedy as small sugar pellets or as liquid drops. It is sold without a prescription in many countries. It is not a stand-in for care of asthma, pneumonia or any other chest illness.
How does Phellandrium aquaticum work?
There is no known way this remedy could act on the body at normal strengths. At 30C, no plant is left, so there is nothing to act.
Homeopathy rests on two old ideas. The first is 'like cures like'. It says a substance that causes symptoms in a well person can ease the same symptoms in a sick person.
The second idea is that shaking at each dilution step leaves some kind of trace or pattern in the liquid. Chemistry and biology have not found any such trace. So treat this as a belief within the tradition, not a proven action.
Any benefit people report is best explained by time, by care and attention, and by placebo effect.
What forms does Phellandrium aquaticum come in?
You will usually see these forms: - Sugar pellets or tiny pills, sucked under the tongue - Liquid drops, made with water and alcohol - Mother tincture, a strong plant extract, sold only in some countries
Common strengths are 3X, 6X, 6C and 30C. A higher number means more dilution steps and less chance of any plant being present.
The mother tincture and very low strengths are the ones to be careful with, because plant material can still be there.
Where it comes from:
Water fennel grows across Europe in slow water and marshes. Old European folk medicine used the seeds for coughs and chest trouble. People also knew the plant as risky to eat.
Homeopaths took it up in the 1800s. It appears in 19th-century homeopathic reference books, listed for coughs with heavy phlegm and for sore nipples in nursing mothers.
It has always been a small remedy inside homeopathy, not a leading one. It has no standing in Ayurveda, Chinese medicine or Western herbal practice today.
If this is an emergency
Some reactions to Phellandrium aquaticum need urgent care. Call your local emergency number or go to an emergency department straight away — do not wait to see whether it passes.
Who should avoid Phellandrium aquaticum?
- Never eat, chew or drink any part of the fresh water fennel plant, its seeds or its juice. It is poisonous.
- Do not use the mother tincture or strengths below 6C unless a doctor who knows this plant tells you to.
- Do not use it instead of treatment for asthma, pneumonia, tuberculosis or any other chest illness.
- Do not use it if you have epilepsy (a condition that causes fits), unless you stay with high dilutions and your doctor agrees.
- Do not use it if you are pregnant or breastfeeding, unless your doctor or midwife says it is safe for you.
- Do not give it to a baby or a young child without advice from a doctor.
- Do not use the alcohol-based drops if you are avoiding alcohol, or if you take disulfiram or metronidazole (medicines that react badly with alcohol).
- Do not use it if you have ever reacted badly to plants in the carrot family, such as fennel, celery, parsley or carrot.
- Do not stop or lower any prescribed medicine in order to take this remedy.
When should you see a doctor?
See a doctor if your cough lasts more than three weeks, or if the phlegm turns green, bloody or smells foul.
Get urgent help if you cannot catch your breath, have chest pain, run a fever, sweat at night or lose weight without trying.
If you are breastfeeding, see a doctor or midwife if a sore nipple comes with fever, red streaks on the breast or a hard, hot lump.
Call emergency services at once if anyone swallows the raw plant or a large amount of tincture. Watch for vomiting, dizziness, twitching or fits. Take the pack or plant with you.
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