Aethusa cynapium
Made from fool's parsley — the hemlock-relative of European hedgerows whose poisonings taught the vomiting-of-milk portrait, and the classical remedy of the milk-intolerant infant.
The whole picture, in one breath
Think of the baby who cannot keep its milk: vomiting of curdled milk in great lumps, exhaustion to stupor after the feed, a red-hot face with sweating, a drawn, aged expression between feeds, and slow emaciation despite adequate feeding. The milk-intolerant infant: that is Aethusa.
The substance, in plain words
Fool's parsley is the innocent-looking relative of the hemlock family, its poisonings recorded across Europe — convulsions, stupor, vomiting. The proving gave the remedy its famous infant portrait: the child whose whole system rejects milk, sinking into the stupor of the books.
The traditional picture Classical sources
The inner state
- Stupor between feeds. The keynote of the infant-mind: exhausted, half-stupid after the vomiting, then the anxiety of the next feed.
- Anxiety and fear. In the older provers: fear, confusion, the dread of the poisoned state.
- Irritability. Cross, restless, before the vomiting comes.
The body
- Curdled milk vomiting. The keynote: milk vomited in large curds — the books' great characteristic — then exhaustion.
- Stupor after feeding. The baby sinks into sleepiness so deep it alarms; the books describe the drawn, aged face.
- Red hot face with sweat. Flushed, sweating, burning during the intolerance.
- Slow emaciation. Despite adequate feeding, the child wastes — the era's great anxiety, understood only dimly then.
- Convulsions of the poison. The proving records the family danger: convulsions, the hemlock-relative's threat.
- Worse milk and the feed. Every feed restarts the cycle — the books prescribe rest between feeds and the remedy's hope.
Modalities (worse and better factors)
| Worse from ⬇ | Better from ⬇ |
|---|---|
| milk and feeding; heat; motion; the evening feed | rest between feeds; open cool air; small feeds. |
Where it acts (organ affinities)
Stomach and digestion of the infant, nervous system (stupor, convulsions), nutrition.
Where the classical picture comes from
The hedgerow poison's infant-vomiting portrait — recorded in the poisonings and confirmed in proving — made Aethusa the classical remedy of the milk-intolerant baby, in the era before cow's-milk protein allergy and lactose intolerance had names.
The substance in real medicine Pharmacology
What this section is: the pharmacology and toxicology of the source substance. It is not clinical evidence that a homeopathic preparation of it treats any condition. What controlled trials do and do not show is set out on the Evidence page.
Fool's parsley is genuinely poisonous — the hemlock family's convulsant chemistry is real and dangerous, and its confusion with parsley is a documented cause of accidental poisoning. The milk-intolerance it portrayed is now understood and managed: cow's-milk protein allergy, lactose intolerance and reflux all have modern, effective answers — the baby's drawn face has a diagnosis now.
Look-alikes (how the classical authors told it apart)
| Remedy | Looks similar because… | Tells it apart because… |
|---|---|---|
| Calcarea carbonica | Sweaty, intolerant infant | Calc-carb is the sour-sweating, egg-craving child; Aethusa the milk-vomiting stuporous one. |
| Silicea | Weak, wasting infant | Silicea is the fine-boned, sweaty, slow-healing child; Aethusa the milk-intolerant one. |
| Antimonium tartaricum | Vomiting, drowsiness | Ant-tart is drowsy and rattling; Aethusa stuporous after the curdled vomit. |
| Bryonia | Irritable digestion | Bryonia is the dry, thirsty, still one; Aethusa the milk-rejecting infant. |