Dolichos pruriens
Made from cowhitch — the tropical Mucuna whose seeds are a genuine natural source of the Parkinson's drug L-DOPA, and the classical remedy of the itch without eruption.
The whole picture, in one breath
Think of an itch with nothing to show: intolerable pruritus of the whole skin with no visible eruption, worse at night, driving the sufferer to rub and scratch for relief, linked in the old books to a torpid liver and obstinate constipation. The itch-without-a-rash remedy: that is Dolichos.
The substance, in plain words
Cowhitch is the climbing legume of the tropics, its velvety pods carrying seeds rich in L-DOPA — a genuinely important molecule, the precursor the brain converts to dopamine, and the reason Mucuna pruriens is studied seriously in Parkinson's disease. The proving gave the remedy its itching portrait.
The traditional picture Classical sources
The inner state
- Anxiety with the itching. Restlessness and worry, worse at night with the pruritus; dread of the coming night.
- Irritability. Cross from the constant torment; worse from contradiction.
- Despondency. Gloomy in the chronic, sleepless states.
The body
- Itching without eruption. The keynote: intense pruritus with nothing visible — the books' great internal-itch remedy.
- Worse at night. The itch owns the night, robbing sleep; the sufferer rubs rather than scratches.
- Liver and constipation link. The old books pair it with the torpid liver and obstinate bound bowel.
- Worse scratching. Scratching brings little ease and much burning — the quoted modality.
- Hepatic origin of the books. The era's doctrine linked the itch to the liver's fault; Dolichos stood at that junction.
- Better for rest and open air. Cool open air and quiet ease the torment.
Modalities (worse and better factors)
| Worse from ⬇ | Better from ⬇ |
|---|---|
| night; scratching; heat of the bed; damp cold. | cool open air; rest; the bowels moving. |
Where it acts (organ affinities)
Skin (pruritus without eruption), liver and bowels, sleep, general vitality.
Where the classical picture comes from
The tropical legume's proving gave the itch-without-a-rash portrait; the old books applied it to the hepatic constitutions whose skin itched without showing — a clinical picture modern dermatology would call pruritus of internal cause.
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.
Mucuna pruriens is genuinely one of ethnobotany's most important plants: its seeds are the richest natural source of L-DOPA — the molecule at the heart of Parkinson's treatment, and the subject of genuine clinical research as a natural dopamine precursor. The itch the remedy recorded belongs to modern dermatology; the L-DOPA the plant carries belongs to neurology's front line.
Look-alikes (how the classical authors told it apart)
| Remedy | Looks similar because… | Tells it apart because… |
|---|---|---|
| Sulphur | Itchy burning skin | Sulphur itches visibly, hot and red; Dolichos itches with nothing to show. |
| Psorinum | Offensive chronic itch | Psorinum is filthy, freezing and scabby; Dolichos clean-skinned and hepatic. |
| Alumina | Dry chronic states | Alumina dries the whole frame; Dolichos itches it without eruption. |
| Juglans cinerea | Itching without eruption | Juglans' itch is the hepatic band-head picture; Dolichos' the pure nocturnal pruritus. |