Rhus venenata
Made from poison sumac — the swamp brother of the ivy and the oak, the same urushiol in its most water-loving form, and the classical remedy of the damp-worse blistering state.
The whole picture, in one breath
Think of the sumac's mirror of the ivy: the same blistering, itching, rest-worse state, but with the books noting its own shading — more sensitive to the damp, more inclined to the swollen, weeping surfaces, and the poison of the American swamps. The swamp-sumac remedy: that is Rhus venenata.
The substance, in plain words
Poison sumac is the water-loving shrub of American swamps, its urushiol resin the same chemistry as poison ivy and poison oak — genuinely the most potent of the three in folk estimation, and a real, documented contact allergen. The proving gave the remedy the family portrait with its own damp accent.
The traditional picture Classical sources
The inner state
- Restlessness and anxiety. The family restlessness — must move with the complaints, worse at night.
- Irritability. Cross from the smarting and the itching.
- Despondency. Gloomy in the chronic states.
The body
- Blistering, weeping eruptions. The keynote: the same urushiol vesicles — the books describe the weeping, swollen surfaces of the sumac state.
- Worse cold damp. The accent of the remedy — the swamp poison is most at home in wet weather's aggravation.
- Worse rest, better motion. The family signature — stiffness and soreness relieved by continued gentle motion.
- Swollen, stiff joints. The rheumatic stiffness of the family, with the swollen joints of the books.
- Worse night. The night owns the itching and the stiffness.
- Better for warmth and motion. Warmth, wrapping and motion ease the sumac state.
Modalities (worse and better factors)
| Worse from ⬇ | Better from ⬇ |
|---|---|
| cold damp weather; rest; night; wet and swampy exposure. | continued motion; warmth; dry weather. |
Where it acts (organ affinities)
Skin (weeping eruptions), joints and muscles, general vitality.
Where the classical picture comes from
The poison-sumac proving gave the family portrait with the damp accent; Rhus venenata became the classical third of the urushiol trio — ivy, oak and sumac each recorded, each faithful to the same chemistry.
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.
Poison sumac's urushiol is genuinely the most feared of the three American contact poisons — the same allergen chemistry, in the swamp's most potent plant, documented in every dermatology of the New World. The family it belongs to taught immunology what delayed allergy is; the remedies it gave the library are the toxicology's triple portrait.
Look-alikes (how the classical authors told it apart)
| Remedy | Looks similar because… | Tells it apart because… |
|---|---|---|
| Rhus toxicodendron | The Rhus trio | Rhus tox is the general remedy; Rhus venenata the swamp-damp accent of the same family. |
| Rhus radicans | The ivy twin | Rhus radicans is the climbing vesicular one; Rhus venenata the swampy weeping one. |
| Anacardium orientale | Vesicant family | Anacardium is the marking nut; the Rhus trio the American urushiol plants. |
| Petroleum | Weeping skin | Petroleum weeps in winter cold; Rhus venenata in the damp with the rest-worse stiffness. |