Kali sulphuricum
Made from potassium sulfate — the yellow 'biochemic' salt, and the classical remedy of yellow, changeable discharges.
The whole picture, in one breath
Think of Pulsatilla's yellow discharges but in a hotter, drier person: yellow-green mucus, shifting rheumatic pains that wander, a feeling of internal heat with chilliness, and a disposition gentler than Sulphur but less tearful than Pulsatilla. Yellow discharges, shifting pains: that is Kali sulphuricum.
The substance, in plain words
Potassium sulfate is a common mineral salt — used in fertilizers, glass and medicine's salt family. The old biochemic school made it the salt of 'yellow discharges and wandering pains'; its chemistry is simple, but its classical portrait is distinct.
The traditional picture Classical sources
The inner state
- Changeable moods. Alternating cheerfulness and gloom; anxiety about health in the long catarrhal states.
- Fear of evil. Worse in the dark, anxious foreboding at night.
- Irritability from heat. Cross as the rooms warm — the salt's hot-yellow signature.
The body
- Yellow discharges. The keynote: yellow, yellow-green mucus from any membrane — eyes, nose, chest, vagina.
- Shifting pains. Pains that wander joint to joint, worse warmth, better cool air.
- Internal heat, chilly surface. Hot inside, cold outside; throws off covers then wants them.
- Worse evening and warmth. The late-day climb of heat and catarrh; worse warm rooms and beds.
- Skin eruptions with yellow crust. Eczema oozing yellow fluid; dandruff; crusted scalp.
- Better for fresh air. Like Pulsatilla, open air relieves; unlike her, this patient runs hot.
Modalities (worse and better factors)
| Worse from ⬇ | Better from ⬇ |
|---|---|
| warmth and warm rooms; evening; evening; getting overheated. | cool open air; cold applications; gentle motion. |
Where it acts (organ affinities)
Mucous membranes (yellow discharges), skin (yellow crusts), joints (shifting), respiration.
Where the classical picture comes from
The biochemic school gave Kali-sulph its modern role — the yellow-discharge salt bridging skin and mucosa; classical prescribers used the same portrait for catarrhs, wanderings and crusted skins.
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.
Potassium sulfate itself has no dramatic pharmacology — it is a normal dietary salt — and that modesty is instructive: the remedy's portrait is clinical rather than toxicological. The yellow-discharge states it painted are the everyday catarrhs and eczemas that modern care manages with antihistamines, steroid creams and simple time.
Look-alikes (how the classical authors told it apart)
| Remedy | Looks similar because… | Tells it apart because… |
|---|---|---|
| Pulsatilla nigricans | Yellow discharges, changeable | Pulsatilla is tearful, thirstless and gentle; Kali-sulph is hot, yellow and shifty-pained. |
| Kali bichromicum | Yellow stringy discharges | Kali-bich's mucus is ropy, stringy and fixed in location; Kali-sulph's is loose and wandering. |
| Sulphur | Hot, itchy, yellowish | Sulphur is the great hot red itchy one; Kali-sulph its milder yellow cousin. |
| Mercurius solubilis | Yellow offensive discharges | Mercurius is sweaty, foul and trembling; Kali-sulph is dry-hot and yellow. |