Lac caninum
The classical remedy prepared from dog's milk — the diphtheria era's faithful companion, and the classical remedy of the complaint that alternates sides.
The whole picture, in one breath
Think of a complaint that crosses over: throat trouble that begins on the left and moves right, or right and moves left; breast pains that alternate sides; the books' great alternating-side remedy, born in the diphtheria wards where sides mattered desperately. The crossing-over remedy: that is Lac caninum.
The substance, in plain words
Lac caninum is prepared from dog's milk — a remedy of the old school built on the diphtheria wards of the nineteenth century, where the side of the throat decided the danger. Its preparation is as old as the disease it served; the proving gave the remedy the alternating-side keynote that made it famous.
The traditional picture Classical sources
The inner state
- Anxiety and fear. Fear of death, of the disease, worse at night; the books record the dread of the wards.
- Irritability. Cross, worse from contradiction and noise.
- Despondency. Gloomy in the long, alternating states.
The body
- Symptoms alternate sides. The keynote: every complaint alternates sides — left to right, right to left — the books' celebrated signature.
- Diphtheritic throat of the books. The membrane and swelling that cross sides; the era's great throat remedy.
- Breast pains alternating. The mammae alternately painful — the books' quoted confirmatory use.
- Swollen glands with the throat. The cervical glands swell and cross with the complaint.
- Worse cold damp and night. Wet weather and night deepen the states.
- Better for rest and quiet. Rest, quiet and warmth ease the crossing complaint.
Modalities (worse and better factors)
| Worse from ⬇ | Better from ⬇ |
|---|---|
| cold damp weather; night; exertion; before the menses. | rest; quiet; warmth. |
Where it acts (organ affinities)
Throat and glands, breasts, general constitution.
Where the classical picture comes from
The diphtheria wards wrote the proving's keynote: the throat membrane that decided the danger by its side — and the remedy whose symptoms crossed sides became the ward's faithful companion. Lac caninum is the record of an era when a sore throat could still be a death sentence.
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.
Diphtheria itself is the real story: once the terror of childhood, it was conquered by antitoxin in the 1890s and then by vaccination — one of immunology's earliest triumphs. The dog's-milk remedy belongs to the wards that antitoxin emptied; the disease it served is now a rare, vaccine-preventable memory.
Look-alikes (how the classical authors told it apart)
| Remedy | Looks similar because… | Tells it apart because… |
|---|---|---|
| Lachesis muta | Left-sided throat | Lachesis is left-sided, purple and worse after sleep; Lac caninum crosses sides. |
| Mercurius solubilis | Throat and glands | Mercurius is sweaty, foul and trembling; Lac caninum is the crossing one. |
| Apis mellifica | Throat swelling | Apis is rosy, puffy and thirstless; Lac caninum is the diphtheria-era crosser. |
| Phytolacca decandra | Throat and breasts | Phytolacca shoots to the ear and radiates; Lac caninum alternates sides. |