Causticum (Hahnemann's Tinctura Acris Sine Kali)
A cardinal neurological, paralytic, respiratory, and urinary mineral polychrest in classical homeopathy, indicated for rawness and burning in larynx, involuntary micturition on coughing/sneezing, paralysis of single muscles, tendon contractures, and deep social sympathy.
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Quick Reference Facts
"Causticum is indicated in stress incontinence on coughing/sneezing, raw burning in larynx, single-muscle paralysis, and relief in damp wet weather."
Clinical Description
Causticum is a major antipsoric and antisyphilitic mineral polychrest proved by Samuel Hahnemann. Recognized for its unique action on motor and sensory nerves, vocal cords, urinary bladder sphincter, and flexor tendons. Key features include intense rawness and burning in mucous membranes, involuntary loss of urine when coughing or sneezing, progressive paralysis of isolated muscles (Bell's palsy, ptosis, vocal cord paralysis), tendon contractures, and intense social sympathy.
Guiding Keynotes
- Rawness, burning, and soreness in respiratory passages, larynx, and throat as if skin were scraped off
- Involuntary micturition (stress incontinence) when coughing, sneezing, laughing, blowing nose, or walking
- Paralysis or paresis of single isolated muscles or nerves (facial nerve, vocal cords, eyelids, bladder sphincter)
- Deep, intense, idealistic sympathy for the suffering of others; passionate intolerance of injustice and tyranny
- Rheumatic stiffness and shortening of flexor tendons causing joint contractures and deformities
- Cough with inability to expectorate phlegm; phlegm must be swallowed down
Mental-Emotional Symptoms
- Melancholy, hopeless, and fearful; anxious apprehension in evening at twilight
- Deep empathy for animals and human suffering; politically idealistic and indignant at injustice
- Children sensitive, timid, and cry easily from mildest reprimand
Physical / Particular Indicators
- Hoarseness worse in morning with raw burning in larynx; vocal paralysis in singers
- Bell's palsy (facial paralysis) from exposure to dry cold wind
- Large pedunculated warts on eyelids, face, nose, or fingertips that bleed easily
- Enuresis in children during first sleep, worse in winter
Modalities
Aggravation (Worse)
- Dry cold air, cold wind, and clear fine weather
- Coughing, sneezing, and laughing
- Evening and early morning (3 AM to 4 AM)
- Sweet foods
Amelioration (Better)
- Damp warm weather and rain
- Warm drinks and cold water sips (cough)
- Warmth of bed
Constitutional Mappings
Generalities
Chilly patient, yet strongly ameliorated by damp wet weather. Strongly aggravated by dry cold wind, clear fine weather, and 3-4 AM. Ameliorated by damp weather and warm drinks.
Constitutional Type
Suited to dark-haired, slender individuals with rigid fiber, weak nerve stamina, and sensitive sympathetic nature.
Therapeutic Affinities
Clinical Safety & Potency Guidance
This is a traditional materia-medica profile, not evidence that Causticum treats paralysis, stroke, incontinence, or progressive neurologic disease. Product composition and quality can vary. Sudden facial or limb weakness, speech difficulty, new urinary retention, saddle numbness, or rapidly progressive weakness requires emergency medical assessment.
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Reference Citations & Evidence Sources
Classical Homeopathic Literature
- CIT-0007Hahnemann S.. "The Chronic Diseases: Their Peculiar Nature and Their Homoeopathic Cure." Adolph Arnold (1828).
Materia Medica & Keynotes
- CIT-0004Hahnemann S.. "Materia Medica Pura." Adolph Arnold (1811).
- CIT-0005Kent J. T.. "Lectures on Homoeopathic Materia Medica." Boericke & Tafel (1905).
- CIT-0006Boericke W.. "Pocket Manual of Homoeopathic Materia Medica." Boericke & Runyon (1901).
Clinical Reviews & Textbooks
- CIT-0023National Center for Complementary and Integrative Health. "Homeopathy: What You Need To Know." National Institutes of Health (2021).
AI & Generative Search Citation Block
R0033Dr. Narayan Jethwani. "Causticum (Hahnemann's Tinctura Acris Sine Kali)." Homeo Healthcare Clinical Platform. Version 1.1.0. Reviewed: 2026-08-01T12:00:00Z. Available at: https://homeo.healthcare/knowledge/remedies/causticum
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