Drosera Rotundifolia — Homeopathic Remedy Profile

Drosera is the spasmodic cough polychrest. Prepared from the fresh tincture of Drosera rotundifolia, the small insectivorous sundew of damp prairies and peat-bog margins, this remedy holds a particular place in the materia medica of respiratory disease — the place reserved for the cough that comes in violent breathless paroxysms after midnight, ends in retching or a streak of bright blood, and leaves the patient pressing their chest with both hands. Common potencies run from 30C through 200C and 1M, generally given as a single dose.

Source and Preparation

Drosera rotundifolia is a curious little plant — a carnivore disguised as a flower, fringed with red glandular hairs that catch and digest insects on the wet ground of European and North American bogs. Eighteenth-century German physicians used it for hoarseness, chest disorders, and what they then called consumption. Teste placed Drosera in his Zincum group and observed that the plant grows along the margins of marshes and is avoided by animals. It was Barrich who documented the fatal consequence: sheep that eat the sundew develop a persistent cough and, in time, die of it. That observation became the seed of the homeopathic indication. The preparation is straightforward: a tincture of the active fresh plant, succussed and serially potentized. What the remedy transmits to the self-governing principle of the organism is a pattern — the very spasmodic, barking, breath-stealing cough that crude Drosera produces in healthy provers.

Hahnemann singled out Drosera as one of the clearest demonstrations of the homeopathic principle. He had given crude doses to provers with such alarming results — paroxysms resembling the early stages of tubercular disease — that he became persuaded the substance, properly attenuated, would heal what it had inflicted. He recommended Drosera as the principal remedy for whooping cough and warned that even in high potency it should not be repeated often. That warning still stands. Practitioners who repeat Drosera too eagerly often spoil the case.

The Essence of Drosera

The state Drosera answers to is one of constriction, spasm, and rising panic confined to the throat and chest. The cough is not a productive expression. It is an explosion. Paroxysms follow each other so rapidly the patient cannot take a breath between them, the face flushes deep red and then dusky blue, the eyes seem about to start from the head. Then, as suddenly as it began, the spasm releases — often with a retch, a vomit of food, a thread of bright blood from the nose, or all three at once. The patient lies back exhausted, perspiring on the forehead, and waits for the next attack.

In children with whooping cough, the cycle is unmistakable. The titillating tickle in the larynx begins the moment the head touches the pillow at night. The child has been bright and active all day. Now the cough seizes them — deep, hoarse, barking — and the parents discover that only sitting the child upright in bed gives any relief. They learn, often by accident, that pressure on the chest helps. The child instinctively presses both hands against the sternum during each paroxysm, exactly as a Bryonia patient holds their pleuritic side.

The mental shadow behind the cough is one of restless mistrust. The Drosera patient becomes self-willed and obstinate, easily angered by trifles, anxious in the evenings — especially when alone. Murphy and Clarke both describe a dread of the night, a fear of ghosts, and in extreme cases a delusion of being persecuted by spiteful, envious people. There is even a strange impulse recorded in the older provings toward drowning — an evening anxiety as if it would impel the prover to suicide by water. These mental shadows do not need to be present for the cough indication to hold. But when they are present alongside the cough, the prescription is firmly indicated.

The constitution most often answered by Drosera is the tubercular one — pale, anemic, easily exhausted, prone to enlarged cervical glands, with a tendency to throat and chest complaints that linger. Hahnemann saw Drosera not only as a curative in the acute paroxysm but as a remedy that raises the resistance of such constitutions against tubercular disease itself.

Clinical Portrait

Mind and Temperament

The Drosera mind is irritable and obstinate, given to fixed plans pursued with unreasonable pertinacity. A trifle places the patient beside themselves. Restlessness is marked — they cannot settle on one subject, drift away. Yet underneath the irritability is fear: anxiety in the evenings, dread of the night, fear of being alone but at the same time suspicion of those who would keep them company. Murphy records the curious combination of fearing ghosts and mistrusting friends. In the depths of the remedy, the mood is depressed and gloomy, with forebodings about the future and unaccountable homesickness.

Head and Sensorium

Pressive pains in the forehead and cheekbones, sometimes with nausea and dizziness — the kind of headache that follows a long bout of coughing or a session of loud speaking. The pain worsens on stooping and improves with motion and cool air. Stepping jars the brain painfully. Vertigo on walking in open air, with a peculiar tendency to fall toward the left side. Eyes dry, prominent, exhausted; they ache outward, especially on stooping, and letters run together while reading. Photophobia.

Throat and Larynx

This is the seat of the remedy. The voice is deep, rough, hollow, toneless — it requires effort to speak, and the speaker tires quickly. Murphy and Boericke both place Drosera at the head of the rubric for clergyman's sore throat and speaker's sore throat, with a rough, scraping, dry sensation deep in the fauces. Hoarseness is constant.

The sensation that defines the larynx is foreign-body. The patient feels as if a soft substance — a feather, a crumb of bread — were lodged there. Swallowing solids is difficult, as from contraction of the throat itself. A tickling crawls in the larynx and provokes the cough; this is the trigger, the sentinel symptom, the one the patient learns to recognize and dread. In severe constitutional cases, laryngeal tuberculosis develops with rapid emaciation.

Cough and Respiration

The Drosera cough is unmistakable once you have heard it. Deep, hoarse, barking, choking, breath-taking. Spasmodic and dry, with violent tickling in the larynx as the trigger. Attacks follow each other so rapidly the patient can scarcely draw a breath between them. The face goes red and then cyanotic. Periodic fits of rapid coughing alternate with periods of relative calm.

The decisive modalities are these: worse after midnight, worse on lying down, worse from talking and singing and laughing, worse from getting warm in bed, worse from cold drinks. Better from sitting up in bed, from open air, from pressure on the chest or painful side. The patient pinches their sides or presses both palms against the sternum during each paroxysm — pain in the chest on coughing forces them to brace the chest with the hand.

The paroxysm typically ends in retching. The patient vomits food, vomits slimy mucus, vomits bile in the morning. Sometimes the violence of the cough produces nosebleed or expectoration streaked with bright red frothy blood. Hemoptysis can follow convulsions of cough. Yellow expectoration with bleeding from the nose and mouth is the classical picture in severe cases.

Within the Drosera picture, asthma is provoked by talking — every word uttered causes contraction of the throat. Dyspnea threatens suffocation, with blueness of the face and lips, cold sweat on the forehead, and vomiting of tough mucus. Oppression of the chest, as if something stopped the voice when coughing or speaking. Tightness of the chest on coughing.

Digestion and Stomach

Food seems tasteless. Bread tastes bitter. There is a strong aversion to pork, to acids, and to sour foods of any kind — and these very things aggravate the patient when taken. Colic follows acidic foods. Fatty food brings on nausea. Mornings are marked by thirst and by vomiting of bile. Water-brash and bitter belching are common. The patient is also markedly worse from tobacco smoke. During the cough, vomiting of food and slimy matter is so characteristic that Boericke uses it as one of his cardinal differential signs.

Sleep

The patient is sleepless, feels too wakeful, and then snores when sleep finally comes — particularly on the back. Sleep at noon and at sunset is characteristic. Frequent waking with perspiration. Vivid, anxious dreams of the wrongdoings of others. Dreams of thirst and drinking, awaking the patient, who must drink. Great weariness on waking. In children, the cough begins the moment the head touches the pillow at night, and sleep is repeatedly interrupted by paroxysms that do not stop until either vomiting clears the airway or the child is propped upright.

Extremities and Back

The limbs feel lame — bruised, beaten, heavy. The bed feels too hard. Pain in the long bones, particularly in the humerus at night. Sciatica with pressing pains worse from pressure, from stooping, from lying on the painful part, and better after rising from bed. The hip joint is painful — paralytic pains in the coxo-femoral joint. Stiffness in the joints of the feet. The fingers contract spasmodically when grasping anything — Drosera is in the rubric for writer's cramp. Stiffness at the nape of the neck with pain on movement; bruise-like pains in the back early in the morning.

Modalities

Worse:

• After midnight, particularly 2–3 a.m. — the classical aggravation
• Lying down — the cough begins as the head touches the pillow
• Warm room, becoming warm in bed
• Talking, singing, laughing, weeping
• Cold food and cold drinks
• Acids and sour foods
• Stooping
• Tobacco smoke
• After measles — Drosera is one of the principal remedies for post-measles cough

Better:

• Sitting up in bed — the patient instinctively assumes this posture during paroxysms
• Pressure on the chest or painful side — the patient presses with both hands
• Open air
• Quiet, remaining still
• Gentle motion (for headache and some musculoskeletal pains)

Relationships

Complementary: Nux Vomica — the classical follow-up, particularly when the spasmodic state extends from the larynx into the digestive tract, or when an irritable, hypersensitive nervous condition emerges after the cough has cleared.

Compatible: Calcarea Carbonica — in tubercular constitutions where Drosera has cleared the acute paroxysm and a deeper constitutional remedy is needed; Pulsatilla — often follows Drosera well when residual loose cough with bland yellow expectoration remains; Veratrum Album; Gnaphalium.

Antidoted by: Camphora.

Compare:

• Belladonna — also a spasmodic cough remedy with a red face and a violent paroxysm, but Belladonna's cough is short and barking and worse from cold draughts, with throbbing carotids and hot dry skin. Belladonna lacks the after-midnight aggravation and the retching-vomiting termination.
• Ipecacuanha — spasmodic cough with constant nausea, no relief from vomiting, suffocative attacks with rattling in the chest. Ipecacuanha has more chest rattle; Drosera has a dry, deep, barking quality with retching at the end.
• Cuprum Metallicum — violent spasmodic cough relieved by sips of cold water, with marked cramps and convulsions. The Drosera cough is worsened by cold drinks.
• Coccus Cacti — whooping cough with thick tenacious mucus that hangs in strings, worse from warm room, better from cold drinks. The opposite cold-drink modality from Drosera.
• Spongia Tosta — dry, barking, sawing cough, croup, worse before midnight (where Drosera is worse after midnight). The midnight axis is a useful pivot in differentiating these two remedies.
• Hepar Sulphuris — croupy cough with loose rattle and great sensitivity to cold air, with a more chilly and touchy constitutional picture than Drosera.
• Causticum, Sepia, Arnica, Kali Carbonicum — when the marked feature is inability to expectorate. Drosera retches and vomits up what cannot be raised; these remedies hawk and strain and tire.
• Mephitis — pertussis with spasmodic cough so severe it produces vomiting, worse at night and after lying down. Very close to Drosera, but Mephitis lacks the laryngeal foreign-body sensation and the after-midnight time signature.

Clinical Uses

Whooping Cough and Pertussis

This is the indication that established Drosera in the materia medica. The picture is the one Hahnemann himself drew: paroxysms of deep, barking, breath-taking cough following each other so rapidly the child can scarcely breathe between them, ending in retching, vomiting of food, or a thread of bright blood from the nose. Worse after midnight, worse as soon as the head touches the pillow, worse from talking or laughing or warm rooms, better sitting up. The child often holds the sides of the chest during the paroxysm.

In my practice, a single dose of 200C is usually sufficient for a clearly indicated case; in deeper or recurrent cases 1M may be needed. Hahnemann's warning about not repeating Drosera too often holds. The case I remember most clearly was a four-year-old in his third week of pertussis, the family already exhausted, who took one dose at bedtime and slept through to morning for the first time. We gave nothing for a week and the paroxysms faded. Two weeks later, when a tickle returned, we repeated the same dose. That was enough.

Spasmodic Cough in Adults

The pediatric pertussis indication is the historical core, but the same pattern arises in adults under different names — post-viral spasmodic cough, irritant tracheitis, the lingering cough that follows a forgotten cold, the cough that develops in singers and clergymen after a strain. When the cough fits the modality picture — paroxysmal, worse after midnight, worse lying down, worse from talking or laughing, with retching at the end — Drosera answers it as faithfully in the adult as in the child. I see this particularly often in people who use their voices for a living. A teacher comes in three weeks after a cold, voice hoarse and rough, the cough triggered every time they try to lecture, paroxysms at night that wake the partner. The Drosera picture lays itself open in the consulting room.

Bronchitis

Bronchitis with deep, hoarse, barking cough, yellow expectoration sometimes streaked with blood, epistaxis from coughing, and vomiting of mucus or food at the end of the paroxysm. Chronic bronchitis in the elderly, especially when accompanied by the characteristic dry irritative tickle and the worsening after midnight, is well within Drosera's range. Murphy notes its particular value in the bronchitis of tubercular constitutions, where the patient is pale, emaciated, and tires easily.

Laryngitis and Hoarseness

Drosera leads the rubric for clergyman's sore throat and speaker's sore throat — deep, rough, scraping dryness in the fauces, voice hollow and toneless, requiring exertion to speak. The sensation of a crumb or feather in the larynx provokes a tickling cough. Difficulty swallowing solids from a sense of constriction. Hoarseness from prolonged use of the voice, or following a cold.

Post-Measles and Post-Influenza Cough

Drosera is a principal remedy for the cough that follows measles when it lingers, takes on a spasmodic character, and disturbs sleep with paroxysms after midnight. The same picture often presents weeks after influenza — fever and aches long gone, but the deep, barking, dry cough remains, breaking out in fits at night, sometimes ending in retching.

Featured in our guides

Drosera is featured in Best Homeopathic Remedies for Respiratory Issues.

Frequently Asked Questions

How is Drosera different from Spongia and Belladonna in spasmodic cough?

The midnight axis is the simplest differentiator. Spongia coughs worsen before midnight, often around 11 p.m., with a dry, sawing, croupy quality. Drosera coughs worsen after midnight, typically 2–3 a.m., with a deep, barking quality that ends in retching. Belladonna is brief and paroxysmal, with a hot red face and throbbing carotids, often during the early evening, and lacks the retching-vomiting termination characteristic of Drosera.

Why do practitioners give Drosera in a single dose rather than repeating it?

Hahnemann himself warned that Drosera in high potency should not be repeated often. The remedy acts deeply and for a long time when it is well-indicated, and repetition tends to confuse the case or produce aggravation. In my practice I generally give a single dose of 30C or 200C and wait — sometimes for days — before considering whether anything further is needed. If the paroxysms return after a clear interval of relief, the same dose may be repeated.

What does it mean that Hahnemann singled out Drosera in the Organon?

In his discussions of the homeopathic principle, Hahnemann drew on Drosera as a vivid example of the law of similars in action. Crude doses of the fresh plant had produced in healthy provers a deep, spasmodic, tubercular-seeming cough — the very kind of cough that, when the substance was attenuated and given to patients suffering from such a cough, was relieved. The historical significance is that Drosera was one of the cases through which Hahnemann publicly demonstrated that what a substance can cause, it can also cure, when given in dynamized form. The remedy is therefore one of the foundational illustrations of the principle of similarity rather than merely one entry among many.

Is Drosera suitable for any persistent cough?

No. The Drosera cough has a definite picture: spasmodic and paroxysmal, worse after midnight, worse on lying down, worse from talking or laughing, often ending in retching or epistaxis, with a sensation of foreign body or tickle in the larynx as the trigger. A persistent productive cough with rattling mucus, or a cough worse before midnight, or a cough relieved by lying down, points to other remedies. Match the modalities before prescribing.

References

1. Boericke, W. Pocket Manual of Homoeopathic Materia Medica. 9th ed. B. Jain Publishers, 2002. Drosera Rotundifolia.
2. Clarke, J.H. A Dictionary of Practical Materia Medica. B. Jain Publishers. Drosera Rotundifolia.
3. Murphy, R. Nature's Materia Medica. 3rd ed. Lotus Health Institute, 2006. Drosera Rotundifolia.
4. Phatak, S.R. Materia Medica of Homoeopathic Medicines. B. Jain Publishers. Drosera.
5. Hahnemann, S. Organon of the Medical Art. 6th ed. Discussions of Drosera as illustration of the homeopathic principle in pertussis.
6. Kent, J.T. Lectures on Homoeopathic Materia Medica. B. Jain Publishers, 2006. Drosera.
7. Allen, T.F. The Encyclopedia of Pure Materia Medica. B. Jain Publishers. Drosera Rotundifolia.