Calcarea carbonica — carbonate of lime, prepared from the middle layer of the oyster shell — is what Boericke calls "this great Hahnemannian anti-psoric... a constitutional remedy par excellence." It is also the remedy students learn to recognise fastest, because Boericke handed down a five-word formula that has never been improved on:
The Calcarea patient is fat, fair, flabby and perspiring and cold, damp and sour.
Underneath that description sits a single mechanism. "Impaired nutrition being the keynote of its action, the glands, skin, and bones being instrumental in the changes wrought." The body takes in food and fails to build with it. Boger's phrase captures the consequence exactly: the patient "grows fat, but not strong."
This guide profiles the remedy for clinical study from Boericke's Materia Medica, Clarke's Dictionary, Boger's Synoptic Key and Lippe's Keynotes. The originals can be read in full — Clarke's Calcarea carbonica, Boericke's Calcarea carbonica and Kent's Calcarea carbonica — through Similia's free digital materia medica.
The Calcarea Carbonica Constitutional Type
Boericke's fuller description names the temperament: "persons of scrofulous type, who take cold easily, with increased mucous secretions, children who grow fat, are large-bellied, with large head, pale skin, chalky look, the so-called leuco-phlegmatic temperament."
Boger's version adds the sweat: "Fat, flabby blondes, who sweat easily, < on head or chest; during sleep." And it adds the developmental failure that makes the remedy so important in paediatrics: "faulty bony development. OPEN FONTANELLES. Tardy teething and walking. Scrofula. Rickets. Curvatures."
Two constitutional details are worth memorising because they are so easy to ask about. First, the head sweat: "much perspiration, wets the pillow," and Boericke repeats it in the fever section — "sweat over head in children, so that pillow becomes wet." Second, the feet: "cold, damp feet; feel as if damp stockings were worn."
The remedy is profoundly cold. Boger: "Cold, moist air chills through and through. Takes cold easily; in chest." Boericke adds "affections caused by working in water" and "deafness from working in water" — occupational damp is a genuine causation here.
Everything the patient produces is sour. Boger: "PROFUSE, OFTEN SOUR DISCHARGES, stools, sweats, odor of body, saliva." Boericke gives sour taste, sour eructations, sour vomiting, sour stool and sour foot sweat.
Mental and Emotional Picture
Apprehension. Boericke's opening word, and the mental core: "Apprehensive; worse towards evening; fears loss of reason, misfortune, contagious diseases." Lippe's phrasing is more precise about the mechanism: "she fears she will lose her understanding and that persons will observe her confusion of mind." The fear is not simply of madness but of being seen to be losing grip.
Fear of being observed. Boger lists it among the fears alongside disease, misery, disaster and insanity. This is the socially visible edge of the same anxiety.
Forgetfulness and confusion. "Forgetful, confused, low-spirited." Boger: "Forgetful; learns poorly... Confused; misplaces words." In a school-age patient this is often the presenting complaint.
Obstinacy. Boericke lists it plainly, and it sits oddly alongside the apprehension — but the combination is real and recognisable. The Calcarea child is timid about the world and immovable about their own routine.
Aversion to exertion. "Averse to work or exertion," with the memorable physical marker: "slight mental effort produces hot head." Boger's "hot head from mental exertion" is the same observation.
Sleeplessness from crowding ideas. "Ideas crowding in her mind prevent sleep," with night terrors, "dreams of the dead," and the specific "same disagreeable idea always arouses from light slumber."
Physical Affinities
Bones and development. Open fontanelles, delayed dentition, curvature of the dorsal vertebrae, rickets, and children "late in learning to walk." Boericke notes Calcarea "is a definite stimulant to the periosteum."
Glands. Swelling of the tonsils, submaxillary, cervical, inguinal and mesenteric glands. Boger capitalises "ENLARGED GLANDS; cervical, mesenteric," and Boericke lists goitre and parotid fistula.
Stomach and appetite. The cravings are among the most-used in the materia medica: "craving for indigestible things — chalk, coal, pencils; also for eggs, salt and sweets," set against "aversion to meat, boiled things" and "dislike of fat." Milk disagrees. There is a distinctive local sign: "swelling over pit of stomach, like a saucer turned bottom up" — Boger's "STOMACH LIKE AN INVERTED SAUCER."
Respiratory. The ascent modality lives here: "suffocating spells; tightness, burning and soreness in chest; worse going upstairs or slightest ascent, must sit down." Boericke adds "gets out of breath easily," "painless hoarseness; worse in the morning," and a tickling night cough. Boger's "everything makes him short of breath" is the general form.
Head. "Sense of weight on top of head. Headache, with cold hands and feet... icy coldness in, and on the head, especially right side." Vertigo on ascending and on turning the head. Boger: "BIG HEAD, WITH LARGE, HARD ABDOMEN" — the classic paediatric silhouette.
Eyes. "Chronic dilatation of pupils," spots and ulcers on the cornea, easy fatigue of the eyes, and "dimness of vision, as if looking through a mist."
Female. Menses "too early, too profuse, too long, with vertigo, toothache and cold, damp feet; the least excitement causes their return." Milky leucorrhoea. Boericke notes "increased sexual desire; easy conception," and, unusually, "sterility with copious menses."
Back and extremities. "Pain as if sprained; can scarcely rise; from overlifting." Arthritic nodosities; swelling of joints, especially the knee; burning of the soles; "sour foot-sweat." Boger adds "easily sprained" as a general.
Stool. "Constipation; stool at first hard, then pasty, then liquid" — a precise sequence. Alternatively the child's diarrhoea of undigested food, fetid, "with ravenous appetite." Boger: "chalky, gray or green, watery stools."
Nose and ears. Two occupational and constitutional markers sit here. Boericke records "takes cold at every change of weather," with nasal polypi and "swelling at root of nose"; and, in the ears, "deafness from working in water" alongside polypi "which bleed easily" and scrofulous inflammation "with muco-purulent otorrhoea, and enlarged glands." The polyp tendency recurs — Boger lists "polypi; nasal, uterine" among the general features.
Skin. "Unhealthy; readily ulcerating; flaccid. Small wounds do not heal readily. Glands swollen." Boericke adds nettle rash "better in cold air" — a rare amelioration from cold in an otherwise intensely chilly remedy — together with warts on the face and hands, chilblains, boils and petechial eruptions. Boger's "skin cold, like a snake" is the tactile impression.
Sleep. "Ideas crowding in her mind prevent sleep. Horrid visions when opening eyes. Starts at every noise; fears that she will go crazy... Frequent waking at night. Same disagreeable idea always arouses from light slumber. Dreams of the dead." Boger simply writes "Nightmare. Sleepless; from rush of ideas." Night terrors in a large-headed, sweaty-scalped child are a classical Calcarea presentation.
Key Modalities
Worse from:
- Exertion, mental or physical; ascending stairs or any slight climb
- Cold in every form — raw air, wet, bathing, washing, cooling off, change of weather
- Working in water; moist air; wet weather
- During the full moon — an unusual periodicity Boericke records explicitly
- Dentition; puberty
- Pressure of clothes; milk
- Standing; on awaking; from fasting
- Evening and after midnight
Better from:
- Dry climate and dry weather
- Lying on the painful side
- Rubbing; drawing the limbs up; lying on the back
- Darkness
The single most productive pairing is worse ascending with profuse head sweat during sleep. Neither is common; together in a chilly, flabby, sour patient they carry the prescription.
Keynote Symptoms
- Fat, fair, flabby, cold, damp and sour
- Profuse head sweat during sleep, wetting the pillow
- Craving for eggs, and for chalk, coal, pencils and other indigestible things
- Aversion to meat; dislike of fat; milk disagrees
- Worse ascending; breathless on the slightest climb
- Cold, damp feet, as if wearing wet stockings
- Open fontanelles; tardy teething and late walking
- Grows fat, but not strong
- Apprehensive; fears loss of reason and being observed in it
- Slight mental effort produces a hot head
- Icy coldness in and on the head, especially the right side
- Stomach swollen like an inverted saucer
- Chill at 2 p.m., beginning internally in the stomach region
- Worse during the full moon; worse from working in water
Clinical Applications
Failure to thrive and developmental delay. The central paediatric indication: large head, open fontanelles, big hard abdomen, thin limbs, late teething and walking, sweaty head at night, recurrent colds.
Recurrent respiratory infection. "Takes cold at every change of weather," settling in the chest, with tickling night cough and painless morning hoarseness.
Glandular enlargement. Cervical and mesenteric glands, tonsils, goitre — in a chilly, damp, scrofulous constitution.
Exhaustion from overwork. Boericke names "a jaded state, mental or physical, due to overwork" and "loss of appetite when overworked," with the hot head from slight mental effort.
Menstrual disorders. Early, profuse and prolonged menses with vertigo, toothache and cold damp feet, returning on the least excitement.
Rheumatic and joint complaints. Arthritic nodosities and joint swelling, especially of the knee, "as after exposure to wet," with sprained-feeling pains from overlifting.
Chronic constipation or children's diarrhoea. Either the hard-then-pasty-then-liquid sequence, or fetid undigested stool with a ravenous appetite.
Anxiety states. Apprehension worse toward evening, fear of losing one's reason, crowding thoughts preventing sleep, night terrors.
Differential Diagnosis
Calcarea vs. Silicea. Both are chilly, scrofulous, head-sweating constitutions in slow-developing children, and Boericke lists Silicea as complementary and as following Calcarea well. Calcarea is fat, fair and flabby with sour discharges and cravings for eggs and chalk. Silicea is thin, fine and undernourished with acrid foot sweat, stubborn suppuration and want of grit.
Calcarea vs. Sulphur. Boericke draws the line himself: Sulphur "differs in being worse by heat, hot feet." Calcarea is cold, damp and wants to be wrapped; Sulphur is hot, throws off the covers and puts the feet out of bed. The sequencing rule matters too — Calcarea is useful after Sulphur where the pupils remain dilated, but Sulphur should not be given after Calcarea.
Calcarea vs. Pulsatilla. Boericke notes Calcarea is indicated "when Pulsatilla failed in school girls." Both are mild and chilly-natured, but Pulsatilla is thirstless, changeable and craves open air and consolation; Calcarea is apprehensive, obstinate, thirsty for cold drinks and worse from any exertion.
Calcarea vs. Baryta carbonica. Boger lists Baryta carb as both complementary and related. Baryta carb has the same slow development with glandular swelling but adds marked backwardness, timidity and a characteristic swollen upper lip; Calcarea's intellect is intact even where learning is poor.
Calcarea vs. Lycopodium. Complementary in Boericke's list. Lycopodium is the thin, gassy, right-sided, 4–8 p.m. patient with anticipatory anxiety; Calcarea is fat, damp, cold and apprehensive about losing control.
Repertorisation Tips
These rubrics carry Calcarea carbonica in high grade:
- Generalities; ASCENDING; agg. — one of the most reliable generals
- Head; PERSPIRATION; scalp, of; sleep, during — the pillow-wetting sweat
- Generalities; FOOD and drinks; eggs; desires
- Generalities; FOOD and drinks; indigestible things; desires and chalk; desires
- Generalities; FOOD and drinks; fat; aversion and meat; aversion
- Mind; FEAR; insanity, of losing his reason — with Lippe's observed-confusion nuance
- Mind; FEAR; observed, of her condition being
- Feet; COLDNESS; damp
- Generalities; MOON; full moon; agg.
- Teeth; DENTITION; difficult and Extremities; WALKING; late learning to
- Generalities; WATER; working in; agg.
- Chill; TWO p.m.
Anchor on the constitutional formula, then confirm with two generals — worse ascending, head sweat during sleep — plus one food symptom. Calcarea separates from Silicea on build and from Sulphur on thermal state. Our beginner's guide to repertorisation sets out the method in more detail.
Deepening Your Study
- Boericke gives the fat-fair-flabby formula, the nutrition mechanism and the practical sequencing rules with Sulphur and Pulsatilla
- Boger's Synoptic Key supplies "grows fat, but not strong" and the paediatric silhouette in the fewest words
- Clarke's Dictionary holds the fullest proving and clinical compilation
- Lippe's Keynotes preserves the finest version of the mental symptom — the fear of being observed in one's confusion
- Kent's Lectures develop the constitutional picture and the weakness of reaction that underlies it
You can read all of these side by side for any remedy through Similia's free digital materia medica. To place Calcarea among its peers, see the guide to the essential polycrest remedies, or read how materia medica and repertory work together in case analysis.
