Magnesium carbonicum
Magnesium carbonate · Magnesium carbonate. · Mineral
Mag. carb. is best suited to long-suffering people who feel worn down and who crave quiet calm, being highly sensitive to noise or touch. They are peacemakers who cannot bear disharmony, although when pushed their temper may erupt, especially in the case of children.
A key symptom associated with Mag. carb. is acidity in the digestive system with sour-smelling stools and perspiration, and poor digestion of milk. The remedy may be used for diarrhea or constipation with abnormal, undigested, discolored, fatty stools. It may also be prescribed for exhaustion or chronic fatigue syndrome with swollen glands, lax muscles, and susceptibility to hernias.
Key symptoms
- Whole body smells sour; tendency to boils in children
- Intense neuralgic pains; sensitive to least touch, cold winds, noise
- Sour eructations and vomiting of bitter water
- Toothache worse at night, during pregnancy, cold and quiet; must move about
- Tearing facial pain worse quiet; must move about
- Diminished hearing; numbness of outer ear; subdued tinnitus
- Stool green, frothy, like frog-pond scum; sour-smelling in children
- Effects of shock, blows, mental distress with nerve prostration
Worse (aggravation)
Better (amelioration)

Carbonate of Magnesia (MAGNESIA CARBONICA)
Gastro-intestinal catarrh, with marked acidity. Often used with advantage for complains arising in people who have been taking this drug to sweeten the stomach. Is frequently indicated in children; whole body smells sour, and disposed to boils. Broken-down, "worn-out" women, with uterine and climacteric disorders. With numbness and distension in various, parts and nerve prostration. Sensitive to the least start, noise, touch, etc. Affection of the antrum of Highmore. Effects of shock, blows, mental distress. Sense of numbness; nerve prostration; tendency to constipation after nervous strain; sensitive to least touch, it causes starting, or cold winds or weather or from excess of care and worry with constipation and heaviness. Intense neuralgic pains.
Head
Sticking pain in the side of the head on which he lies, as if the hair was pulled; worse, mental exertion. Itching of scalp worse in damp weather. Pain above margin of right orbit. Blank motes before eyes.
Ears
Diminished hearing. Deafness; comes suddenly and varies. Numbness of outer ear. Feeling of distention of middle ear. Subdued tinnitus.
Face
Tearing pain in one side; worse; quiet; must move about. Toothache, especially during pregnancy; worse at night; worse, cold and quiet. Teeth feel too long. Ailments from cutting wisdom teeth (Cheiranthus). Pain in malar bone, worse during rest, night. Swelling of malar bone with pulsating pain, worse exposure to cold wind.
Mouth
Dry at night. Sour taste. Vesicular eruption; bloody saliva. Sticking pain in throat; hawking up fetid, pea-colored particles.
Stomach
Desire for fruit, acids, and vegetables. Eructations sour, and vomiting of bitter water. Craving for meat.
Abdomen
Rumbling, gurgling. Dragging towards pelvis. Very heavy; contractive, pinching, pain in right illiac region.
Stool
Preceded by griping, colicky pain. Green, watery, frothy, like a frog-pond's scum. Bloody mucous stools. Milk passes undigested in nursing children. Sour, with tenesmus (Rheum). Constipation after mental shock or severe nervous strain.
Female
Sore throat before menses appear. Before menses, coryza and nasal stoppage. Menses too late and scanty, thick, dark, like pitch; mucous leucorrhœa. Menses flow only in sleep; more profuse at night (Amm m), or when lying down; cease when walking.
Respiratory
Ticking cough, with salty, bloody expectoration. Constrictive pains in chest, with dyspnœa. Soreness in chest during motion.
Extremities
Tearing in shoulders as if dislocated. Right shoulder painful, cannot raise it (Sang). Whole body feels tired and painful, especially legs and feet. Swelling in bend of knee.
Skin
Earthy, sallow and parchment-like; emaciation. Itching vesicles on hands and fingers. Nodosities under skin. Sore; sensitive to cold.
Fever
Chilly in evening. Fever at night. Sour, greasy perspiration.
Sleep
Unrefreshing; more tired on rising than on retiring.
Modalities
Worse, warmth of bed; change of temperature; cold wind or weather; every three weeks; rest. Better, warm air; walking in open air.
Relationship
Antidotes: Ars; Merc.
Complementary: Cham.
Compare: Rheum; Kreos; Aloes; Cheiranthus-Wall flower --(deafness, otorrhœa, nose stopped up at night from irritation of cutting wisdom-teeth).
Dose
Third to thirtieth potency.

This remedy has only been partially proved, and comes to us now as Hahnemann left it.
The mental symptoms and symptoms of some portions of the body and particulars have not been fully brought out. The remedy really needs reproving with high potencies upon sensitive provers that the finer shades may be understood. I would not speak of it but for the fact that it relates to a class of cases so very important that you will not be able to get along without it. It is related to the older and deeper psoric sickness. It is deep acting and long acting and permeates the economy as thoroughly as Sulphur.
General features
Some of the most striking general features are: Amelioration from motion; desire for open air, yet very sensitive to cold air; wants to be covered during all stages of fever; daily evening fevers; symptoms recurring every twenty-one days. Sensation of heat and even sweat from eating and drinking warm things; evening thirst.

Magnesiæ carbonas levis. Light carbonate of magnesium of B. P. Magnesia carbonate 3(MgCO3) Mg(HO)2. 4H2O. Trituration.
Clinical
Antrum of Highmore, affections of. Ascarides. Catarrh. Constipation. Cornea, opacities of. Cough. Deafness. Debility. Diarrhœa. Dyspepsia. Eyes, inflammation of. Hernia. Menorrhagia. Menstruation, delayed. Metrorrhagia. Nervousness. Neuralgia. Neurasthenia. Pregnancy, nausea of; toothache of. Spleen, pain in. Taste, disorded. Tinnitus. Toothache. Tumours.
Characteristics
Mag. c. is the leading partner in the well-known "Pulv. Rhei Co." of the B. P., still better known as "Gregory's Powder," one of the terrors of an allopathic nursery. The proportions are: Mag. c., six parts; Rhubarb powder, two parts, and Ginger powder one part. A curious point about this mixture is that Mag. c. and Rheum are antidotal in Homœopathic practice, both having much acidity, and green, sour stools. "Fluid Magnesia" (Liquor Magnesiæ Carbonatis), a much more palatable dose, as my early …

Carbonate of Magnesia. (MgCO3,3H2O.)
For persons, especially children, of irritable disposition, nervous temperament (Cham.); lax fibre; sour smell of whole body (Rheum). The whole body feels tired and painful especially the legs and feet; aching, restless. Spasmodic affections of stomach and intestines (Col., Mag. p.), increased secretion from mucous membranes. Unrefreshing sleep, more tired on rising than when retiring (Bry., Con., Hep., Op., Sulph.). Inordinate craving for meat in children of tuberculous parentage. Heartburn; sour, belching, eructations, taste and vomiting; of pregnancy. Pains: neuralgic, lightening-like, < left side (Col.); insupportable during repose, must get up and walk (Rhus); toothache, during pregnancy < at night. Pain on vertex as if the hair were pulled (Kali n., Phos.). Menses: preceded by sore throat (Lac c.), labor-like pain, cutting colic, backache, weakness, chilliness; flows only at night or when lying, ceases when walking (Am. m., Kreos., - rev. or Lil.); acrid, dark, …

Abdomen
Griping, cutting rumbling in the whole abdomen, followed by thin, green stools, without tenesmus, stool <.
Anus and Stool
Green, watery, frothy stools, with green scum like that of a frog pond.
Female Sexual Organs
Menses flows only at night, or when lying, cease when walking.

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Acid dyspepsia; from milk, which sours; from cabbage, potatoes and other gross food.
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Diarrhoea, especially of children; stools green and frothy like the scum of a frog pond; griping pains, sour eructations.
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Neuralgia, especially of the face; lightning-like pains, usually worse at night; great restlessness, must get up and walk about.

Phatak's chapter on Magnesium carbonicum is available in the app.
Read Phatak in the appClassical texts are in the public domain. Educational reference only — not medical advice.