Nitricum acidum

as H.C. Allen recorded it in Keynotes and Characteristics with Comparisons of Some of the Leading Remedies of the Materia Medica, 1899

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Keynotes

Nitric acid

Nitric Acid. H N O3.

Especially suited to thin persons of rigid fibre, dark complexions, black hair and eyes — the brunette rather than the blonde — nervous temperament.

Persons suffering with chronic diseases who take cold easily; are easily disposed to diarrhoea; rarely to those who suffer with constipation.

Old people with great weakness and diarrhoea.

Excessive physical irritability.

Pains : sticking, pricking as from splinters ; suddenly appearing and disappearing; on change of temperature or weather; during sleep; gnawing here and there as from ulcers forming.

Sensation : of a band around head, around the bones (Carb. ac., Sulph.) ; of a splinter in affected parts, ulcer, piles, throat, ingrowing toe nail, < on slightest contact.

Ailments : which depend on some virulent poison ; from mercury, syphilis, scrofula; in broken-down cachectic constitutions.

After continued loss of sleep, long-lasting anxiety; over-exertion of mind and body from nursing the sick (Coc.) ; anguish from the loss of his dearest friend; indifference; tired of life; sadness before menses.

Great anxiety about his disease; constantly thinking about his past troubles ; morbid fear of cholera (Ars.) ; depressed and anxious in the evening.

Irritable, headstrong; hateful and vindictive; inveterate, ill-willed, unmoved by apologies.

Hardness of hearing > by riding in carriage or train (Graph.).

Very sensitive to rattle of wagons over paved streets; headache from pressure of hat (Cal. p., Garbo, Nat.).

Ozsena : green casts from the nose every morning.

Diarrhoea : great straining but little passes, as if faeces remained and cannot be expelled (Alum) ; pain as if rectum or anus were torn or fissured (Nat. m.) ; violent cutting pains after stool, lasting for hours (Rat., Sulph. — during and after, Mer.).

Fissures in rectum; tearing, spasmodic pains during stool; lancinating, even after soft stools (Alumen, Nat., Rat).

Urine : scanty, dark-brown, strong-smelling, ‘dike horse’s urine;” cold when it passes; turbid, looks like remains of a cider barrel.

Ulcers : easily bleeding; in corners of mouth (Nat.) ; splinter-like pains, especially on contact (Hep.) ; zigzag, irregular edges; base looks like raw flesh; exuberant granulations ; after mercury or syphilis or both, engrafted on a scrofulous base.

Discharges : thin, offensive, acrid ; of a brown or dirty yellowish green color ; rarely laudable pus.

Haemorrhage : from bowels in typhoid or typhus (Crot., Mur. ac. ) ; after miscarriage or post-partum; from over-exertion of body; bright, profuse, or dark.

Cracking: in ears, on masticating; of the joints, on motion (Coc., Graph.).

Warts, condylomata: sycotic or syphilitic; large, jagged, pedunculated; bleeding readily on washing; moist, oozing; sticking pain (Staph., Thuja).

Affects especially the mucous outlets of the body where skin and mucous membrane join; mouth, nose, rectum, anus, urethra, vagina (Mur. ac.).

Inimical : to, Lachesis.

Resembles : Ars. in morbid fear of cholera.

Often difficult to distinguish from Men ; but is adapted to black-haired people, while Men is more useful in light-haired persons.

Relieves ailments resulting from abuse of mercury, especially if there be erethism; bad effects of repeated doses of Digitalis.

Follows well: Calc., Hep., Mer., Nat. c.. Puls, or Thuja; but is most effective after Kali c.

Aggravation. — Evening and at night; after midnight; contact; change of temperature or weather; during sweat; on waking; while walking.

Amelioration. — While riding in a carriage (reverse of Coc.).

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Cite this page. H.C. Allen. Keynotes and Characteristics with Comparisons of Some of the Leading Remedies of the Materia Medica. 3rd edition (1910). Philadelphia: Boericke & Tafel. Nitricum acidum — Keynotes, pp. 203–206. HomeopathyWorld, https://homeopathyworld.in/materia-medica/books/allen/nitricum-acidum. Published 1910: public domain in the US (before 1931) and in India (author died 1909). Replaces B. Jain's 2005 "rearranged and classified" edition (© the publisher), per the owner's decision of 13 Sep 2026. Reproduced as the author wrote it; a historical reference for students and practitioners, not medical advice.