Nitric Acid

Latin name: Acidum nitricum

Short name: Nit-ac

Common name: Nitric Acid | Aqua Fortis | Strong Acid | Acidum Nitricum | Hydrogen Nitrate

Primary miasm: Syphilitic   Secondary miasm(s): Psoric, Sycotic, Tubercular, Cancer

Kingdom: Minerals

Family: Inorganic Acid

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  • Symptomatology
  • Remedy Information
  • Differentiation & Application

A powerful corrosive acid composed of nitric oxide and water. In homeopathy, it is prepared by potentising dilute nitric acid. The acid is a colourless, highly oxidising liquid that turns yellow on decomposition.

Widely used in industry for explosives (e.g. TNT), dyes, fertilisers, and chemical synthesis. Also used historically in etching and metallurgy.

First proved by Hahnemann and published in Chronic Diseases. Later confirmed by Hering, Allen, and Clarke through clinical observation.

  • Mucous membranes – especially mouth, rectum, genitals
  • Skin – fissures, ulcers, warts
  • Urinary organs – bladder, urethra
  • Digestive tract – stomach, anus
  • Mind – irritability, unforgiving nature, anxiety about health
  • Riding in a carriage (especially for complaints of general malaise)
  • Warm coverings
  • Resting the affected part
  • After meals (some symptoms)
  • Drawing up limbs (in abdominal complaints)
  • Cold air, cold weather
  • Touch (especially painful ulcers or fissures)
  • At night
  • Pressure
  • Motion
  • Slightest jar or noise
  • Emotional aggravations (anger, humiliation)
  • Mercurius – Also syphilitic and ulcerative, but Merc. is more moist, changeable, and offensive; Nit-ac. is sharper and more irritable
  • Thuja – Warts and sycosis; more suppressed and secretive; Nit-ac. more ulcerative, painful
  • Sulphur – Also offensive discharges, but more reactive, robust, and open
  • Hepar sulphuris – Sensitive to touch and pain, but more suppurative; Nit-ac. more ulcerative and indurated
  • Kali bichromicum – Deep ulceration and stringy discharges, but more thick, ropy; Nit-ac. more painful and splintery
  • Complementary: Natrum muriaticum, Arsenicum album
  • Antidotes: Camphora, Opium
  • Follows well: Mercurius, Arsenicum
  • Precedes well: Thuja, Lycopodium, Hepar sulphuris

Nitric acid reflects deep erosion—of tissues, relationships, and inner peace. It is suited to patients who have suffered indignity, betrayal, or humiliation and now live with inner bitterness. They are precise, intense, and unyielding—physically and emotionally. Their health fears are not neurotic but often rooted in real suffering. The splinter-like pains symbolise a psyche torn by inner injury and unresolved trauma.

  • First remedy to consider in fissures, ulcers, and painful warts
  • Useful in constipation with knife-like rectal pain
  • Valuable in post-syphilitic conditions with ulceration and foul discharges
  • Think of it in patients with bitterness, hypercriticism, and fear of incurability
  • Great in chronic cystitis with cutting pain and offensive urine

Mind

  • Anger, lasting
  • Anxiety about health
  • Unforgiving
  • Suspicious, easily offended

Rectum

  • Fissures, painful
  • Splinter-like pain during stool
  • Constipation, with soft stool
  • Haemorrhoids, bleeding, painful

Skin

  • Cracks, fissures, painful
  • Warts, bleeding, hard
  • Ulcers, indurated base
  • Splinter-like sensation

Mouth

  • Ulcers, painful
  • Tongue, cracked
  • Salivation, offensive

Urinary

  • Urine, offensive, horsey odour
  • Urethra, burning pain
  • Stricture, painful

Generalities

  • Worse cold
  • Worse night
  • Splinter-like pain
  • Ulceration, chronic

Samuel Hahnemann – Chronic Diseases: Original proving and chronic indications

C. Hering – Guiding Symptoms: Detailed local symptoms and keynotes (splinter pains, urine odour)

James Kent – Lectures on Homoeopathic Materia Medica: Psychological themes and syphilitic miasm discussion

John Henry Clarke – Dictionary of Practical Materia Medica: Expanded physical symptoms, especially for mouth, skin, and rectum

William Boericke – Materia Medica: Condensed clinical essentials, modality notes, and mind section

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