Acidum Tannicum: Haemorrhage and Mucosal Astringency

What Is Acidum Tannicum?

Acidum Tannicum is a homeopathic remedy prepared from tannic acid (tannin, C₇₆H₅₂O₄₆), a polyphenolic compound widely found in oak bark, galls, tea leaves, and many other plants. Tannins have been used historically as astringents in conventional medicine, tanning leather, and preserving foods. In homeopathy, the remedy is prepared through potentisation. Clarke includes Acidum Tannicum in the Dictionary of Practical Materia Medica, and Allen documents it in the Keynotes and Characteristics, though the proving is limited in extent.

Key Characteristics

• Passive haemorrhage from mucous membranes — dark, oozing, persistent bleeding
• Inflammation of the mouth, throat, and pharynx with rawness and dryness
• Constricting sensation in the throat as if drawn together
• Dryness of the mucous membranes without corresponding thirst
• Constipation with hard, dry stools and a dry rectal mucosa
• Skin conditions with a dry, contracted, constricted quality

Mental Picture

Clarke and Allen do not elaborate a strongly individualised mental picture for Acidum Tannicum. As with several of the lesser-proven acid remedies, the mental picture is not a primary differentiating feature. The remedy is studied through its physical keynotes and its relationship to the astringent action of tannic acid in the crude state.

Physical Picture

The dominant physical affinities are the mucous membranes and haemorrhage. The mucous membranes tend toward dryness, rawness, and constriction rather than the moist inflammation of some other remedies. Passive haemorrhage — dark, slow, and persistent — is the bleeding character. The throat has a drawn, constricted feeling. Constipation with dry, hard stools reflects the astringent action on the bowel mucosa. Skin conditions feature dryness and contracture rather than weeping or vesicular eruptions.

When Is It Considered?

Homeopaths may consider Acidum Tannicum when:

• Passive, dark haemorrhage from mucous membranes is the chief complaint
• Dryness and rawness of the throat and mouth with a constricting sensation are present
• Constipation with dry, hard stools and dry rectal mucosa is a feature
• Skin conditions show dryness and contracture rather than weeping eruptions
• The broader picture suggests an astringent remedy within the acid and haemorrhage groups

This article is for educational purposes only. Homeopathic remedies should be selected under the guidance of a qualified practitioner and do not replace medical evaluation.