Quinidinum

Quinidine; (S)-[(2R,4S,5R)-5-ethenyl-1-azabicyclo[2.2.2]octan-2-yl](6-methoxyquinolin-4-yl)methanol; quinidine sulfate / gluconate (commercial salts) · Quinidine, Quinidinum, Quinid. (homeopathic abbreviation); marketed historically as Quinaglute, Quinidex, Cardioquin (allopathic)

Modern MM

A cinchona-alkaloid remedy whose sphere of action is inferred chiefly from toxicology, not from a formal proving: periodicity, the auditory/aural disturbances of cinchonism (tinnitus, roaring, deafness), vertigo, and cardiac irregularity with palpitation. Closely allied to China and the Chininum salts.

Key symptoms

No formal proving keynotes exist for Quinidinum. The characteristic indications are toxicological (cinchonism) and analogical to China / Chininum sulphuricum: tinnitus with roaring and ringing in the ears, with impaired hearing progressing to deafness (cf. Chininum salicylicum for Meniere-type tinnitus and deafness); vertigo and headache; periodicity; palpitation and irregular, intermittent heart action with a tendency to syncope; nausea, vomiting and diarrhoea; flushed, sweating skin. These are inferred under the Law of Similars and must not be presented as proving keynotes.

Worse (aggravation)

Not established by proving. Toxicologically, symptoms follow dosing and may appear after even a single dose; no reliable homeopathic modalities exist.

Better (amelioration)

Not established. No proving-derived ameliorating modalities are on record for Quinidinum.

Manohar V Nagaiah

Materia Medica of Modern Homeopathic Medicine · 2026

Quinidine, Quinidinum, Quinid. (homeopathic abbreviation); marketed historically as Quinaglute, Quinidex, Cardioquin (allopathic)

Source & Nature

Quinidinum is the homeopathic potentisation of quinidine, a cinchona alkaloid and the dextrorotatory diastereomer of quinine (formula C20H24N2O2, MW 324.42, CAS 56-54-2, PubChem CID 441074). In allopathic medicine quinidine is a Class Ia antiarrhythmic that blocks the cardiac sodium channel (Nav1.5) use-dependently, also blocks potassium channels (including hERG) and has antimuscarinic and alpha-1 actions, slowing conduction and prolonging the QT interval.

It derives from the same bark (Cinchona spp.) that yields the great homeopathic polychrest China and the Chininum salts, to which Quinidinum is the nearest chemical relative.

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