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Materia Medica Viva Volume 2 – page 277

AMMONIUM CAUSTICUM
English: Water of ammonia; Solution of ammonia; Ammonia; Spirits of Hartshorn;
ΝΗ,ΟΗ
French: Ammoniaque liquide
German: Wasseriges ammonium
THE ESSENTIAL FEATURES
This is yet another remedy that has been impartially proved and is seldom used. It is a deep-acting remedy, like all the Ammonium’s, and when more information about it has been accumulated, 1 am sure it will prove to be an important remedy. It is a remedy that should be tried in cases of aphonia when Causticum has been given and failed. It will not be clear whether the aphonia is the result of paralysis of the vocal cords or an inflammation, but it will appear as if paralysis is the etiology.
The indicating symptom of this remedy is a weak voice, so weak that the patient can hardly be heard; the voice is almost indistinct.
The effort that the patient makes in order to speak fatigues him, and at the same time he feels pain in the chest. The fatigue felt while talking is similar to that of Stannum, and Ammonium causticum should be considered in cases of tuberculosis because of its tendency to affect the respiratory system and to produce hemorrhages.
Interestingly, there seems to be a paralysis of the esophagus which causes the patient to feel that he cannot swallow water, even though he is very thirsty. In this respect this remedy very much resembles Causticum with its tendency for local paralysis. There is also marked exhaustion and muscular debility, indicating that this remedy should be considered for neuromuscular diseases, especially when one of the primary presenting symptoms is difficult deglutition.
These patients suffer oppression of the chest with anguish; they feel that they cannot take a breath, that they are suffocating. There is great difficulty in breathing. They are aroused from sleep with a suffocative feeling, much like Lachesis. Respiratory weakness and momentary paralysis of the vagus nerve are quite characteristic of this remedy.
Another important aspect of this remedy is its tendency to affect the epithelium of the upper digestive tract. The tongue, the palate, and