Below are the main rubriks (i.e strongest indications or symptoms) of Kali Nitricum in traditional homeopathic usage, not approved by the FDA.
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Heart; Pulse weak, SMALL, thready
Violent stitch in precordia, and beating of heart.
Dry, morning cough, with pain in chest and bloody expectoration
Bronchitis, with sharp, short, dry, hacking cough
ASTHMA, with excessive dyspnoea, nausea, dull stitches, and burning in chest
Dyspnoea so great that breath cannot be held long enough to drink, though thirsty
Chest feels constricted
Oppression worse in morning
Expectoration of clotted blood, after hawking mucus
Acute exacerbations in phthisis; congestion of lungs
Spasmodic croup; paroxysm of crowing
Laryngeal diphtheria.≡ more ...