Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Carbonicum in traditional homeopathic usage, not approved by the FDA.
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Tension in chest during inspiration.
Pressure on chest.
Shootings in chest and sides of chest.
Continual coldness in l. side.
Violent and anxious palpitation of heart, esp. on going upstairs, or at night, when lying on the l. side.
Painful cracking in region of heart.
Pulse accelerated mostly at night, with ebullitions.
Shortness of breath, sometimes with difficult respiration.
Dyspnoea and shortness of breathing, occasioned by tension of chest.
Short cough, with rattling in chest.
Hoarseness and roughness in chest, with coryza, febrile shivering, and scraping and painful cough.
Continual catarrh, with coryza and cough, excited by least current of air or slightest chill, and disappearing only when perspiration supervenes.
Cough excited by tickling in throat.
Violent and dry cough on passing from cold to hot temperature.
Cough, with expectoration which has a salt taste, or which consists of greenish and fetid pus.
Expectoration of small substances, with rattling of mucus in chest.
Cough, with expectoration of blood.≡ more ...