Below are the main rubriks (i.e strongest indications or symptoms) of Natrum Sulphuricum in traditional homeopathic usage, not approved by the FDA.
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FEVER AND CHILL
Waking at night with chilliness, shaking and chattering of teeth, with anguish and thirst.
Shiverings with coldness, esp. in evening, or at night, sometimes with anguish, quaking, and chattering of teeth, generally without thirst.
Coldness and shuddering with thirst.
Internal coldness, with stretching and yawning.
In morning, after a walk, shivering and shaking, and coldness, with heat in head, and yellowness of face.
Perspiration in morning.
During shivering fit, heat in forehead and hands.
Dry, general heat, in the afternoon.
Sudden flashes of heat towards evening.
Profuse sweat, at night.≡ more ...