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Materia Medica Viva Volume 3 – page 567

severe leg cramps and vomiting which is followed by a deathly unconsciousness.
Convulsions with so severe a stiffness that no joint can be moved. Twitchings, cramps, tetanic spasms. Hysteria; hysterical spasms, then exhaustion, and finally unconsciousness. Hysterical paralysis. Faintness in the morning with purple lips, coldness of the extremities, anxiety, and prostration.
A general sensitiveness pervades the remedy; he is sensitive to touch, light, odors, sound, and his surroundings – everything has to be in order around Arsenicum for him to find peace.
Arsenicum typically has acrid, thin, watery, offensive, putrid, but not profuse, discharges of the mucous membranes and skin. Should the discharges be profuse and thick, great relief is afforded the general symptomatology. Pernicious anemia, septic conditions. Hemorrhages that are black and offensive. Burning pains, like hot needles, which are ameliorated by warm applications.
Alternating complaints: different ailments replace each other at different times; for instance, stomach pains may arise as an arthritic condition subsides and vice versa.
Turning to the characteristic physical pathology of Arsenicum, we note a propensity for affections of the respiratory and digestive tract – the mouth, esophagus, stomach, and intestines, nose, larynx, bronchii and the lungs. Of course, Arsenicum is such a big remedy that it affects almost every part or system of the body. Although Arsenicum is not normally considered a right-sided remedy, there exists a preponderance of right-sided symptoms, notably the rhinitis, ovarian pains, and hepatic disorders. Arsenicum possesses a general tendency to malignancy in the sense of its frequent correspondence to both serious, aggressive diseases that progress to prostration and cancerous affections. With these characteristics in mind, symptoms of specific organ systems will be reviewed.
Sensitiveness of all senses is characteristic.
Oversensitive to any kind of disorder in the surroundings.
Vertigo
Vertigo on shutting eyes; as if would fall; vertigo when walking in open space.