... 1/2 grain applied to a mucous membrane or injected hypodermically may give rise to alarming symptoms. These are intense pallor, faintness, giddiness, dilatation of pupils, paroxysmal dyspnoea, rapid, intermittent, and weak pulse, nausea and vomiting, intense prostration verging on collapse, and convulsions. The patient may recover if allowed to remain in a recumbent position, but stimulants by mouth—e.g., ammonia—and the hypodermic injection of brandy ... — Aids to Forensic Medicine and Toxicology • W. G. Aitchison Robertson
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