700. Opium
Opium is a stimulant, narcotic, and anodyne.
Used externally
it acts almost as well as when taken into the stomach, and without affecting the head or causing nausea. Applied to irritable ulcers in the form of tincture, it promotes their cure, and allays pain. Cloths dipped in a strong solution, and applied over painful bruises, tumours, or inflamed joints, allay pain. A small piece of solid opium stuffed into a hollow tooth relieves toothache. A weak solution of opium forms a valuable collyrium in ophthalmia. Two drops of the wine of opium dropped into the eye acts as an excellent stimulant in bloodshot eye; or after long-continued inflammation, it is useful in strengthening the eye. Applied as a liniment, in combination with ammonia and oil, or with camphorated spirit, it relieves muscular pain. When combined with oil of turpentine, it is useful as a liniment in spasmodic colic.
Used internally
, it acts as a very powerful stimulant: then as a sedative, and finally as an anodyne and narcotic, allaying pain in the most extraordinary manner, by acting directly upon the nervous system. In acute rheumatism it is a most excellent medicine when combined with calomel and tartrate of antimony; but its exhibition requires the judicious care of a medical man.
Doses of the various preparations.
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Confection of opium
, from five grains to half a drachm;