The oil distilled from cinnamon bark.

Characters. - Yellowish when recent, gradually becoming red, having the odour and taste of cinnamon.

Composition. - Consists principally of cinnamic aldehyde, or hydride of cinnamyl, with other hydrocarbons, one of which, a camphor, is deposited at low temperatures, thus causing the change in colour. The oil has a specific gravity of from 1.025 to 1.050, so that it sinks in water. It is slightly laevulose.

Dose. - 1-5 min.

Preparations.

B.P.

Dose.

Spiritus Cinnamomi (oil 1, spirit 49)..........................................................................

1/2-1 fl. dr.

Acidum Sulphuricum Aromaticum (contains spirit of cinnamon)............................

5-30 min.

U.S.P.

Aqua Cinnamomi..........................................................................................................

indefinite.

Spiritus Cinnamomi......................................................................................................

5-15 min.

Acidum Sulphuricum Aromaticum.............................................................................

5-15 min.

Action and Uses. - Cinnamon is an aromatic carminative, and since it contains tannic acid slightly astringent. It is chiefly used in conjunction with other astringents, and from its agreeable taste is very frequently employed.

Coto Bark. Not officinal. - The bark of a tree imported from Bolivia.

Composition. - It contains an alkaloid, cotoin. Cotoin forms a pale yellow powder or minute crystals sparingly soluble in water, soluble in alcohol, ether, and chloroform.

Dose. - 1/2 to 2 gr. every two or three hours in mucilage or syrup. A solution of 1 part in 4 of acetic ether is recommended for hypodermic injection. Tincture of coto bark (1 in 10) may be used in doses of 10 min.

Action. - It appears greatly to increase intestinal absorption (p. 387).

Uses. - It is useful in gastric and intestinal catarrh, in infantile diarrhoea, and in the diarrhoea of phthisis. It is said also to check salivation and the night sweats of phthisis.

Paracoto Bark. Not officinal. -Contains an alkaloid, paracotoin, similar in its actions and uses to cotoin, but less powerful.