Not officinal. - The leaves and shoots of Myrtus Chekan (Eugenia Chekan). Chili.

Characters. - They resemble some buchu leaves (Barosma betulina), but have the margin entire and a different smell.

Composition. - They contain a volatile oil resembling that of eucalyptus, a volatile alkaloid - chekanine - and tannin.

Action and Uses. - It is antiseptic, tonic, expectorant, and diuretic. The expressed juice diluted with water has been used as a lotion in inflammation of the eye, and a decoction of the bark as an astringent in dysentery. It is chiefly used in catarrh of the mucous membranes, especially those of the bronchi and bladder. It appears to be very useful in cases of bronchitis with thick purulent expectoration, also in cases of phthisis. The oil of myrtle appears to have a similar action.

Pbeparations, not Officinal.

Dose.

Infusum Chekan ( 1part leaves to 10 of boiling water) ........................................

Extractum „ Fluidum (prepared like Ext. Cinchonae Fluid.,U.S.P.)..

.1-3 fl. dr.

Syrupus " (1 part leaves to 2 of syrup) .........................................

Oleum Myrti. Oil of Myrtle. Not officinal. - A volatile oil obtained from the leaves of Myrtus communis.

Dose. - 0.15 gm. in capsules.

Action and Uses. - It has an antiseptic action, and may be used in cases of foul ulcers and foetid discharges from mucous passages, as in otorrhoea. It is not a sufficiently powerful irritant to affect the unbroken skin, but does so when the epidermis is removed. It has been used externally as a rubefacient in rheumatism. It causes warmth and increased flow of saliva in the mouth; and in small doses (0.06-0.09 gm.) appears to aid digestion. In larger doses it acts as an irritant, causing nausea, flatulent distension, headache, and languor. It is excreted in the urine, to which it gives a smell like violets, and like copaiba gives a precipitate when nitric acid is added to the urine. Like copaiba it may be used as an expectorant in chronic bronchitis with profuse expectoration, in phthisis, and in chronic inflammation of the bladder or urethra. (Cf. p. 446.)