A volatile oil distilled from the leaves of Melaleuca minor, B.P. (M. Cajuputi, U.S.P.; M. Leucodendron). East Indies.

Characters. - Pale bluish-green, transparent. Odour strong and agreeable; taste, warm and aromatic, leaving a sensation of coldness in the mouth.

Impurity. - Copper, added to preserve the fine green colour which the oil possesses when newly distilled or accidentally present.

Test. - See Copper (p. 674).

Dose. - 1 to 5 min. or more.

Preparations.

B.P.

Dose.

Linimentum Crotonis (p. 516) ................................

Spiritus Cajuputi .................................................

1/2-l fl. dr.

U.S.P

None.

Uses. - It is a powerful stimulant and antispasmodic. Locally it acts as a stimulant and rubefacient. It is used externally in skin diseases - pityriasis, psoriasis, and acne rosacea. In this last disease it is said to be particularly useful and also in eczema.1 It has also been used externally, alone, or with olive oil, in cases of muscular and articular rheumatism, and gout. Applied to a carious tooth, it relieves pain in the same way as oil of cloves. Internally it is used to relieve flatulence. A few drops on a piece of sugar are useful in neuralgia and hysteria, and its internal use is said to be also useful in chronic rheumatism.

1 Claiborne, Gaillard's Med. Joum., Virginia, U.S.A.