Eucalyptus is obtained from the eucalyptus globulus, a tree of large size, and of the natural order Myrtaceae, found originally in Australia, and known as the "Blue Gum Tree." These trees are now growing in the southern parts of Europe and the United States, and northern Africa, and their presence is thought to be preventive of malaria. The leaves, which are ensiform, of a grayish-green color, and parchment-like, are the only part which possesses medicinal qualities. They have a pleasant, aromatic odor, with a warm, bitter, and somewhat pungent taste, like that of cubebs, the fresh being more active than the dried leaves.

The chief medicinal constituent of eucalyptus is the oil {Oleum Eucalypti U. S.), from which is derived a camphoraceous body obtained by re-distillation with caustic potash or chloride of lime, known as Eucalyptol, U. S. The oil of eucalyptus and eucalyptol is used for the same purposes, but eucalyptol is the refined product of the oil.

Medical Properties And Action

Eucalyptus is antiseptic, disinfectant, sedative, tonic, diaphoretic and somewhat astringent. When taken into the mouth, it excites a flow of saliva, and leaves a hot, pungent taste, and a persistent and disagreeable odor. When introduced into the stomach, it causes a sensation of warmth, and promotes the secretion of the gastric juice. Being stomachic, it increases the appetite and the digestive action, with increased intestinal secretion. Large doses produce offensive eructations, a feeling of weight and tension at the epigastrium, and indigestion, followed by diarrhoea, and irritation and congestion of the kidneys. It increases the action of the heart, lessening the arterial tension, and causes a feverish condition. It accelerates the respiratory movements, and although it induces sleep in the weak and anemic, it has the opposite effect on the strong and healthy. The secretions of the skin, mucous membrane and kidneys are increased by it, and become strongly odorous, owing to the presence of eucalyptol, a name given to the oil. The inhalation of large quantities of the vapor produces effects analagous to those of the agent when taken in substance, and the essential oil is readily diffusible and readily impregnates the blood.

Therapeutic Uses

While the internal use of eucalyptus is contra-indicated in inflammatory conditions, it is a very efficient remedy in atonic dyspepsia ; chronic gastric and intestinal catarrh, cachectic conditions, flatulence, palpitation of the heart, hysteria, chorea, asthma, catarrhal broncho-pulmonary affections, chronic diseases of the liver and bladder, etc. It is also employed in intermittent fever, and during convalescence from remittent fever. Externally, it is an efficient application to chronic forms of angina and tonsilitis, to foul ulcers and wounds, etc.


Of the Oleum Eucalypti Dose 1027 to xv ; its active principle - Eucalyptol is to be preferred to the oil as more concentrated and uniform in action. Dose of eucalyptol to x in capsules.

Dental Uses

In dental practice, the decoction of the leaves is an efficient local application in the different forms of stomatitis, after the acute stage has subsided. The tincture and the distilled water of eucalyptus, or fluid extract, are used as disinfectant applications in indolent offensive ulcers of the mucous membrane of the mouth, stomatitis, pharyngitis, etc. The tincture of eucalyptus has been employed with advantage to obtund the sensibility of dentine. The oil of eucalyptus, either alone or combined with iodoform, forms one of the most effective antiseptics in use, for the treatment of putrescent pulps of teeth, alveolar abscess, of the chronic form, pyorrhoea alveolaris, foul ulcers of the mouth, etc.

No other preparation appears to prove more efficient as an antiseptic than the combination of eucalyptus oil and iodoform, in the treatment of suppurating conditions, putrescent pulp-canals, necrosis, and caries of the bones of the jaws, etc. The oil can be introduced as an injection, with an abscess syringe, or by means of a fine broach armed with cotton, taking care that the agent is carried to the seat of the disease, and the application repeated as often as necessary. It may also be applied by dipping a pledget of cotton in the oil and then in finely pulverized iodoform (Truman), and carried to the tooth, as in cases of putrescent pulps. It is also employed as a local anaesthetic for odontalgia, and as an astringent or styptic in superficial hemorrhages, mucous discharges, ulcerating mucous membrane of the mouth, and for spongy, ulcerating gums.

Eucalyptus has a solvent effect upon gutta percha, a fact which should be remembered when using it in connection with temporary fillings of the former material, or of Hill's stopping.


Each fluid ounce is composed of oil of eucalyptus 3.8 minims, thymol 15.32 grains, oil gaultheria 9.32 minims, menthol 5.64 grains, boric acid 10 15/16 grains, and fluid extract wild indigo 11.4 minims. Antiseptic, Germicide and Deodorant.

Euthymol is a powerful germicide while it is innocuous in its effects, and in addition to its deodorant properties it is detergent, readily cleansing both the hands and instruments, and by its use any operation can be made aseptic, thus preventing septic infection. It may be employed as a mouth wash. It keeps without deterioration, and its liquid form insures prompt and accurate dilution at any instant. It is applied externally as a douche, as a spray, by atomization, etc. It does not stain fabrics, and has no unpleasant odor.

Euformal is composed of oil of eucalyptus, oil of gaultheria, thymol, menthol, boric acid, fluid extract of wild indigo, and formaldehyde (40 per cent.). It is a more powerful antiseptic, disenfectant and germicide than euthymol, and combines the properties of euthymol with the germicidal power of formaldehyde, and is very efficient as a deodorant. It is non-toxic, non-irritant, and does not stain. It quickly removes putrid odors from decomposing animal and vegetable matter, combining with sulphuretted hydrogen and ammonia bases generally to form inodorous compounds. It removes the odor of perspiration, and destroys the disagreeable smell of the feet, for which it is used in a diluted form. It disenfects instruments and hands, and is useful as a prophylactic in infectious diseases. It is of great value as a mouth wash to remove offensive breath, in the proportion of half a teaspoonful of euformal to a tumblerful of water used as a gargle. It also proves useful in bites and stings of insects.

Wyeth's Antiseptic Solution

Composed of proportionate combinations of eucalyptus, gaultheria, mentha arvensis, and baptisia tinctoria, with 16 grains of benzo-boric acid in each fluid ounce.

Dental Formulae

For Abscess of Antrum.

Olei eucalypti . . . Acidi carbolici . . .


Olei gaultherire . . Signa. - Use as an injection.

Dental Formulae 1029Dental Formulae 1030

For Suppurating Pulps, Ulcers, etc. Olei eucalypti . . . xv. M.


Apply as an injection, by means of a syringe; or on cotton wrapped on the end of a fine broach; or on a strand of floss-silk.

Signa 1031Signa 1032

For Abscess of Antrum.

Dr. Geo. L. Parmele.





To be used as an injection in connection with a tent of floss-silk saturated with glycerine and eucalyptus. 26

Signa 1033Signa 1034

For Root Canals as an Antiseptic.

Dr. R. D. Pedley.

Olei eucalypti ... 2 parts Olei caryoph. ... 3 parts

Creasoti.....10 parts. M.

Into this dissolve gum mastich to saturation, filter through cotton-wool and thoroughly incorporate with iodoform in a mortar until it becomes a solid mass.


Introduce on floss-silk or wisps of cotton, and cap it with a disk of metal and insert temporary filling.

Signa 1035

For Alveolar Pyorrhaea

(Riggs' Disease.)

Dr. G. V. Black.

Olei eucalypti . . . Acidi carbolici . . . Olei gaultheriae . . Signa. - Apply by means of an abscess syringe.

Signa 1036Signa 1037