In addition to it's Anti-Pathogenic Properties, many published References claim that Eucalyptus Oil thins mucous in the Lungs and is a good Expectorant after a Cold or Flu is contracted.

The 1997 Commission E on Phytotherapy and Herbal Substances of the German Federal Institute for Drugs recommends Eucalyptus leaf for 'Catarrhs of the Respiratory Tract.

Contraindications: Inflammation of the gastrointestinal tract and the bile ducts; serious liver diseases. Eucalyptus preparations should not be applied to the face, especially the nose, of babies and very young children. Side Effects: In rare cases, after taking eucalyptus preparations nausea, vomiting, and diarrhea may occur. Note: Eucalyptus oil induces the enzyme system of the liver involved in the detoxification process. Therefore, the effects of other drugs can be weakened and/or shortened.

Dosage: Internal: Average daily dosage: 4 - 6 g of leaf; equivalent preparations. Tincture (according to Erg. B. 6): Daily dosage 3 - 9 g. Mode of Administration: Chopped leaf for infusions and other galenical preparations for internal and external application.

Actions: Secretomotory: Expectorant; Weakly antispasmodic.

Eucalyptus leaves are, of course, koala food, the arboreal symbol of Australia, but can now be found in subtropical regions throughout the world.

Eucalyptus was also known as Australian fever tree, a reference to its ancient Native Australian usage. The medicinal properties of Eucalyptus reside in its oil, which is extracted from the fresh leaves and branch tips, and is found in the dried leaves. It acts as a decongestant, loosens phlegm, and relieves spasms.

Eucalyptus leaves are therefore useful, as a tea or decoction, for bronchitis, cough and colds. Eucalyptus has been shown to be powerfully bacteriocidal in the laboratory.

Like the similar soothing agents menthol and camphor, Eucalyptus is found in several familiar over-the-counter remedies, including Listerine Antiseptic Mouthrinse, Mentholatum Cherry Chest Rub, and Vicks VapoRub.

Grieve's classic A Modern Herbal: Stimulant, antiseptic, aromatic.

The medicinal Eucalyptus Oil is probably the most powerful antiseptic of its class, especially when it is old, as ozone is formed in it on exposure to the air. It has decided disinfectant action, destroying the lower forms of life. Internally, it has the typical actions of a volatile oil in a marked degree.

Eucalyptus Oil is used as a stimulant and antiseptic gargle. Locally applied, it impairs sensibility. It increases cardiac action.

It's antiseptic properties confer some antimalarial action, though it cannot take the place of Cinchona.

An emulsion made by shaking up equal parts of the oil and powdered gum-arabic with water has been used as a urethral injection, and has also been given internally in drachm doses in pulmonary tuberculosis and other microbic diseases of the lungs and bronchitis.

In croup and spasmodic throat troubles, the oil may be freely applied externally.

The oil is an ingredient of 'catheder oil,' used for sterilizing and lubricating urethral catheters.

King's 1898 Dispensatory: The oil of eucalyptus (which is chiefly eucalyptol) and eucalyptol, in small doses, are gentle stimulants...

Eucalyptus globulus has for a long time been known as a remedy for intermittent fever among the natives of the countries of its origin.

Aside from its alleged utility in intermittents, this agent has had other virtues attributed to it, as follows: The leaves and their preparations have been successfully used as a tonic and gently stimulating stomachic, in atonic dyspepsia, and in catarrh of the stomach and typhoid fever; also advised in mucous catarrhal affections generally; in pseudo-membranous laryngitis, in asthma, with profuse secretion, and in chronic bronchitis, with or without emphysema, and in whooping-cough; it has likewise proved efficient in chronic catarrh of the bladder, where the urine is high-colored, contains an abnormal amount of mucus, or, perhaps, some purulent matter, and micturition is attended with much pain. More recently it has been recommended as a diuretic in the treatment of dropsy.

Both the leaves and the oil, as well as eucalyptol, are excitants and deodorizers, and, as such, have been successfully employed as local applications in bronchial affections with fetid expectoration, in ozena, in fetid or profuse mucous discharges, in vaginal leucorrhoea, offensive lochial discharges, gonorrhoeal discharges, indolent, fetid wounds or ulcers, cancerous ulcerations, in septicemia, and in gangrene.

As a deodorizer, the tincture or the oil may be sprinkled or sprayed upon the offensive body, or the atmosphere of an apartment may be frequently sprayed with the same.

The most agreeable and convenient forms of administration are the tincture, in doses of 10 to 30 drops; or the fluid extract in doses of 5 to 30 drops, in syrup; or, preferable to all, specific eucalyptus, from 10 to 30-drop doses in malarial troubles, and from 5 to 10-drop doses in other troubles. It may be given with glycerin or syrup, as it does not mix well with water. The dose of the oil and of eucalyptol is from 5 to 10 minims, preferably in capsules.

American Materia Medica, 1919 (Ellingwood): 'In therapeutic action this agent closely resembles cinchona. It is antimalarial, antiperiodic, febrifuge and tonic. The tree has been planted in malarial sections, and wherever planted the malarial conditions have been changed, the disease germs destroyed and the atmosphere purified, the locality becoming healthful and sanitary.

While acting similarly to quinine it may be prescribed where quinine is contraindicated. Its stimulating and antiperiodic influence is not so immediately marked, but its antimalarial influence is persistent, and satisfactory results are ultimately obtained, which can be said also of its antiseptic influence.

It may be given in low forms of fever where the stimulating influence of quinine is too great, increasing the fever. In these cases eucalyptus will reduce the fever.

It is of much service in malarial neuralgia, in malarial headache and in vague intermittent conditions of an indefinable character.

The antimalarial and distinctly antiseptic properties of eucalyptus give it a prominent place in the therapeutics of typhoid fever;. while it has many of the essential tonic and restorative properties, it is most active as an intestinal antiseptic.

In the treatment of diphtheria, eucalyptus is an excellent remedy. It may be used as a gargle diluted, and when the membrane has formed in the larynx or in the nasal passages, if fifteen drops of a mixture of equal parts of the oil of eucalyptus and turpentine be dropped upon the surface of hot water in a close-mouthed vessel, and the vapor inhaled by the patient for a few minutes every two hours, there is nothing that will more speedily destroy the membrane and assist in its removal.

The writer has been successful in completely clearing the nasal passages within thirty-six hours by this measure when the occlusion was nearly complete. This course is almost equally applicable in membranous croup. A specific measure in this disease is to give internally every two hours five drops of a mixture of equal parts of the tinctures of eucalyptus and jaborandi. If the membrane has formed extensively, this course loosens it and permits it to be thrown off. If it is in the early forming stage, the growth ceases and the membrane disappears. These facts have all been confirmed in a multitude of cases.

Eucalyptus if further used in tonsillitis in chronic post-nasal and bronchial catarrhs in asthma, in which case the vapor either alone or with that of stramonium is very useful, and in those conditions of the lungs and bronchi where there is offensive expectoration, pus or a suggestion of gangrene. In the constitutional treatment of phthisis it is of value, and if a few drops of the oil be added to cod liver oil, it will remove the disagreeable flavor of the latter agent.

The agent has been extensively used in the treatment of catarrh of the bladder, nephritis, pyelonephritis and pyelitis, especially if the urine be decomposed and offensive. It is useful also in gonorrhea and in gleet and as a wash in specific vaginitis.

In uterine catarrh this agent is valuable used as a douche in the proportion of two drams of the tincture to a pint of water. Whenever offensive discharges from these parts are present, it is useful in ulceration of the cervix. It may be made into a suppository with cocoa butter and white wax, in the proportion of one part of the oil to three parts of the other mixed constituents. This suppository is of great service after labor, either where the douche cannot be used or to be inserted after the douche where there is traumatism. This suppository is of value in uterine cancer. It relieves pain and corrects the odor of the discharges.