aematoxylon, also known as logwood is a tree that grows in Jamaica and the West Indies. It produces a popular dye but has long had medicinal properties as well. King's Dispensatory writes:
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Action, Medical Uses, and Dosage.—Logwood is a tonic and unirritating astringent, less constipating than many other astringents, and is useful in hemorrhages from the uterus, lungs, and bowels, in old diarrhoeas and dysenteries, in summer complaint of children, and in night-sweats. A favorable preparation with many of the older practitioners in cholera infantum, after a proper employment of the syrup of rhubarb and potassa, is the following: Dissolve 2 drachms of extract of logwood in 4 fluid ounces of boiling water, to this solution add 2 fluid drachms of ammoniated tincture of opium, 3 fluid drachms of tincture of catechu, 1 fluid drachm of compound spirits of lavender, and 4 fluid ounces of simple syrup, or syrup of ginger. The dose is a teaspoonful every 3 or 4 hours. An infusion of logwood taken internally, and also used locally, in form of spray or injection, has effectually cured several cases of obstinate and offensive ozoena. In constitutions broken down by disease, dissipation, or the excessive use of mercury, the decoction of logwood, used freely in connection with the other treatment, will be found highly beneficial. Dose of the decoction, from 2 to 4 fluid ounces; of the extract, 5 to 30 grains. The use of logwood imparts a blood-red color to the stools and the urine. It should never be combined with chalk or lime-water, as they are incompatibles.
Beyond the above traditional medical uses, it was found that Haematoxylon & DMSO could be a cancer tumor remedy. A 1968 study suggests that this combination could be highly valuable in treating tumors.